BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Osservatorio Astronomico di Roma - ECPv6.16.2//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
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
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Rome
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20160327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20161030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20170326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20171029T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20180325T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20181028T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20170110T114500
DTEND;TZID=Europe/Rome:20170110T124500
DTSTAMP:20260515T020052
CREATED:20161005T041307Z
LAST-MODIFIED:20161005T041307Z
UID:1730-1484048700-1484052300@www.oa-roma.inaf.it
SUMMARY:Radial metallicity gradients of disk galaxies: The emission-line probes
DESCRIPTION:The metallicity of stellar and interstellar probes thorough disk galaxies\, including our own\, is distributed non-uniformly\, showing typically shallow radial metallicity gradients where the metallicity decreases radially\, inside out.  Ultimately\, the chemical evolution models need to be constrained by observations to determine the existence and extent of gradient slope and evolution\, which in turn are linked to the formation and evolution of the galaxy.\nThe use of emission-line probes to test metallicity gradients takes advantage of the brightness of the nebular emission lines\, and of the fact that the two major nebular probes\, planetary nebulae (PNe) and HII regions\, probe different epochs since galaxy formation. The limitation is that direct abundances are within observational reach only in the Local Universe.  On the Galactic side\, additional complications are added to the problem by the uncertainty of the PN distance scale.\nIn this talk I review the radial metallicity gradients background and main observational results\, the latest direct metallicity gradient determinations in the Galaxy and beyond\, the Gaia solution to the PN distance problem\, and the foreseen advances of this field with the next generation of observational capabilities.
URL:https://www.oa-roma.inaf.it/event/seminario-letizia-stanghellini/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Rome:20170110T114500
DTEND;TZID=Europe/Rome:20170110T124500
DTSTAMP:20260515T020052
CREATED:20161005T041307Z
LAST-MODIFIED:20161005T041307Z
UID:4692-1484048700-1484052300@www.oa-roma.inaf.it
SUMMARY:Radial metallicity gradients of disk galaxies: The emission-line probes
DESCRIPTION:The metallicity of stellar and interstellar probes thorough disk galaxies\, including our own\, is distributed non-uniformly\, showing typically shallow radial metallicity gradients where the metallicity decreases radially\, inside out.  Ultimately\, the chemical evolution models need to be constrained by observations to determine the existence and extent of gradient slope and evolution\, which in turn are linked to the formation and evolution of the galaxy.\nThe use of emission-line probes to test metallicity gradients takes advantage of the brightness of the nebular emission lines\, and of the fact that the two major nebular probes\, planetary nebulae (PNe) and HII regions\, probe different epochs since galaxy formation. The limitation is that direct abundances are within observational reach only in the Local Universe.  On the Galactic side\, additional complications are added to the problem by the uncertainty of the PN distance scale.\nIn this talk I review the radial metallicity gradients background and main observational results\, the latest direct metallicity gradient determinations in the Galaxy and beyond\, the Gaia solution to the PN distance problem\, and the foreseen advances of this field with the next generation of observational capabilities.
URL:https://www.oa-roma.inaf.it/event/seminario-letizia-stanghellini-2/
LOCATION:Aula Gratton
CATEGORIES:Seminari
END:VEVENT
END:VCALENDAR