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X-WR-CALNAME:Osservatorio Astronomico di Roma
X-ORIGINAL-URL:https://www.oa-roma.inaf.it
X-WR-CALDESC:Eventi per Osservatorio Astronomico di Roma
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BEGIN:VTIMEZONE
TZID:Europe/Rome
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20180325T010000
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BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20181028T010000
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BEGIN:DAYLIGHT
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TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20190331T010000
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TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20191027T010000
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TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20200329T010000
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DTSTART:20201025T010000
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END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190122T114500
DTEND;TZID=Europe/Rome:20190122T124500
DTSTAMP:20260404T183059
CREATED:20180725T070311Z
LAST-MODIFIED:20180725T070311Z
UID:4172-1548157500-1548161100@www.oa-roma.inaf.it
SUMMARY:colloquium - Viola Allevato
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-viola-allevato/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190122T114500
DTEND;TZID=Europe/Rome:20190122T124500
DTSTAMP:20260404T183059
CREATED:20180725T070311Z
LAST-MODIFIED:20190108T105344Z
UID:4757-1548157500-1548161100@www.oa-roma.inaf.it
SUMMARY:Clustering dependence of X-ray AGN on host galaxy properties
DESCRIPTION:The presence of a super massive BH in almost all galaxies in the Universe is an accepted paradigm in astronomy. How these BHs form and how they co-evolve with the host galaxy is one of the most intriguing unanswered problems in modern Cosmology and of extreme relevance to understand the issue of galaxy formation. Clustering measurements can powerfully test theoretical model predictions of BH triggering scenarios and put constraints on the typical environment where AGN live in\, through the connection with their host dark matter halos. In this presentation I will talk about the clustering properties of X-ray AGN from both an observational and theoretical point of view\, using the new catalog of AGN detected by Chandra in COSMOS and semi-empirical models. The Chandra COSMOS-Legacy catalog is one of the largest available sample of X-ray AGN for clustering studies\, allowing clustering measurements as a function of obscuration\, luminosity and AGN host galaxy properties.
URL:https://www.oa-roma.inaf.it/event/colloquium-viola-allevato-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190129T114500
DTEND;TZID=Europe/Rome:20190129T124500
DTSTAMP:20260404T183059
CREATED:20181008T132647Z
LAST-MODIFIED:20181008T132647Z
UID:4434-1548762300-1548765900@www.oa-roma.inaf.it
SUMMARY:colloquium - Antonio Stamerra
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-antonio-stamerra/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190129T114500
DTEND;TZID=Europe/Rome:20190129T124500
DTSTAMP:20260404T183059
CREATED:20181008T132647Z
LAST-MODIFIED:20190123T133205Z
UID:4774-1548762300-1548765900@www.oa-roma.inaf.it
SUMMARY:Multimessenger astrophysics with active galactic nuclei: observational clues of gamma-neutrino connection in blazars
DESCRIPTION:The clear detection of an isotropic flux of very high energy neutrinos by the IceCube experiment has opened the quest for the identification of their possibile electro-magnetic (EM) counterparts. Active Galactic Nuclei (AGNs) of the blazar category are considered as the main cosmic neutrino source candidates\, although contribution from other types of active galaxies and Galactic sources is expected. Observation of transient EM emission\, spatially and temporally compatible with the IceCube neutrinos\, is crucial to identify their possible counterpart. Since April 2016\, the IceCube Collaboration alerts the astronomical community whenever a high-energy single neutrino-induced event – HESE – is detected. Thanks to the IceCube real time system and the fast space- and ground-based observations which followed the alert\, a neutrino event recorded on Sept. 22nd\, 2017\, has been significantly associated for the first time to a quasi-simultaneous gamma-ray flare observed by Fermi-LAT\, AGILE and the MAGIC experiment from the AGN blazar TXS 0506+056. In this talk\, we will review this multi-messenger result\, mainly focussing on the MAGIC detection\, and we will present some new results about possible transient gamma-ray sources observed by AGILE\, coincident in time and space with public IceCube HESE neutrino events.
URL:https://www.oa-roma.inaf.it/event/colloquium-antonio-stamerra-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190130T114500
DTEND;TZID=Europe/Rome:20190130T124500
DTSTAMP:20260404T183059
CREATED:20190122T130016Z
LAST-MODIFIED:20190122T130016Z
UID:5178-1548848700-1548852300@www.oa-roma.inaf.it
SUMMARY:Ultraviolet imager with wide-field & deep for astronomical observation and study
DESCRIPTION:Base on the ultraviolet radiation characteristics of cosmic celestial models and different morphological materials\, the astronomical ultraviolet band observation has important scientific significance and research value for the study of astronomical scientific problems such as searching for the cosmic missing baryons\, studying the transport process of stellar and galaxies in the cosmic environment. China is currently developing the space station optical facility with an observation band covering near ultraviolet to infrared range. The wide-field deep ultraviolet imager (WDUI) is proposed on the optical facility of the China space station (CSS)\, which can overcome the influence of the Earth’s atmosphere and obtain the remarkable astronomical observation  efficiency in the ultraviolet band. It promotes the development level of the astronomical ultraviolet band observation instrument and promotes the observation of the ultraviolet astronomical section of the space astronomical science. Output of scientific achievements has a positive effect. This talk reviews the background of the payload proposal\, the astronomical observation capability of the CSS optical facility\, the scientific goals of the payload\, the preliminary system design and technical characteristics of the payload\, and possible other band observations.
URL:https://www.oa-roma.inaf.it/event/ultraviolet-imager-with-wide-field-deep-for-astronomical-observation-and-study/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190205T114500
DTEND;TZID=Europe/Rome:20190205T124500
DTSTAMP:20260404T183059
CREATED:20180731T173932Z
LAST-MODIFIED:20180731T173932Z
UID:4274-1549367100-1549370700@www.oa-roma.inaf.it
SUMMARY:colloqium - Eva Villaver
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloqium-eva-villaver/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190205T114500
DTEND;TZID=Europe/Rome:20190205T124500
DTSTAMP:20260404T183059
CREATED:20180731T173932Z
LAST-MODIFIED:20190114T134429Z
UID:4762-1549367100-1549370700@www.oa-roma.inaf.it
SUMMARY:From AGB stars to Planetary Nebulae: what the ISM\, stellar rotation\, and companions can do
DESCRIPTION:Asymptotic giant branch (AGB) stars lose their envelopes by means of heavy mass-loss rates. Besides the mass-loss process itself there are other mechanisms that influence the evolution of the star and of what we see as Planetary Nebulae. Among them are the interaction of the ejecta with the interstellar medium (ISM)\, the inclusion of stellar rotation and/or the presence of a companion. I will present our simulation of the interaction process between AGB stars and  the ISM. I will show what we can expect for the planetary nebula formation when we include rotation in stellar evolution models and finally I will describe how these stars are influenced by the presence of external companions
URL:https://www.oa-roma.inaf.it/event/colloqium-eva-villaver-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190212T114500
DTEND;TZID=Europe/Rome:20190212T124500
DTSTAMP:20260404T183059
CREATED:20181010T170838Z
LAST-MODIFIED:20181010T170838Z
UID:4438-1549971900-1549975500@www.oa-roma.inaf.it
SUMMARY:Colloquium - Marianna Torelli
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-marianna-torelli/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190212T114500
DTEND;TZID=Europe/Rome:20190212T124500
DTSTAMP:20260404T183059
CREATED:20181010T170838Z
LAST-MODIFIED:20190122T090137Z
UID:4775-1549971900-1549975500@www.oa-roma.inaf.it
SUMMARY:Stellar Populations in Local and high redshift Universe
DESCRIPTION:Synthetic stellar libraries are quite popular to constrain the stellar pop-\nulations (age and metallicity distribution) of unresolved systems like high redshift galaxies.\nHowever\, they are typically based on theoretical Spectral Energy Distributions (SEDs).\nIt is important to build up empirical synthetic stellar li-\nbraries\, calibrated on local systems and\ncovering a broad range in ages (globular clusters\, old open clusters)\,\nchemical compositions (iron\, alpha\, CNO) and dynamical properties (nearby\ndwarf galaxies)\, able to improve our SED fitting codes to deeply investigate\nhigh redshift galaxies.\nTo do that\, I am taking advantages of a sample of 65 Galactic globular clus-\nters (GGCs) for which we have accurate and homogeneous optical photometry\nbased on space (ACS at HST\, innermost regions) and ground-based\n(up to the tadial radius).\nIn particular\, I will present the results on the study of the Horizontal Branch\n(HB) morphology for 64 GGCs in our sample.\nI will introduce a very new photometric morphology index based\non the cumulative density function of the stars along the HB\,\nuseful to investigate the well known “second\nparameter problem” affecting age estimations and so\, stellar libraries.\nI will also discuss the results of the analysis on galaxy\nevolution through the Galaxy Stellar Mass Function (GSMF) up to redf-\nshift 4\, obtained combining all the five CANDELS fields (GOODS-South\,\nGOODS-North\, EGS\, COSMOS\, UDS)\, the Frontier Fields Parallels (Abell 2744\,\nMACSJ0416\, MACSJ0717\, MACSJ1149) and the Ultravista/COSMOS\nfield. Stellar masses have been estimated fitting the photometry to syn-\nthetic models: these surveys are characterized by multi-wavelength (deep\noptical/near-infrared/mid-infrared) coverage (CANDELS)\, very high limiting magnitudes\n(Frontier Fields) and large areas (UltraVista)\, allowing to explore the GSMF\nfrom low masses to the high-mass end.
URL:https://www.oa-roma.inaf.it/event/colloquium-marianna-torelli-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190214T114500
DTEND;TZID=Europe/Rome:20190214T124500
DTSTAMP:20260404T183059
CREATED:20181106T174714Z
LAST-MODIFIED:20181106T174714Z
UID:4817-1550144700-1550148300@www.oa-roma.inaf.it
SUMMARY:colloquium - Giuseppe Tanzella-Nitti
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-giuseppe-tanzella-nitti/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190219T114500
DTEND;TZID=Europe/Rome:20190219T124500
DTSTAMP:20260404T183059
CREATED:20180907T101417Z
LAST-MODIFIED:20180907T101417Z
UID:4371-1550576700-1550580300@www.oa-roma.inaf.it
SUMMARY:colloquium - Guido De Marchi
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-by-guido-de-marchi/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190219T114500
DTEND;TZID=Europe/Rome:20190219T124500
DTSTAMP:20260404T183059
CREATED:20180907T101417Z
LAST-MODIFIED:20190118T055424Z
UID:4767-1550576700-1550580300@www.oa-roma.inaf.it
SUMMARY:Star formation in the Local Group
DESCRIPTION:Using Hubble Space Telescope (HST) observations\, we have identified and\ncharacterised almost 50\,000 pre-main sequence (PMS) stars in several\nstar-forming regions in the Milky Way and Magellanic Clouds. These objects\nare still undergoing active mass accretion\, as revealed by excess emission\nin the Halpha band. Detailed knowledge of the extinction law in these\nfields\, which we derive directly from the observations\, allows us to\naccurately obtain stellar physical parameters (temperature\, luminosity\,\nage\, mass\, and mass accretion rate). This is presently the largest and\nmost homogeneous sample of PMS objects\, on which we are conducting the\nfirst comprehensive and systematic study of the PMS phase\, spanning a wide\nrange of masses (0.5-4 Msun)\, metallicities (0.1-1 Zsun) and ages (0.5-30\nMyr). \nI will discuss how star formation has proceeded in these regions over\nmultiple recent bursts and how the accretion process depends on the\nphysical properties of the individual stars and of the environment. We\nhave discovered an important dependence of the mass accretion rate on\nmetallicity: mass accretion rates for stars of the same mass and age are\nsystematically higher in the Magellanic Clouds than in the Milky Way and\nare expected to have been equally high at redshift z~2\, when star\nformation was at its peak in the Universe. I will also show a surprising\nanti-correlation between the variability and intensity of the Halpha\nexcess: this suggests a discrete and clumpy nature for the accretion\nprocess and reveals that the characteristic mass of the infalling parcels\nof gas is comparable to that of the moons of giant planets in the solar\nsystem. \nTo close\, I will illustrate how we plan to thoroughly verify these results\nspectroscopically and to extend them to lower mass objects and to more\nextinguished environments through already planned guaranteed-time\nobservations with the James Webb Space Telescope. Our measurements will\nprovide\, for the first time\, quantitative information on the nature\,\nexcitation\, and kinematics of the infalling gas in these dense environments.
URL:https://www.oa-roma.inaf.it/event/colloquium-by-guido-de-marchi-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190226T114500
DTEND;TZID=Europe/Rome:20190226T124500
DTSTAMP:20260404T183059
CREATED:20181105T103706Z
LAST-MODIFIED:20190219T062329Z
UID:4807-1551181500-1551185100@www.oa-roma.inaf.it
SUMMARY:When the going get tough... or: observation and laboratory work for life searching in other worlds
DESCRIPTION:“…if we never search\, the chance of success is zero”. This was the conclusion in the seminal paper of G. Cocconi and P. Morrison in 1959 about the search for life. Since then\, a lot of progress in technology and a lot of exciting results in astrophysics have been reached. Today\, we know that\, out of there\, there are more than 4000 new worlds showing a large diversity in their size and orbital characteristics. In the midst of all these strange new worlds\, a very promising type of them\, the super Earths\, seems to be ubiquitous in the Galaxy. Moreover\, in fashion there are super Earths orbiting M stars. But\, such an odd couple could host life? And if it can\, how to find it?
URL:https://www.oa-roma.inaf.it/event/colloquium-sandeep-haridasu/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190305T114500
DTEND;TZID=Europe/Rome:20190305T124500
DTSTAMP:20260404T183059
CREATED:20180728T055834Z
LAST-MODIFIED:20180728T055834Z
UID:4271-1551786300-1551789900@www.oa-roma.inaf.it
SUMMARY:colloquium - Francesco Massaro
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-francescao-massaro/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190305T114500
DTEND;TZID=Europe/Rome:20190305T124500
DTSTAMP:20260404T183059
CREATED:20180728T055834Z
LAST-MODIFIED:20190223T062348Z
UID:4761-1551786300-1551789900@www.oa-roma.inaf.it
SUMMARY:Flipping a fair coin to decipher the large-scale environment of radio galaxies
DESCRIPTION:The role played by the large-scale environment in the nuclear activity of radio galaxies  is still not completely understood. Accretion mode\, jet power\, and galaxy evolution are connected with their large-scale environment on scales from tens to hundreds of kiloparsecs. I am presenting a detailed statistical analysis of the large-scale environment for two samples of radio galaxies in the local Universe (i.e.\, up to redshift 0.15).\nI will discuss on a direct search of galaxy-rich environments around radio galaxies by using them as beacons. To carry out this study a new method\, that does not appear to suffer cosmological biases and artifacts\, as other algorithms\, was developed. I conclude that\, despite their radio morphological classification (FRI versus FRII) and/or their optical classification (high- or low-excitation radio galaxy\, i.e.\, HERG or LERG)\, radio galaxies in the local universe tend to live in galaxy-rich large-scale environments that have similar characteristics and richness. I will then show that properties of large-scale environments of both FRIs and FRIIs do not depend by the property of central radio galaxy. Finally\, I will provide an estimate of the X-ray parameters that can be derived from optical observations to plan future follow up campaigns.
URL:https://www.oa-roma.inaf.it/event/colloquium-francescao-massaro-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190312T114500
DTEND;TZID=Europe/Rome:20190312T124500
DTSTAMP:20260404T183059
CREATED:20180725T070413Z
LAST-MODIFIED:20180725T070413Z
UID:4174-1552391100-1552394700@www.oa-roma.inaf.it
SUMMARY:colloquium - Roberto Speziali
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-roberto-speziali/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190312T114500
DTEND;TZID=Europe/Rome:20190312T124500
DTSTAMP:20260404T183059
CREATED:20180725T070413Z
LAST-MODIFIED:20190226T062537Z
UID:4758-1552391100-1552394700@www.oa-roma.inaf.it
SUMMARY:LBT - Italia
DESCRIPTION:LBT – ITALIA è un’organizzazione formata da un team di ricercatori dell’INAF che ha come obiettivo la gestione delle osservazioni al LARGE BINOCULAR TELESCOPE. A distanza di sette anni dall’inizio delle operazioni\, si fornirà una panoramica della strumentazione e si descriverà l’attività del gruppo illustrando i risultati ottenuti.\nAl termine del seminario\, ampio spazio verrà dato alla discussione al fine di ricevere feddback da parte degli utenti\nche hanno già usufruito dei servizi di LBT-ITALIA e rispondere alle domande in vista della imminente apertura della call 2019-2020.
URL:https://www.oa-roma.inaf.it/event/colloquium-roberto-speziali-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190314T114500
DTEND;TZID=Europe/Rome:20190314T124500
DTSTAMP:20260404T183059
CREATED:20190111T175301Z
LAST-MODIFIED:20190211T095351Z
UID:5165-1552563900-1552567500@www.oa-roma.inaf.it
SUMMARY:Neutrinos from a blazar jet and the birth of non-stellar neutrino astronomy
DESCRIPTION:IceCube has recently reported the discovery of high-energy neutrinos of astrophysical origin\,\nopening up the PeV (10^15 eV) sky. These observations are challenging to interpret on the\nastronomical side and have triggered a fruitful collaboration across particle and astro-physics.\nI will discuss the very recent association between high-energy IceCube neutrinos and the\nblazar TXS 0506+056\, reporting on how this result fits with the work done by our group over\nthe past five years. I will then present the “big picture”\, explain why this this association is\nvery important for astronomy\, and discuss some very recent results on the nature of TXS 0506+056.\nThe talk is self-contained\, requires no previous knowledge of neutrinos or blazars\, and has been\nprepared for a very broad audience.
URL:https://www.oa-roma.inaf.it/event/colloquium-paolo-padovani/
LOCATION:OAR Monte Porzio Catone – aula Gratton\, Via Frascati 33\, Roma\, RM\, 00136\, Italia
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190319T114500
DTEND;TZID=Europe/Rome:20190319T124500
DTSTAMP:20260404T183059
CREATED:20181109T150936Z
LAST-MODIFIED:20190318T090252Z
UID:4950-1552995900-1552999500@www.oa-roma.inaf.it
SUMMARY:How quasars affect the formation of the bright cluster galaxy and the circum-galactic medium
DESCRIPTION:AGN activity is considered a fundamental phase of the evolution of the massive galaxies. The accretion onto a SMBH generates a great amount of energy in the form of radiation\, outflows and radio jets that affects both the ISM and CGM. In this talk\, I present the results of two multi-wavelength studies aimed at exploring how nuclear activity affect the formation of the bright cluster galaxy and the circum-galactic medium at high redshift. Firstly\, I will report on the multi-band analysis of the galaxy population in the very dense core (~70 x 70 kpc^2) of one of the most massive galaxy clusters at z ~ 1.6. We are able to shed light on the early\, poorly-explored phase of the assembly of the Brightness Cluster Galaxy (BCG) in a region with high AGN and merger activity.\nI will also report on the properties of both an extended (150 kpc) and luminous (10^44 erg/s) Lya nebula and the associated CIV extended (70 kpc) emission around a hyper-luminous quasar at z~3.6. Our analysis of kinematics of the Lya nebula suggests the presence of a spatially coherent blueshifted (~1000 km/s) component on several tens of kpc scales which we interpret as one of the first indications of an AGN-driven outflow propagating on circum-galactic scales.
URL:https://www.oa-roma.inaf.it/event/colloquium-andrea-travascio/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190326T114500
DTEND;TZID=Europe/Rome:20190326T124500
DTSTAMP:20260404T183059
CREATED:20181008T060951Z
LAST-MODIFIED:20181008T060951Z
UID:4432-1553600700-1553604300@www.oa-roma.inaf.it
SUMMARY:colloquium - Elena Valenti
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-elena-valenti/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190409T114500
DTEND;TZID=Europe/Rome:20190409T124500
DTSTAMP:20260404T183059
CREATED:20190111T092938Z
LAST-MODIFIED:20190403T123956Z
UID:5146-1554810300-1554813900@www.oa-roma.inaf.it
SUMMARY:A MUSE view of the multiple populations' chemistry in Galactic Globular Clusters
DESCRIPTION:Stars in Galactic globular clusters are known to exhibit abundance variations in specific elements such as He\, C\, N\, O\, Na\, and Al. These variations can be observed via spectroscopy but also photometrically by using CMD constructed with various filter combinations. Although these multiple populations have been\, and still are\, the subject of many investigations\, the origin of their elemental abundance variations remain rather mysterious.\nI will present some of our recent results on that topic based on the spectroscopic survey of 26 globular clusters that is currently carried out as part of the MUSE GTO time. With the MUSE survey covering the central regions of the clusters for which HST photometry is available\, we can use these photometric catalogs to separate the RGB stars into two or more populations based on their position in the pseudo-two-color diagrams. Although the MUSE spectra are of relatively low-resolution (R ~ 2500)\, by combining the spectra of the stars within a distinct populations\, we are able to study their abundance variations and relate them directly with the populations distinguished on the pseudo-two-color diagrams.
URL:https://www.oa-roma.inaf.it/event/talk-by-marylin-latour/
LOCATION:OAR Monte Porzio Catone – aula Gratton\, Via Frascati 33\, Roma\, RM\, 00136\, Italia
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190416T114500
DTEND;TZID=Europe/Rome:20190416T124500
DTSTAMP:20260404T183059
CREATED:20190111T094223Z
LAST-MODIFIED:20190408T153611Z
UID:5149-1555415100-1555418700@www.oa-roma.inaf.it
SUMMARY:Lithium Web in astrophysics: insights and problems
DESCRIPTION:Lithium (Li) is widely used as a test of the cosmological model\, a probe of stellar structure\, and an age indicator of young stellar clusters. It is the very element that presents deep insights\, yet many problems to astrophysics.\nI will discuss problems and puzzles that Li introduces in astrophysics\, including cosmological Li problem (and a stellar solution to it)\, Li-rich giants problem (Galactic and extraGalactic)\, Li problem in the Sun\, the Galactic Li evolution (in the thin and thick discs)\, and the interstellar Li content. \n 
URL:https://www.oa-roma.inaf.it/event/colloquium-xiaoting-fu/
LOCATION:OAR Monte Porzio Catone – aula Gratton\, Via Frascati 33\, Roma\, RM\, 00136\, Italia
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190507T114500
DTEND;TZID=Europe/Rome:20190507T124500
DTSTAMP:20260404T183059
CREATED:20180725T070642Z
LAST-MODIFIED:20180725T070642Z
UID:4178-1557229500-1557233100@www.oa-roma.inaf.it
SUMMARY:colloquium - Mauro Centrone
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-mauro-centrone/
LOCATION:RM
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190514T114500
DTEND;TZID=Europe/Rome:20190514T124500
DTSTAMP:20260404T183059
CREATED:20180725T070555Z
LAST-MODIFIED:20180725T070555Z
UID:4176-1557834300-1557837900@www.oa-roma.inaf.it
SUMMARY:colloquium - Francoise Combes
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-francoise-combes/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190514T114500
DTEND;TZID=Europe/Rome:20190514T124500
DTSTAMP:20260404T183059
CREATED:20180725T070555Z
LAST-MODIFIED:20190502T064008Z
UID:4759-1557834300-1557837900@www.oa-roma.inaf.it
SUMMARY:Molecular tori\, black hole fueling and feedback in nearby AGN
DESCRIPTION:Recent molecular line observations with ALMA in several nearby Seyferts have revealed the existence of molecular tori\, and the nature of gas flows at 10-20pc scale. At 100pc scale\, or kpc-scale\, previous work on gravitational torques had shown that only about one third of Seyfert galaxies experienced molecular inflow and central fueling\, while in most cases the gas was stalled in rings. At higher resolution\, i.e. 10-20pc scale\, it is possible now to see in some cases AGN fueling due to nuclear trailing spirals\, influenced by the black hole potential. This brings smoking gun evidence for nuclear fueling. In our sample galaxies\, the angular resolution of up to 80mas allows us to reach the BH-zone of influence and the BH mass can be derived more directly than with the M-sigma relation.
URL:https://www.oa-roma.inaf.it/event/colloquium-francoise-combes-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190521T114500
DTEND;TZID=Europe/Rome:20190521T124500
DTSTAMP:20260404T183059
CREATED:20190304T101823Z
LAST-MODIFIED:20190506T221827Z
UID:5532-1558439100-1558442700@www.oa-roma.inaf.it
SUMMARY:The first image of a black hole
DESCRIPTION:I will briefly discuss how the first image of a black hole was obtained\nby the EHT collaboration. In particular\, I will describe the theoretical\naspects that have allowed us to model the dynamics of the plasma\naccreting onto the black hole and how such dynamics was used to generate\nsynthetic black-hole images. I will also illustrate how the comparison\nbetween the theoretical images and the observations has allowed us to\ndeduce the presence of a black hole in M87 and to extract information\nabout its properties. Finally\, I will describe the lessons we have\nlearned about strong-field gravity and alternatives to black holes.
URL:https://www.oa-roma.inaf.it/event/colloquium-valentina-dorazi/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190528T114500
DTEND;TZID=Europe/Rome:20190528T124500
DTSTAMP:20260404T183059
CREATED:20190220T133740Z
LAST-MODIFIED:20190506T221609Z
UID:5473-1559043900-1559047500@www.oa-roma.inaf.it
SUMMARY:Protoclusters of galaxies: from Planck to the Euclid and JWST era
DESCRIPTION:Clusters of galaxies are key structures for our understanding of galaxy\nevolution physics in denser environments\, for constraining the structure\nformation scenario and some cosmological parameters independantly of\nother techniques like CMB. Despite the difficulties to observe\, detect\nand model them\, there are successes in studying and using galaxy\nclusters. In the recent years\, many hight-redshift galaxy clusters (z>1)\nwere detected as well as many high-redshift protoclusters (z>1.5)\,\nprogenitors of todays’s clusters. These objects help answering crucial\nquestions like how and when the clusters formed stars ? In a\nsynchroneous way ? What is the fate of the gas in clusters ? \nAfter a review of the current status of protoclusters search and\nproperties and the latest results\, I will focus on the original program\nwe are performing with Planck\, Herschel\, Spitzer\, IRAM\, ALMA and other\nfacilities. \nWe selected an original sample of about 2000 highly star-forming\nstructures candidates in Planck\, deep in the Cosmic Infrared Background.\nSelection was not done in SZ\, but by colors of the redshifted peak of\nthermal far-infrared emission of galaxies. We observed about 200 of them\nwith Herschel/SPIRE\, about 80 of them with Spitzer/IRAC\, and about a\ndozen in the near-infrared and millimeter ranges. We have a few redshift\nconfirmations\, and I will highlight our main findings\, work in progress\,\nand perspectives of the SPHerIC subsample (Spitzer\, Planck\, Herschel\ninfrared clusters). \nA colleague said wisely about high-redshift clusters and protoclusters\nin a review talk\, « we need more than one object at a time. » Euclid and\nJWST will make evolve this field (and other) after 2021 with increasing\nstatistics and a sharp\, detailed view of these structures at the\n« cosmic noon » epoch and earlier.
URL:https://www.oa-roma.inaf.it/event/colloquium-herve-dole/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190611T114500
DTEND;TZID=Europe/Rome:20190611T124500
DTSTAMP:20260404T183059
CREATED:20190328T073046Z
LAST-MODIFIED:20190328T073046Z
UID:5792-1560253500-1560257100@www.oa-roma.inaf.it
SUMMARY:Orlando Luongo - colloquium
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/orlando-luongo-colloquium/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190613T114500
DTEND;TZID=Europe/Rome:20190613T124500
DTSTAMP:20260404T183059
CREATED:20190405T105451Z
LAST-MODIFIED:20190408T052554Z
UID:5898-1560426300-1560429900@www.oa-roma.inaf.it
SUMMARY:Probing Dark Matter and Dark Energy with strong gravitational lensing
DESCRIPTION:Evidence from different cosmological probes have lead to the establishment of the dark matter and dark energy paradigm. Dark matter dominates the matter budget at cosmological scales and drives the formation of structure and dark energy is responsible for the late time acceleration of the universe. To date\, these phenomenas have purely been described as gravitational effects and no other evidence have provided convincing evidence for their underlying physical nature – remaining one of the most striking mysteries the universe has not yet revealed.\nIn my talk\, I will describe the phenomena of strong gravitational lensing and how we can use this unique probe to constrain the physical nature of dark matter and dark energy. I am going to highlight recent results in both domains. I will then look in the near future and highlight the prospects of this technique with increasing sample size\, analysis techniques and instrumentation.
URL:https://www.oa-roma.inaf.it/event/simon-birrer-colloquium/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190618T114500
DTEND;TZID=Europe/Rome:20190618T124500
DTSTAMP:20260404T183059
CREATED:20190222T092344Z
LAST-MODIFIED:20190531T163519Z
UID:5490-1560858300-1560861900@www.oa-roma.inaf.it
SUMMARY:The eye of Gaia on globular clusters dynamics
DESCRIPTION:I present the results of a survey of the kinematics of a large sample of Galactic globular clusters performed thanks to the synergy between the 2nd Gaia data release and the most extensive collection of radial velocities. This unprecedented dataset of 3D velocities of thousand of stars in more than 100 globular clusters has been used to investigate both the internal (masses\, anisotropy and rotation patterns) and the systemic dynamics (orbits\, tides) of these stellar systems providing also insight into the overall structure of the Galactic globular cluster system.
URL:https://www.oa-roma.inaf.it/event/colloquium-antonio-sollima/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
END:VCALENDAR