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DTSTART;TZID=Europe/Rome:20161122T114500
DTEND;TZID=Europe/Rome:20161122T124500
DTSTAMP:20260427T114208
CREATED:20160801T142752Z
LAST-MODIFIED:20160801T142752Z
UID:1350-1479815100-1479818700@www.oa-roma.inaf.it
SUMMARY:A hard X-ray view of non-local AGNs
DESCRIPTION:The Cosmic X-ray Background (CXB) provides a record of cosmic accretion history\nonto actively accreting supermassive black holes. The direct resolution of the\nCXB into discrete sources can therefore provide a census of AGN populations\nacross cosmic time.\nPopulation synthesis models are able to explain the CXB as mixture of AGN\npopulations with different luminosities and obscuration degree provided a\nconsistent population of heavily obscured AGN\, called Compton Thick (CT)\,\nexpected to contribute significantly (20-30%) to the CXB peak at 20-30 keV\, is\npostulated. Unfortunately\, several parameter degeneracies in the modelings at\nenergies > 10 keV result in an order of magnitude uncertainty in the estimation\nof the fraction of CT AGN. Furthermore\, the direct detection of these sources at\n 10 keV\,\nis capable of resolving a sizable part (>~ 30%) of the CXB at energies around\nits peak of emissivity and of obtaining a direct and almost unobscured view of\nobscured AGN up to z~3 therefore starting to address the main concerns in the\nmodelings of the CXB.  In this regard I will report on the first spectral\ncharacterization of these AGN populations\, through broad-band (0.5-24 keV)\nspectral analysis of a hard-band selected sample of AGN from the NuSTAR survey\nprogram.
URL:https://www.oa-roma.inaf.it/event/the-nustar-view-of-non-local-agns/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20161122T114500
DTEND;TZID=Europe/Rome:20161122T124500
DTSTAMP:20260427T114208
CREATED:20160801T142752Z
LAST-MODIFIED:20160801T142752Z
UID:4679-1479815100-1479818700@www.oa-roma.inaf.it
SUMMARY:A hard X-ray view of non-local AGNs
DESCRIPTION:The Cosmic X-ray Background (CXB) provides a record of cosmic accretion history\nonto actively accreting supermassive black holes. The direct resolution of the\nCXB into discrete sources can therefore provide a census of AGN populations\nacross cosmic time.\nPopulation synthesis models are able to explain the CXB as mixture of AGN\npopulations with different luminosities and obscuration degree provided a\nconsistent population of heavily obscured AGN\, called Compton Thick (CT)\,\nexpected to contribute significantly (20-30%) to the CXB peak at 20-30 keV\, is\npostulated. Unfortunately\, several parameter degeneracies in the modelings at\nenergies > 10 keV result in an order of magnitude uncertainty in the estimation\nof the fraction of CT AGN. Furthermore\, the direct detection of these sources at\n 10 keV\,\nis capable of resolving a sizable part (>~ 30%) of the CXB at energies around\nits peak of emissivity and of obtaining a direct and almost unobscured view of\nobscured AGN up to z~3 therefore starting to address the main concerns in the\nmodelings of the CXB.  In this regard I will report on the first spectral\ncharacterization of these AGN populations\, through broad-band (0.5-24 keV)\nspectral analysis of a hard-band selected sample of AGN from the NuSTAR survey\nprogram.
URL:https://www.oa-roma.inaf.it/event/the-nustar-view-of-non-local-agns-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
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