Analysis of Red Supergiants in VDBH 222

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 pla...

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Bibliographic Details
Published in:The Astrophysical journal 2020-09, Vol.900 (2), p.138
Main Authors: Asa'd, Randa, Kovalev, M., Davies, B., Ivanov, V. D., Rejkuba, M., Gonneau, A., Hernandez, S., Lardo, C., Bergemann, M.
Format: Article
Language:English
Subjects:
Astrophysics
Chemical abundances
Galaxies
Infrared spectra
Infrared spectroscopy
Milky Way
Red giant stars
Red supergiant stars
Spectroscopy
Spectrum analysis
Star & galaxy formation
Star clusters
Star formation
Stellar populations
Supergiant stars
Very Large Telescope
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Summary: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.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aba439