Unclassified B[e] stars in the MW, SMC and LMC Virtual Observatory Resource

Authors
  1. Condori C.A.H.
  2. Borges Fernandes M.
  3. Kraus M.
  4. Panoglou D.
  5. Guerrero C.A.
  6. Published by
    CDS
Abstract

We investigated 12 unclassified B[e] stars or candidates, 8 from the Galaxy, 2 from the Large Magellanic Cloud (LMC), and 2 from the Small Magellanic Cloud (SMC). Based on the analysis of high-resolution spectroscopic (FEROS) and photometric data, we confirmed the presence of the B[e] phenomenon for all objects of our sample, except for one (IRAS 07455-3143). We derived their effective temperature, spectral type, luminosity class, interstellar extinction and, using the distances from Gaia DR2, we obtained their bolometric magnitude, luminosity, and radius. Modelling of the forbidden lines present in the FEROS spectra revealed information about the kinematics and geometry of the circumstellar medium of these objects. In addition, we analysed the light curves of four stars, finding their most probable periods. The evolutionary stage of 11 stars of our sample is suggested from their position on the HR diagram, taking into account evolutionary tracks of stars with solar, LMC, and SMC metallicities. As results, we identified B and B[e] supergiants, B[e] stars probably at the main sequence or close to its end, post-AGB and HAeB[e] candidates, and A[e] stars in the main sequence or in the pre-main sequence. However, our most remarkable results are the identification of the third A[e] supergiant (ARDB 54, the first one in the LMC), and of an 'LBV impostor' in the SMC (LHA 115-N82).

Keywords
  1. be-stars
  2. emission-line-stars
  3. spectroscopy
  4. visible-astronomy
  5. morgan-keenan-classification
  6. extinction
  7. radial-velocity
  8. line-intensities
  9. effective-temperature
Bibliographic source Bibcode
2019MNRAS.488.1090C
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/488/1090
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/488/1090
Document Object Identifer DOI
doi:10.26093/cds/vizier.74881090

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IVOA Cone Search SCS
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http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/488/1090/table9?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/488/1090/table9?
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History

2023-02-02T12:53:09Z
Resource record created
2023-02-02T12:53:09Z
Created
2024-08-19T20:19:20Z
Updated

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