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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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TZID:Europe/Rome
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DTSTART:20150329T010000
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DTSTART:20151025T010000
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DTSTART:20160327T010000
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DTSTART:20170326T010000
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DTSTART:20171029T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20160609T114500
DTEND;TZID=Europe/Rome:20160609T124500
DTSTAMP:20260405T102429
CREATED:20160506T044143Z
LAST-MODIFIED:20160506T044143Z
UID:1130-1465472700-1465476300@www.oa-roma.inaf.it
SUMMARY:The two-families scenario of compact stars: signatures and implications on GRBs
DESCRIPTION:In the last years the possibility of discriminating between the various theoretically possible compositions of a compact “neutron” star has become more and more convincing and it is based on the measure of a few fundamental quantities\, such as the radii (NICER\, LOFT)\, the moment of inertia (SKA) and/or the gravitational wave signal before and after the merging of two compact stars (VIRGO\, LIGO).\nI will outline the so-called two-families scenario in which both stars having very small radii (of the order of about 10.5 km) and stars having very large masses (of the order or larger than about 2 Ms) can exist. In that scenario very dense stars\, having small radii\, are made of neutron\, protons\, hyperons and other hadronic resonances\, while the most massive stars are strange-quark stars\, i.e. objects entirely made of deconfined quark matter. I will discuss the implications of the two-families scenario on short and long Gamma Ray Bursts within the proto-magnetar model of GRBs\, showing that quark deconfinement can be responsible both of the rapid termination of the prompt emission in short GRBs and of late time activity in long GRBs.
URL:https://www.oa-roma.inaf.it/event/the-two-families-scenario-of-compact-stars-signatures-and-implications-on-grbs/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20160609T114500
DTEND;TZID=Europe/Rome:20160609T124500
DTSTAMP:20260405T102429
CREATED:20160506T044143Z
LAST-MODIFIED:20160506T044143Z
UID:4669-1465472700-1465476300@www.oa-roma.inaf.it
SUMMARY:The two-families scenario of compact stars: signatures and implications on GRBs
DESCRIPTION:In the last years the possibility of discriminating between the various theoretically possible compositions of a compact “neutron” star has become more and more convincing and it is based on the measure of a few fundamental quantities\, such as the radii (NICER\, LOFT)\, the moment of inertia (SKA) and/or the gravitational wave signal before and after the merging of two compact stars (VIRGO\, LIGO).\nI will outline the so-called two-families scenario in which both stars having very small radii (of the order of about 10.5 km) and stars having very large masses (of the order or larger than about 2 Ms) can exist. In that scenario very dense stars\, having small radii\, are made of neutron\, protons\, hyperons and other hadronic resonances\, while the most massive stars are strange-quark stars\, i.e. objects entirely made of deconfined quark matter. I will discuss the implications of the two-families scenario on short and long Gamma Ray Bursts within the proto-magnetar model of GRBs\, showing that quark deconfinement can be responsible both of the rapid termination of the prompt emission in short GRBs and of late time activity in long GRBs.
URL:https://www.oa-roma.inaf.it/event/the-two-families-scenario-of-compact-stars-signatures-and-implications-on-grbs-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20160614T114500
DTEND;TZID=Europe/Rome:20160614T124500
DTSTAMP:20260405T102429
CREATED:20160425T071635Z
LAST-MODIFIED:20160425T071635Z
UID:1124-1465904700-1465908300@www.oa-roma.inaf.it
SUMMARY:Stellar evolution modeling of low-mass stars with magnetic fields: advances and challenges
DESCRIPTION:Though magnetic fields are commonly believed to play an important role\non the structure and evolution of stars\, there have been few attempts so\nfar to include their effects on stellar evolution models. Specifically\nin the case of low-mass stars\, those effects could account for some\ndisparities between standard stellar models predictions and\nobservations\, such as their radii and effective temperatures. In this\ntalk I will briefly review the modeling techniques for considering the\nmagnetic field effects on 1-D evolution codes\, and also present some\nrecent results of those techniques as implemented in the ATON stellar\nevolution code. Some theoretical and observational challenges to those\nresults will also be highlighted.
URL:https://www.oa-roma.inaf.it/event/stellar-evolution-modeling-of-low-mass-stars-with-magnetic-fields-advances-and-challenges/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20160614T114500
DTEND;TZID=Europe/Rome:20160614T124500
DTSTAMP:20260405T102429
CREATED:20160425T071635Z
LAST-MODIFIED:20160425T071635Z
UID:4668-1465904700-1465908300@www.oa-roma.inaf.it
SUMMARY:Stellar evolution modeling of low-mass stars with magnetic fields: advances and challenges
DESCRIPTION:Though magnetic fields are commonly believed to play an important role\non the structure and evolution of stars\, there have been few attempts so\nfar to include their effects on stellar evolution models. Specifically\nin the case of low-mass stars\, those effects could account for some\ndisparities between standard stellar models predictions and\nobservations\, such as their radii and effective temperatures. In this\ntalk I will briefly review the modeling techniques for considering the\nmagnetic field effects on 1-D evolution codes\, and also present some\nrecent results of those techniques as implemented in the ATON stellar\nevolution code. Some theoretical and observational challenges to those\nresults will also be highlighted.
URL:https://www.oa-roma.inaf.it/event/stellar-evolution-modeling-of-low-mass-stars-with-magnetic-fields-advances-and-challenges-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20160630T114500
DTEND;TZID=Europe/Rome:20160630T124500
DTSTAMP:20260405T102429
CREATED:20160425T070945Z
LAST-MODIFIED:20160425T070945Z
UID:1123-1467287100-1467290700@www.oa-roma.inaf.it
SUMMARY:The Milky Way bulge: chemical content\, kinematics and 3D structure
DESCRIPTION:During the last decade large observational efforts have been focused on understanding the formation and evolution of the Milky Way bulge by studying the spectroscopic and photometric properties of its stellar population over large and unexplored regions.\nThe emerging picture is substantially different from what previously thought and by far more complicated.\nI will review the results obtained by the recent surveys focusing in particular on the observational evidences concerning the Bulge chemical content\, kinematics and 3D structure.
URL:https://www.oa-roma.inaf.it/event/the-milky-way-bulge-chemical-content-kinematics-and-3d-structure/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20160630T114500
DTEND;TZID=Europe/Rome:20160630T124500
DTSTAMP:20260405T102429
CREATED:20160425T070945Z
LAST-MODIFIED:20160425T070945Z
UID:4667-1467287100-1467290700@www.oa-roma.inaf.it
SUMMARY:The Milky Way bulge: chemical content\, kinematics and 3D structure
DESCRIPTION:During the last decade large observational efforts have been focused on understanding the formation and evolution of the Milky Way bulge by studying the spectroscopic and photometric properties of its stellar population over large and unexplored regions.\nThe emerging picture is substantially different from what previously thought and by far more complicated.\nI will review the results obtained by the recent surveys focusing in particular on the observational evidences concerning the Bulge chemical content\, kinematics and 3D structure.
URL:https://www.oa-roma.inaf.it/event/the-milky-way-bulge-chemical-content-kinematics-and-3d-structure-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
END:VCALENDAR