LAMOST parameters for 188 white dwarfs Virtual Observatory Resource

Authors
  1. Wang K.
  2. Nemeth P.
  3. Luo Y.
  4. Chen X.
  5. Jiang Q.
  6. Cao X.
  7. Published by
    CDS
Abstract

We present the first results from our ongoing project to study extremely low-mass (ELM) white dwarfs (WDs) (M<~0.3M{sun}) with the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) spectra. Based on the LAMOST DR8 spectral database, we analyzed 136 ELM WD candidates selected from Gaia DR2 data and 12 known objects previously identified by the ELM Survey. The atmospheric parameters and radial velocities of these stars were obtained by fitting the LAMOST low-resolution spectra. After comparing the atmospheric parameters of the 12 known objects from this work to the results reported by the ELM Survey, we demonstrated the potential of LAMOST spectra in probing into the nature of ELM WDs. Based on the atmospheric parameters and Gaia EDR3 data, we identified 21 new high-probability ELM WDs with masses M<~0.3M{sun} and parallax estimates that agree to within a factor of 3. Two of them, J0338+4134 and J1129+4715, show significant radial velocity variability and are very likely to be binary systems containing at least one ELM WD.

Keywords
  1. white-dwarf-stars
  2. visible-astronomy
  3. spectroscopy
  4. effective-temperature
  5. radial-velocity
  6. stellar-masses
  7. stellar-radii
Bibliographic source Bibcode
2022ApJ...936....5W
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/936/5
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/936/5
Document Object Identifer DOI
doi:10.26093/cds/vizier.19360005

Access

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/936/5
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/936/5
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/936/5
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https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/936/5/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/936/5/table1?
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http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/936/5/table2?
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https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/936/5/table3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/936/5/table3?

History

2024-07-02T07:32:10Z
Resource record created
2024-07-02T07:32:10Z
Created
2024-11-06T20:27:21Z
Updated

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
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