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X-WR-CALDESC:Eventi per Osservatorio Astronomico di Roma
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DTSTART:20180325T010000
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DTSTART:20181028T010000
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DTSTART:20190331T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190507T114500
DTEND;TZID=Europe/Rome:20190507T124500
DTSTAMP:20260407T081503
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:20260407T081503
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:20260407T081503
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:20260407T081503
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:20260407T081503
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
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