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DTSTART:20170326T010000
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DTSTART:20171029T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20181211T114500
DTEND;TZID=Europe/Rome:20181211T124500
DTSTAMP:20260405T014507
CREATED:20180910T113353Z
LAST-MODIFIED:20180910T113353Z
UID:4374-1544528700-1544532300@www.oa-roma.inaf.it
SUMMARY:colloquium - Marco Padovani
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-marco-padovani/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20181211T114500
DTEND;TZID=Europe/Rome:20181211T124500
DTSTAMP:20260405T014507
CREATED:20180910T113353Z
LAST-MODIFIED:20181203T092120Z
UID:4768-1544528700-1544532300@www.oa-roma.inaf.it
SUMMARY:The role of cosmic rays on physical and chemical processes of the interstellar medium
DESCRIPTION:The study of the interaction of cosmic rays with the interstellar matter is a multi-disciplinary investigation that involves the analysis of several physical and chemical processes: ionisation of atomic and molecular hydrogen\, energy loss by elastic and inelastic collisions\, energy deposition by primary and secondary electrons\, gamma-ray production by pion decay\, the production of light elements by spallation reactions\, and much more. Cosmic-ray ionisation activates the rich chemistry of dense molecular clouds and determines the degree of coupling of the gas with the local magnetic field\, which in turn controls the collapse timescale and the star-formation efficiency of a molecular cloud. In recent years a wealth of observations from the ground and from space has provided information and constraints that still need to be incorporated in a consistent global theoretical framework. My goal is to use the results of chemical models and state-of-the-art numerical simulations supplemented by dedicated observations to provide a unifying interpretation of the data with a model of cosmic-ray propagation specifically developed to make predictions that can be tested against the observations. Finally\, I will talk about my most recent study: a mechanism able to accelerate local thermal particles in protostars that can be used to explain the high ionisation rate as well as the synchrotron emission observed towards protostellar sources.
URL:https://www.oa-roma.inaf.it/event/colloquium-marco-padovani-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20181218T114500
DTEND;TZID=Europe/Rome:20181218T124500
DTSTAMP:20260405T014507
CREATED:20180725T070155Z
LAST-MODIFIED:20181210T123509Z
UID:4756-1545133500-1545137100@www.oa-roma.inaf.it
SUMMARY:How to tackle a giant Star: multi-wavelength studies of cool\, evolved stars\, using HST and VLTI
DESCRIPTION:The chemical enrichment of the Universe is considerably affected by the contributions of Giant stars. Giant and supergiant stars are surrounded by a hot layer called the chromosphere\, which could likely powers Magneto-Hydrodynamic Alfven waves that could initiate their mass loss. Toward the end of their life\, on the Asymptotic Giant Branch (AGB)\, stars produce heavy chemical elements\, molecules\, and dust\, which\, through the mass loss provided via their stellar winds\, are placed into the interstellar medium.\nThis talk will explore ongoing work modeling high-resolution spectroscopic observations with Hubble Space Telescope instruments (Rau et al. 2018)\, to reveal the role of the chromosphere in driving K-M giant and supergiant winds. Our results include estimates of wind and chromospheric parameters\, mass-loss rates\, and fundamental stellar parameters.\nIn addition\, ground-based interferometric measurements with high-angular resolution instruments from VLTI\, such as MIDI (Rau et al. 2015\, Rau et al. 2017)\, GRAVITY (Wittkowski\, Rau et al. 2018)\, help to test geometrical and dynamical models describing the behavior of the outer AGB atmospheres at various spatial scales. In this way we are able to unravel the role of molecules and dust in their extended atmospheres.\nFuture plans include the use of high-angular resolution instruments such as VEGA at CHARA\, and MATISSE at VLTI\, to better understand the behavior of cool stars outer atmospheres at various spatial scales.
URL:https://www.oa-roma.inaf.it/event/colloquium-gioia-rau-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20181218T114500
DTEND;TZID=Europe/Rome:20181218T124500
DTSTAMP:20260405T014507
CREATED:20180725T070155Z
LAST-MODIFIED:20180725T070155Z
UID:4170-1545133500-1545137100@www.oa-roma.inaf.it
SUMMARY:colloquium - Gioia Rau
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloquium-gioia-rau/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190115T114500
DTEND;TZID=Europe/Rome:20190115T124500
DTSTAMP:20260405T014507
CREATED:20180922T063208Z
LAST-MODIFIED:20180922T063208Z
UID:4416-1547552700-1547556300@www.oa-roma.inaf.it
SUMMARY:colloqium - Cristina Ramos Almeida
DESCRIPTION:
URL:https://www.oa-roma.inaf.it/event/colloqium-cristina-ramos-almeida/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190115T114500
DTEND;TZID=Europe/Rome:20190115T124500
DTSTAMP:20260405T014507
CREATED:20180922T063208Z
LAST-MODIFIED:20190108T113910Z
UID:4771-1547552700-1547556300@www.oa-roma.inaf.it
SUMMARY:An infrared and sub-mm view of AGN obscuration and feedback
DESCRIPTION:In the past 10-15 years our view of AGN has significantly evolved thanks to the combination of new observations and models. X-ray\, infrared and sub-mm data have been crucial to peer into the inner region of AGN and study the properties of the tori\, circum-nuclear disks and nuclear outflows. In this talk I will summarize our current view of nuclear obscuration in AGN\, focusing on the variations of the torus properties with gas phase. I will also present preliminary results of a new project aimed to characterize nuclear outflows in three gas phases (ionized\, coronal and molecular) in a sample of nearby type-2 quasars and study their impact in the stellar populations\, on-going star formation and molecular gas reservoirs of the galaxies.
URL:https://www.oa-roma.inaf.it/event/colloqium-cristina-ramos-almeida-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190122T114500
DTEND;TZID=Europe/Rome:20190122T124500
DTSTAMP:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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:20260405T014507
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
END:VCALENDAR