LMC SAGE. New variable evolved stars and YSOs Virtual Observatory Resource

Authors
  1. Vijh U.P.
  2. Meixner M.
  3. Babler B.
  4. Block M.
  5. Bracker S.
  6. Engelbracht C.W.,For B.
  7. Gordon K.
  8. Hora J.
  9. Indebetouw R.
  10. Leitherer C.
  11. Meade M.,Misselt K.
  12. Sewilo M.
  13. Srinivasan S.
  14. Whitney B.
  15. Published by
    CDS
Abstract

We present initial results and source lists of variable sources in the Large Magellanic Cloud (LMC) for which we detect thermal infrared variability from the Surveying the Agents of a Galaxy's Evolution (SAGE) survey, which had two epochs of photometry separated by 3 months. The SAGE survey mapped a 7{deg}x7{deg} region of the LMC using the Infrared Array Camera (IRAC) and the MIPS instruments on board Spitzer. Variable sources are identified using a combination of the IRAC 3.6, 4.5, 5.8, 8.0um bands and the MIPS 24um bands. An error-weighted flux difference between the two epochs is used to assess the variability. Of the ~3 million sources detected at both epochs, we find ~2000 variable sources for which we provide electronic catalogs. Most of the variable sources can be classified as asymptotic giant branch (AGB) stars. A large fraction (>66%) of the extreme AGB stars are variable and only smaller fractions of carbon-rich (6.1%) and oxygen-rich (2.0%) stars are detected as variable sources. We also detect a population of variable young stellar object candidates.

Keywords
  1. magellanic-clouds
  2. infrared-sources
  3. infrared-photometry
Bibliographic source Bibcode
2009AJ....137.3139V
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/137/3139
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/137/3139
Document Object Identifer DOI
doi:10.26093/cds/vizier.51373139

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https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/137/3139/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/137/3139/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/137/3139/table2?

History

2011-10-04T13:51:40Z
Resource record created
2011-10-04T13:51:40Z
Created
2017-12-07T07:26:56Z
Updated

Contact

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