The Abundance Pattern of α Elements in the Triangulum–Andromeda Overdensity

The Abundance Pattern of α Elements in the Triangulum–Andromeda Overdensity

The close relationship between the nature of the Triangulum–Andromeda (TriAnd) overdensity and the Galactic disk has become increasingly evident in recent years. However, the chemical pattern of this overdensity ( R GC  = 20–30 kpc) is unique and differs from what we know of the local disk. In this...

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Veröffentlicht in:The Astrophysical journal 2020-09, Vol.901 (1), p.27
Hauptverfasser: Silva, J. V. Sales, Cunha, K., Perottoni, H. D., Rocha-Pinto, H. J., Daflon, S., Almeida-Fernandes, F., Souto, Diogo, Majewski, S. R.
Format: Artikel
Sprache:eng
Schlagworte:
Abundance
Andromeda Galaxy
Astrophysics
Calcium
Dwarf galaxies
Galactic disk
High resolution
Iron
Magnesium
Metallicity
Milky Way
Silicon
Stellar evolution
Stellar populations
Titanium
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Beschreibung
Zusammenfassung:The close relationship between the nature of the Triangulum–Andromeda (TriAnd) overdensity and the Galactic disk has become increasingly evident in recent years. However, the chemical pattern of this overdensity ( R GC  = 20–30 kpc) is unique and differs from what we know of the local disk. In this study, we analyze the chemical abundances of five α elements (Mg, O, Si, Ca, and Ti) in a sample of stars belonging to the TriAnd overdensity, including stars with [Fe/H] 
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/abaaad