SIMBAD references

2017ApJ...836...65M - Astrophys. J., 836, 65-65 (2017/February-2)

Red supergiants in the inner Galaxy: stellar properties.

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

Abstract (from CDS):

Red supergiants (RSGs) are luminous cool stars detectable in disks of distant spirals. About a thousand are known in the Galaxy. Here, we analyze a sample of late-type stars recently observed by Messineo et al. in the inner Galaxy (10l60). A total of 58 targets (25% of previously known RSGs) were reported as supergiants based on their large equivalent widths of the CO band-head at 2.293 µm (EWs > 45 A, >=M0I). In this work, luminosities are estimated with infrared measurements and distance moduli for 47 spectroscopically classified RSGs; they range from 3.2×104 to 1.3×105L. Six other RSGs with smaller EW(CO)s are classified according to their luminosities. Using a prescription based on Ks–[W4], moderate mass-loss rates from 10–8 to 10–6.5M yr–1 are inferred. In addition, we report on H and K spectra of 26 stars at R = 1500-2200. EWs of the CO at 2.293 and 1.620 µm, and of atomic lines, are consistent with those of nearby RSGs, within uncertainties. Mg I appears to be a useful diagnostic to confirm RSGs at R = 1500-2200. RSG #66 is a member of the cluster Alicante 7. Star #92 is projected onto the overdensity #495 of Camargo et al., but our analysis suggests they are unrelated. Remaining targets are isolated from other known RSGs within ≃3'.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

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

Nomenclature: Table 8: [MZM2016] NNN (Nos 95-123) added.

Simbad objects: 132

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2020.01.18-15:22:51

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