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Peer-reviewedCC BY 4.0Monthly Notices of the Royal Astronomical Society

Spectroscopy of TESS- selected hot variable stars

  • H L Worters1
  • D Kilkenny2
  • P Németh3
  • A S Baran4
  • R H Østensen5
5 affiliations
  1. 1South African Astronomical Observatory , P.O. Box 9, Observatory, 7935 Cape Town ,
  2. 2Department of Physics & Astronomy, University of the Western Cape , Private Bag X17, Bellville 7535 ,
  3. 3Astroserver.org , Fő tér 1, 8533 Malomsok ,
  4. 4ARDASTELLA Research Collaboration, Department of Physics, Astronomy, and Materials Science, Missouri State University , Springfield, MO 65897 ,
  5. 5Recogito AS , Storgaten 72, N-8200 Fauske ,
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Abstract

We report spectral types for over 300 stars selected as candidate hot subdwarf stars and shown to be variable by data from the Transiting Exoplanet Survey Satellite (TESS). Atmospheric parameters determined from low-dispersion spectrograms are provided for many of the targets. In our sample, we find 164 sdB stars, 77 sdB binaries, 21 cataclysmic variables, and small numbers of main sequence, white dwarf, sdO, sdOB, and intermediate helium-rich subdwarf stars. Several stars appear rather peculiar and are discussed in more detail; TIC 360220395, for example, appears to be an old planetary nebula nucleus.

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Cite

BibTeXRIS
BibTeX
@article{worters2026spectroscopy,
  title = {{Spectroscopy of TESS- selected hot variable stars}},
  author = {H L Worters and D Kilkenny and P Németh and A S Baran and R H Østensen},
  journal = {Monthly Notices of the Royal Astronomical Society},
  year = {2026},
  month = oct,
  doi = {10.1093/mnras/stag1945},
  url = {https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1945/8923670},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Spectroscopy of TESS- selected hot variable stars
AU  - H L Worters
AU  - D Kilkenny
AU  - P Németh
AU  - A S Baran
AU  - R H Østensen
PY  - 2026
DA  - 2026/10/15
JO  - Monthly Notices of the Royal Astronomical Society
DO  - 10.1093/mnras/stag1945
UR  - https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1945/8923670
AB  - We report spectral types for over 300 stars selected as candidate hot subdwarf stars and shown to be variable by data from the Transiting Exoplanet Survey Satellite (TESS). Atmospheric parameters determined from low-dispersion spectrograms are provided for many of the targets. In our sample, we find 164 sdB stars, 77 sdB binaries, 21 cataclysmic variables, and small numbers of main sequence, white dwarf, sdO, sdOB, and intermediate helium-rich subdwarf stars. Several stars appear rather peculiar and are discussed in more detail; TIC 360220395, for example, appears to be an old planetary nebula nucleus.
SN  - 0035-8711
SN  - 1365-2966
ER  -