Fraction of bulge metal poor & metal rich stars : J/A+A/618/A147

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Authors : Zoccali M. orcid , Valenti E., Gonzalez O.A. (hide) , Valenti E., Gonzalez O.A. et..al

VizieR DOI : 10.26093/cds/vizier.36180147
Bibcode : 2018A&A...618A.147Z (ADS) (Simbad) (Objects)
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CDS Keywords : Milky Way; Stellar distribution
UAT : Milky Way Galaxy

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Inserted into VizieR : 25-Oct-2018
Last modification : 18-Apr-2019

Weighing the two stellar components of the Galactic bulge. (2018)

Keywords : Galaxy bulge - Galaxy: formation - Galaxy: stellar content - Galaxy: structure

Abstract:Recent spectroscopic surveys of the Galactic bulge have unambiguously shown that the bulge contains two main components, which are best separated by their iron content, but also differ in spatial distribution, kinematics, and abundance ratios. The so-called metal poor component peaks at [Fe/H]~-0.4, while the metal rich component peaks at [Fe/H]~+0.3. The total metallicity distribution function is therefore bimodal with a dip at [Fe/H]~0. The relative fraction of the two components changes significantly across the bulge area. We provide, for the first time, the fractional contribution of the ...(more)
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Astronomy and Astrophysics policies
Percent contribution of metal poor and metal rich stars to the bulge stellar mass, in the region -10<l<10, -10
Manuela Zoccali, mzoccali(at)astro.puc.cl

                


                

                    

                


                

                    

                


                

                    
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