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A wide angle chemical survey of the Sagittarius dwarf Spheroidal galaxy

Published online by Cambridge University Press:  30 October 2019

L. Sbordone Open the ORCID record for L. Sbordone [Opens in a new window] ,
L. Monaco ,
S. Duffau ,
P. Bonifacio  and
E. Caffau
L. Sbordone
Affiliation:
ESO - European Southern Observatory Alonso de Cordova 3104, Vitacura, Santiago,Chile email: lsbordon@eso.org
L. Monaco
Affiliation:
Departamento de Ciencias Fisicas, Universidad Andres Bello, Fernandez Concha 700, Las Condes, Santiago, Chile
S. Duffau
Affiliation:
Departamento de Ciencias Fisicas, Universidad Andres Bello, Fernandez Concha 700, Las Condes, Santiago, Chile
P. Bonifacio
Affiliation:
Observatoire de Paris, PSL University, CNRS, GEPI, Place Jules Janssen, 92195, Meudon, France
E. Caffau
Affiliation:
Observatoire de Paris, PSL University, CNRS, GEPI, Place Jules Janssen, 92195, Meudon, France
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Abstract

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We present the status of an ongoing project to map the detailed chemical abundances of stars across the main body of the Sagittarius dwarf Spheroidal galaxy (Sgr dSph). The Sgr dSph is the closest known dwarf galaxy, and is being tidally destroyed by its interaction with the Milky Way (MW), leaving behind a massive stellar stream. Sgr dSph is a chemically outstanding object, with peculiar abundance ratios, clear center-outskirts abundance gradients, and spanning more than 3 orders of magnitude in metallicity. We present here detailed abundances from UVES@VLT spectra for more than 50 giants across 8 fields along the major and minor axes of Sgr dSph, and 5 more outside the galaxy main body, but possibly associated to its stellar stream.

Keywords

galaxies: abundancesgalaxies: dwarf(galaxies:) Local GroupGalaxy: haloGalaxy: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 42 - 45
Copyright
© International Astronomical Union 2019 

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