SIMBAD references

2016ApJ...822L...5M - Astrophys. J., 822, L5-L5 (2016/May-1)

Discovery of an extraordinary number of red supergiants in the inner Galaxy.

MESSINEO M., ZHU Q., MENTEN K.M., IVANOV V.D., FIGER D.F., KUDRITZKI R.-P. and ROSIE CHEN C.-H.

Abstract (from CDS):

In this Letter, we present a search for Galactic red supergiant stars (RSGs) in the direction of the inner Galaxy. A total of 94 targets selected from the 2MASS and GLIMPSE I North catalogs-via their blue extinction-free Q1 and Q2 colors-were spectroscopically observed at infrared wavelengths (in the H- and K-bands at R ∼ 1000), and an extraordinary high detection rate of RSGs ( \gt 61% ) was found. We identified spectroscopically 58 RSGs, based on their flat continua and large equivalent widths of the CO-band at 2.293 µm (EW > 45 Å). This increase corresponds to about 25% of previously known RSGs in the Galactic region 10° < l < 60°, -1.°1 < b < 1.°1. In order to confirm the location of the new RSGs in the inner Galaxy, distances were estimated for a subsample of 47 stars with the clump method and found to range from 3.6 ± 0.4 to 8.6 ± 0.7 kpc. The large new sample will allow us to investigate Galactic metallicity gradients as a function of galactocentric distances and azimuthal angles. Such information is currently an highly disputed issue to constrain models of Galaxy formation and evolution.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): infrared: stars - stars: evolution - supergiants

VizieR on-line data: <Available at CDS (J/ApJ/822/L5): table1.dat>

Nomenclature: Table 1: [MZM2016] NN (Nos 1-94).

Simbad objects: 101

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2020.01.22-12:26:09

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