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X-ORIGINAL-URL:https://www.oa-roma.inaf.it
X-WR-CALDESC:Eventi per Osservatorio Astronomico di Roma
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DTSTART:20150329T010000
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DTSTART:20151025T010000
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DTSTART:20160327T010000
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DTSTART:20161030T010000
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DTSTART:20170326T010000
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DTSTART:20171029T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161004T114500
DTEND;TZID=Europe/Rome:20161004T120000
DTSTAMP:20260404T183241
CREATED:20160713T095906Z
LAST-MODIFIED:20160713T095906Z
UID:4672-1475581500-1475582400@www.oa-roma.inaf.it
SUMMARY:Cosmic rays\, gamma-rays\, and neutrinos from AGN winds
DESCRIPTION:Galaxy scale outflows driven by active galactic nuclei (AGN) are likely to play a key role in the evolution of galaxies. In fact\, they can perturb and possibly expel most of the gas out of the galaxy\, offering a plausible physical origin for the close connection between the properties of black holes and their host galaxies. AGN-driven outflows can also induce shocks in the interstellar medium\, which\, in turn\, can accelerate relativistic particles.\nI will present a study of the non-thermal emissions produced by relativistic particles accelerated by the AGN-driven shocks in  NGC 1068.  NGC 1068 is a nearby prototypical Seyfert 2 galaxy which shows both starburst and nuclear activities in its central region. NGC 1068 is a strong gamma-ray emitter. It is the brightest of the few non-blazar galaxies  detected by the Fermi gamma-ray space telescope.\nI will show the gamma-ray and radio spectra predicted by the AGN outflow model\, and I will discuss how these results compare with those corresponding to other commonly assumed sources of gamma-ray and radio emissions\, like Supernova remnants or AGN jets.\nI will compare the neutrino flux expected in the AGN outflow model with constraints from current experiments\, and I will provide predictions for the detections by the  upcoming KM3NeT neutrino telescope.
URL:https://www.oa-roma.inaf.it/event/cosmic-rays-gamma-rays-and-neutrinos-from-agn-winds-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161004T114500
DTEND;TZID=Europe/Rome:20161004T120000
DTSTAMP:20260404T183241
CREATED:20160713T095906Z
LAST-MODIFIED:20160713T095906Z
UID:1332-1475581500-1475582400@www.oa-roma.inaf.it
SUMMARY:Cosmic rays\, gamma-rays\, and neutrinos from AGN winds
DESCRIPTION:Galaxy scale outflows driven by active galactic nuclei (AGN) are likely to play a key role in the evolution of galaxies. In fact\, they can perturb and possibly expel most of the gas out of the galaxy\, offering a plausible physical origin for the close connection between the properties of black holes and their host galaxies. AGN-driven outflows can also induce shocks in the interstellar medium\, which\, in turn\, can accelerate relativistic particles.\nI will present a study of the non-thermal emissions produced by relativistic particles accelerated by the AGN-driven shocks in  NGC 1068.  NGC 1068 is a nearby prototypical Seyfert 2 galaxy which shows both starburst and nuclear activities in its central region. NGC 1068 is a strong gamma-ray emitter. It is the brightest of the few non-blazar galaxies  detected by the Fermi gamma-ray space telescope.\nI will show the gamma-ray and radio spectra predicted by the AGN outflow model\, and I will discuss how these results compare with those corresponding to other commonly assumed sources of gamma-ray and radio emissions\, like Supernova remnants or AGN jets.\nI will compare the neutrino flux expected in the AGN outflow model with constraints from current experiments\, and I will provide predictions for the detections by the  upcoming KM3NeT neutrino telescope.
URL:https://www.oa-roma.inaf.it/event/cosmic-rays-gamma-rays-and-neutrinos-from-agn-winds/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161011T114500
DTEND;TZID=Europe/Rome:20161011T124500
DTSTAMP:20260404T183241
CREATED:20160725T151446Z
LAST-MODIFIED:20160725T151446Z
UID:4674-1476186300-1476189900@www.oa-roma.inaf.it
SUMMARY:Gamma-ray busrts as probes of high redshift galaxies and their environments
DESCRIPTION:The launch of the Swift mission has revolutionised the study\nof the Gamma-Ray Bursts\, enabling the optical follow-up of the early afterglow.\nThanks to the fast broadcast of the GRB coordinates\nand to the rapid response mode systems built up in 8-meter class\ntelescopes\, these afterglows have be observed from hours down to a few\nminutes after the GRB explosion. The high signal-to noise achievable\nallows us to acquire medium-to-high resolution spectra\, which carry a lot of\ninformation both on the GRB environment and the Inter-Stellar Medium\nof high redshift galaxies. I will give a short review of what we have\nlearned through the medium-to-high resolution spectroscopy of GRB afterglows\,\nmainly with UVES and X-shooter at the VLT.
URL:https://www.oa-roma.inaf.it/event/gamma-ray-busrts-as-probes-of-high-redshift-galaxies-and-their-environments-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161011T114500
DTEND;TZID=Europe/Rome:20161011T124500
DTSTAMP:20260404T183241
CREATED:20160725T151446Z
LAST-MODIFIED:20160725T151446Z
UID:1336-1476186300-1476189900@www.oa-roma.inaf.it
SUMMARY:Gamma-ray busrts as probes of high redshift galaxies and their environments
DESCRIPTION:The launch of the Swift mission has revolutionised the study\nof the Gamma-Ray Bursts\, enabling the optical follow-up of the early afterglow.\nThanks to the fast broadcast of the GRB coordinates\nand to the rapid response mode systems built up in 8-meter class\ntelescopes\, these afterglows have be observed from hours down to a few\nminutes after the GRB explosion. The high signal-to noise achievable\nallows us to acquire medium-to-high resolution spectra\, which carry a lot of\ninformation both on the GRB environment and the Inter-Stellar Medium\nof high redshift galaxies. I will give a short review of what we have\nlearned through the medium-to-high resolution spectroscopy of GRB afterglows\,\nmainly with UVES and X-shooter at the VLT.
URL:https://www.oa-roma.inaf.it/event/gamma-ray-busrts-as-probes-of-high-redshift-galaxies-and-their-environments/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161012T114500
DTEND;TZID=Europe/Rome:20161012T124500
DTSTAMP:20260404T183241
CREATED:20161007T164156Z
LAST-MODIFIED:20161007T164156Z
UID:1748-1476272700-1476276300@www.oa-roma.inaf.it
SUMMARY:Quasars and their host galaxies in the first Gyr of the Universe
DESCRIPTION:Quasars are the brightest (non-transient) objects observed at the highest\nredshifts\, z>7. Such high redshift quasars are important for several\nreasons. Firstly\, detailed analysis of quasar spectra provide unique\ninformation about the baryonic and physical condition of the Universe\nduring the epoch of reionisation.  Furthermore\, the density of high\nredshift quasars puts powerful constraints on the mechanisms that are\nrequired to seed and grow >10^9 Msun supermassive black holes less than a\nGyr after the Big Bang.  Lastly\, as these massive black holes are thought\nto be located in the progenitors of the massive early type galaxies we see\nin the local Universe\, studying the host galaxies of the most distant\nquasars enables us to probe the formation of massive galaxies in the early\nUniverse. \nBecause high redshift quasars are rare\, multi-band surveys covering large\nareas on the sky are required to discover such objects. In this talk I\nwill describe our successful programme aimed at discovering quasars at the\nhighest redshifts in various optical and near-infrared surveys\, such as\nPan-STARRS1\, UKIDSS and VIKING. I will highlight the results of our\nsearch\, which includes the discovery of more than 100 new quasars in the\nfirst Gyr of the Universe. I will describe our on-going multi-wavelength\nfollow-up observations to characterise the distant quasars\, their power\nsource and their environment\, in particular our ALMA programmes to study\nthe galaxies hosting these luminous objects. I will present the results of\nthese observations\, and discuss the implications for massive galaxy and\nblack hole formation at high redshift and our understanding of the\nrelation between the black hole mass and the bulge mass of galaxies.
URL:https://www.oa-roma.inaf.it/event/quasars-and-their-host-galaxies-in-the-first-gyr-of-the-universe/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161012T114500
DTEND;TZID=Europe/Rome:20161012T124500
DTSTAMP:20260404T183241
CREATED:20161007T164156Z
LAST-MODIFIED:20161007T164156Z
UID:4695-1476272700-1476276300@www.oa-roma.inaf.it
SUMMARY:Quasars and their host galaxies in the first Gyr of the Universe
DESCRIPTION:Quasars are the brightest (non-transient) objects observed at the highest\nredshifts\, z>7. Such high redshift quasars are important for several\nreasons. Firstly\, detailed analysis of quasar spectra provide unique\ninformation about the baryonic and physical condition of the Universe\nduring the epoch of reionisation.  Furthermore\, the density of high\nredshift quasars puts powerful constraints on the mechanisms that are\nrequired to seed and grow >10^9 Msun supermassive black holes less than a\nGyr after the Big Bang.  Lastly\, as these massive black holes are thought\nto be located in the progenitors of the massive early type galaxies we see\nin the local Universe\, studying the host galaxies of the most distant\nquasars enables us to probe the formation of massive galaxies in the early\nUniverse. \nBecause high redshift quasars are rare\, multi-band surveys covering large\nareas on the sky are required to discover such objects. In this talk I\nwill describe our successful programme aimed at discovering quasars at the\nhighest redshifts in various optical and near-infrared surveys\, such as\nPan-STARRS1\, UKIDSS and VIKING. I will highlight the results of our\nsearch\, which includes the discovery of more than 100 new quasars in the\nfirst Gyr of the Universe. I will describe our on-going multi-wavelength\nfollow-up observations to characterise the distant quasars\, their power\nsource and their environment\, in particular our ALMA programmes to study\nthe galaxies hosting these luminous objects. I will present the results of\nthese observations\, and discuss the implications for massive galaxy and\nblack hole formation at high redshift and our understanding of the\nrelation between the black hole mass and the bulge mass of galaxies.
URL:https://www.oa-roma.inaf.it/event/quasars-and-their-host-galaxies-in-the-first-gyr-of-the-universe-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161018T114500
DTEND;TZID=Europe/Rome:20161018T124500
DTSTAMP:20260404T183241
CREATED:20160726T135836Z
LAST-MODIFIED:20160726T135836Z
UID:1338-1476791100-1476794700@www.oa-roma.inaf.it
SUMMARY:Ascende superius - Seek higher things - Moving to  higher order statistics in weak lensing
DESCRIPTION:Weak lensing has emerged as one of the most promising tool to constrain\ncosmological parameters and modified gravity theories by measuring second\norder statistical probes such as the cosmic shear two points correlation\nfunction and tomographic power spectra. Thanks to both the wide area and\nlarge redshift range probed\, future surveys will deliver such an exquisite\nquality dataset that it is worth wondering whether one can move to higher\norder statistics. We review here some interesting possibilities showing\nthat they can be recovered with sufficient precision from future data and\nshed further light on the dark energy mystery.
URL:https://www.oa-roma.inaf.it/event/ascende-superius-seek-higher-things-moving-to-higher-order-statistics-in-weak-lensing/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161018T114500
DTEND;TZID=Europe/Rome:20161018T124500
DTSTAMP:20260404T183241
CREATED:20160726T135836Z
LAST-MODIFIED:20160726T135836Z
UID:4675-1476791100-1476794700@www.oa-roma.inaf.it
SUMMARY:Ascende superius - Seek higher things - Moving to  higher order statistics in weak lensing
DESCRIPTION:Weak lensing has emerged as one of the most promising tool to constrain\ncosmological parameters and modified gravity theories by measuring second\norder statistical probes such as the cosmic shear two points correlation\nfunction and tomographic power spectra. Thanks to both the wide area and\nlarge redshift range probed\, future surveys will deliver such an exquisite\nquality dataset that it is worth wondering whether one can move to higher\norder statistics. We review here some interesting possibilities showing\nthat they can be recovered with sufficient precision from future data and\nshed further light on the dark energy mystery.
URL:https://www.oa-roma.inaf.it/event/ascende-superius-seek-higher-things-moving-to-higher-order-statistics-in-weak-lensing-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161025T114500
DTEND;TZID=Europe/Rome:20161025T124500
DTSTAMP:20260404T183241
CREATED:20160906T124921Z
LAST-MODIFIED:20160906T124921Z
UID:1356-1477395900-1477399500@www.oa-roma.inaf.it
SUMMARY:Swinging between accretion and rotation power in binary millisecond pulsars
DESCRIPTION:Neutron stars in low mass X-ray binaries are spun-up to millisecond spin periods during a Gyr-long phase of accretion of the matter transferred by a companion star. When the rate of mass transfer decreases at the end of this Gyr-long X-ray bright phase\, a radio pulsar powered by the rotation of the neutron star magnetic field turns on. After decades of searches\,  the evolutionary link between these two classes of sources has been recently proven by the discovery of three sources that were observed to swing between accretion (X-ray bright) and rotation (radio bright) pulsar behaviour. These sources are the prototype of a new class of transitional systems that alternate between accretion and rotation-powered states in response to variations of the rate of mass in-flow\, on time scales as short as a couple of weeks. Observations of this and other similar systems indicate that transitions to the accretion phase not only involve bright X-ray outbursts\, but also a fainter intermediate X-ray state\, possibly caused by centrifugal inhibition and ejection of the matter flow. Transitional ms pulsars are ideal test beds for theories describing the accretion-ejection coupling around a fast magnetized rotator\, as well as the evolution of old binary systems. I will review the main observed properties\, the prospects of catching more state transitions\, and the possibilities to fully exploit the unique observable features of this newly established class.
URL:https://www.oa-roma.inaf.it/event/swinging-between-accretion-and-rotation-power-in-binary-millisecond-pulsars/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161025T114500
DTEND;TZID=Europe/Rome:20161025T124500
DTSTAMP:20260404T183241
CREATED:20160906T124921Z
LAST-MODIFIED:20160906T124921Z
UID:4680-1477395900-1477399500@www.oa-roma.inaf.it
SUMMARY:Swinging between accretion and rotation power in binary millisecond pulsars
DESCRIPTION:Neutron stars in low mass X-ray binaries are spun-up to millisecond spin periods during a Gyr-long phase of accretion of the matter transferred by a companion star. When the rate of mass transfer decreases at the end of this Gyr-long X-ray bright phase\, a radio pulsar powered by the rotation of the neutron star magnetic field turns on. After decades of searches\,  the evolutionary link between these two classes of sources has been recently proven by the discovery of three sources that were observed to swing between accretion (X-ray bright) and rotation (radio bright) pulsar behaviour. These sources are the prototype of a new class of transitional systems that alternate between accretion and rotation-powered states in response to variations of the rate of mass in-flow\, on time scales as short as a couple of weeks. Observations of this and other similar systems indicate that transitions to the accretion phase not only involve bright X-ray outbursts\, but also a fainter intermediate X-ray state\, possibly caused by centrifugal inhibition and ejection of the matter flow. Transitional ms pulsars are ideal test beds for theories describing the accretion-ejection coupling around a fast magnetized rotator\, as well as the evolution of old binary systems. I will review the main observed properties\, the prospects of catching more state transitions\, and the possibilities to fully exploit the unique observable features of this newly established class.
URL:https://www.oa-roma.inaf.it/event/swinging-between-accretion-and-rotation-power-in-binary-millisecond-pulsars-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
END:VCALENDAR