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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20190115T103000
DTEND;TZID=Atlantic/Canary:20190115T113000
UID:iactalks-1204
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/1204
CREATED:2019-01-15T10:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Unusual abundance patterns across the Milky Way: Evident signatures
  of dissolving GC stars
DESCRIPTION:Unusual abundance patterns across the Milky Way: Evident signat
 ures of dissolving GC stars\nDr. J. G. Fernández-Trincado\n\nAPOGEE conta
 ins more than hundred thousands new giant stars. This enabled us to collec
 ted an unprecedented and homogeneous sample of giant stars with light-elem
 ent abundance variations similar to observed in “ *second-generation
 *” globular cluster stars. If they are really former members of diss
 olved globular clusters, stars in these groups should show some of the bas
 ic SG-like chemical patterns known for stars currently belonging to the Mi
 lky Way globular clusters, such as depletion in C and O together with N an
 d Al enrichments. Here, I will present the results of an updated census of
  *SG-like* stars from a near-infrared manual analysis using the Brussels A
 utomatic Stellar Parameter (BACCHUS) code to provide the abundances of C, 
 N, O, Mg, Si, Al, Fe, Ce and Nd for every line of possible cluster member 
 stars, which they migrate to the disk, halo and bulge as unbound stars, an
 d become part of the general stellar population of the Milky Way. By combi
 ning wide-field time-series photometry with APOGEE-2S spectroscopy data, w
 e are in a good position to put the big picture together. The VVV survey h
 ave produced a large variability dataset towards the Milky Way bulge and d
 isk, including data in the near-IR (J and Ks). These data will allow us to
  place constraints on the “polluters" that are responsible for the c
 hemical peculiarities, with candidates including TP-AGB stars, binary mass
  transfer, accretion of material from the winds of AGB stars, etc.  A
  cross match between VVV sources and APOGEE targets is ongoing.
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