2020ApJ...900..138A

Query : 2020ApJ...900..138A

2020ApJ...900..138A - Astrophys. J., 900, 138-138 (2020/September-2)

Analysis of red supergiants in VDBH 222.

ASA'D R., KOVALEV M., DAVIES B., IVANOV V.D., REJKUBA M., GONNEAU A., HERNANDEZ S., LARDO C. and BERGEMANN M.

Abstract (from CDS):

Recent surveys uncovered new young massive clusters (YMCs) that host dozens of red supergiants (RSGs) in the inner Milky Way. These clusters are ideal for studying the most recent and violent star formation events in the inner Galaxy. However, due to the high extinction that affects the Galactic plane, they need to be studied through infrared (IR) spectroscopy. IR spectra of RSGs have proven to be powerful tools for obtaining chemical abundances. We present the first [Fe/H] measurement (-0.07 ± 0.02) for the YMC VdBH 222 through analysis of its RSGs using Very Large Telescope/X-shooter spectra. We find no evidence for multiple stellar populations in this YMC, contrary to what is routinely observed in older massive clusters.

Abstract Copyright: © 2020. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Star clusters - Red supergiant stars - Chemical abundances

Nomenclature: Table 1: [AKD2020] OB22669NN N=6 among (Nos 28-61).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 Cl VDBH 222 OpC 17 18 46.6 -38 17 20           ~ 28 0
2 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14521 0

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