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DTSTART:20180325T010000
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DTSTART:20181028T010000
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DTSTART;TZID=Europe/Rome:20190611T114500
DTEND;TZID=Europe/Rome:20190611T124500
DTSTAMP:20260405T142836
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:20260405T142836
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:20260405T142836
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
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20190625T114500
DTEND;TZID=Europe/Rome:20190625T124500
DTSTAMP:20260405T142836
CREATED:20181130T090752Z
LAST-MODIFIED:20190522T150749Z
UID:5043-1561463100-1561466700@www.oa-roma.inaf.it
SUMMARY:Unravelling the Andromeda Galaxy's most important merger
DESCRIPTION:The Andromeda Galaxy (M31)\, our nearest large galactic neighbour\, offers a unique opportunity to test how mergers affect galaxy properties. M31’s stellar halo caused by the tidal disruption of satellite galaxies is the best tracer of the galaxy’s accretion history. Despite a decade of effort in mapping out M31’s large stellar halo\, we are unable to convert M31’s stellar halo into a merger history. Here we use cosmological models of galaxy formation to show that M31’s massive and metal-rich stellar halo containing intermediate age stars implies that it merged with a large (M* ~ 2.5 x 10^10 M_sun) galaxy ~2 Gyr ago. The simulated properties of the merger debris help to interpret a broader set of observations of M31’s stellar halo and satellites than previously considered: its compact and metal-rich satellite M32 is the tidally-stripped core of the disrupted galaxy\, M31’s rotating and flattened inner stellar halo contains most of the merger\ndebris\, and the giant stellar stream is likely to have been thrown out during the merger. This accreted galaxy was the third largest member of the Local Group. This merger may explain the global burst of star formation ~2 Gyr ago in the disk of M31 in which ~1/5 of its stars were formed. Moreover\, M31’s disk and bulge were already in place before its most important merger\, suggesting that mergers of this magnitude do not dramatically affect galaxy structure.
URL:https://www.oa-roma.inaf.it/event/colloquium-alessio-marino/
LOCATION:RM
CATEGORIES:Seminari
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