2021ApJ...914..100D

Query : 2021ApJ...914..100D

2021ApJ...914..100D - Astrophys. J., 914, 100-100 (2021/June-3)

Two populations of carbon-enhanced metal-poor stars in the disk system of the Milky Way.

DIETZ S.E., YOON J., BEERS T.C., PLACCO V.M. and SUN LEE Y.

Abstract (from CDS):

We present a chemodynamical analysis of low-resolution (R ∼ 1300) spectroscopy of ∼50,000 stars from the AAOmega Evolution of Galactic Structure survey, focusing on two key populations of (in total) 650 carbon-enhanced metal-poor (CEMP) stars within the disk system of the Milky Way: a mildly prograde population (Lz < 1000 kpc km s–1) and a strongly prograde population (Lz > 1000 kpc km s–1). Based on their chemical and kinematic characteristics, and on comparisons with similar populations found in the recent literature, we tentatively associate the former with an ex situ inner-halo population originating from either the Gaia Sausage or Gaia-Enceladus. The latter population is linked to the metal-weak thick disk. We discuss their implications in the context of the formation history of the Milky Way.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Milky Way disk - Milky Way evolution - Milky Way formation - CEMP stars - Stellar kinematics

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Gaia Enceladus-Sausage St* ~ ~           ~ 860 0

Query : 2021ApJ...914..100D

Basic data :
NAME Gaia Enceladus-Sausage -- Stellar Stream
Other object types: otypes_help 		St* (), G (2018Natur)
ICRS coord. (ep=J2000) : 		No Coord.

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 187 		Display criteria :

Identifiers (8) :
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NAME Gaia-Enceladus NAME Gaia Enceladus-Sausage
NAME Gaia Sausage-Enceladus NAME Gaia Sausage

References (860 between 1850 and 2026) (Total 860)
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