Yellow and red supergiants in the LMC Virtual Observatory Resource

Authors
  1. Neugent K.F.
  2. Massey P.
  3. Skiff B.
  4. Meynet G.
  5. Published by
    CDS
Abstract

Due to their transitionary nature, yellow supergiants (YSGs) provide a critical challenge for evolutionary modeling. Previous studies within M31 and the Small Magellanic Cloud show that the Geneva evolutionary models do a poor job at predicting the lifetimes of these short-lived stars. Here, we extend this study to the Large Magellanic Cloud (LMC) while also investigating the galaxy's red supergiant (RSG) content. This task is complicated by contamination by Galactic foreground stars that color and magnitude criteria alone cannot weed out. Therefore, we use proper-motions and the LMC's large systemic radial velocity (~278km/s) to separate out these foreground dwarfs. After observing nearly 2000 stars, we identified 317 probable YSGs, 6 possible YSGs, and 505 probable RSGs. Foreground contamination of our YSG sample was ~80%, while that of the RSG sample was only 3%. By placing the YSGs on the Hertzsprung-Russell diagram and comparing them against the evolutionary tracks, we find that new Geneva evolutionary models do an exemplary job at predicting both the locations and the lifetimes of these transitory objects.

Keywords
  1. magellanic-clouds
  2. giant-stars
  3. radial-velocity
  4. stellar-spectral-types
  5. infrared-astronomy
  6. spectroscopy
  7. astronomical-object-identification
Bibliographic source Bibcode
2012ApJ...749..177N
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/749/177
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/749/177
Document Object Identifer DOI
doi:10.26093/cds/vizier.17490177

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/749/177
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/749/177
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/749/177
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http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/749/177/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/749/177/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/749/177/table2?
IVOA Cone Search SCS
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http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/749/177/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/749/177/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/749/177/table1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/749/177/table3?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/749/177/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/749/177/table3?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/749/177/table4?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/749/177/table4?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/749/177/table4?

History

2014-01-15T11:41:08Z
Resource record created
2014-01-15T11:41:08Z
Created
2019-08-21T11:07:14Z
Updated

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr