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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20150730T103000
DTEND;TZID=Atlantic/Canary:20150730T113000
UID:iactalks-803
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/803
CREATED:2015-07-30T10:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:The last asymptotic giant branch star
DESCRIPTION:The last asymptotic giant branch star\nDr. Maria Lugaro\n\nAll 
 the elements from carbon to uranium present in the Solar System were produ
 ced by hundreds to thousands of stars belonging to different stellar gener
 ations that evolved and died during the presolar evolution of the Galaxy. 
 Using the abundances of radioactive nuclei inferred from meteoritic analys
 is we can date the last of these stellar additions. We have found that the
  last contribution of elements such as carbon and slow neutron-capture ele
 ments to the Solar System from an asymptotic giant branch star occurred 15
 -30 Myr before the formation of the Sun. This provides us with an upper li
 mit of the time when the precursor material of the Solar System became iso
 lated from the bulk of the galactic material. Interestingly, it compares w
 ell to the lifetime of high-mass molecular clouds suggesting that the Sun 
 was born in a very large family of stars.
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