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An extremely hot white dwarf with a rapidly rotating K-type subgiant companion: UCAC2 46706450

Author
Werner, K.; Reindl, N.; Löbling, L.; Pelisoli, I.; Schaffenroth, V.; Rebassa, A.; Irawati, P.; Ren, J.
Type of activity
Journal article
Journal
Astronomy & astrophysics
Date of publication
2020-10-01
Volume
642
Number
A228
First page
1
Last page
13
DOI
10.1051/0004-6361/202038574
Repository
http://hdl.handle.net/2117/338266 Open in new window
URL
https://www.aanda.org/articles/aa/abs/2020/10/aa38574-20/aa38574-20.html Open in new window
Abstract
The subgiant UCAC2 46706450 is a late-type star with an ultraviolet (UV) excess. It was considered as a candidate to establish a sample of stars of spectral type F, G, and K with white dwarf (WD) companions that could be used to test binary evolution models. To verify the WD nature of the companion, UV spectroscopy has previously been performed by other authors. Via a detailed modelatmosphere analysis, we show that the UV source is an extremely hot WD with an effective temperature of Teff = 105 ...
Citation
Werner, K. [et al.]. An extremely hot white dwarf with a rapidly rotating K-type subgiant companion: UCAC2 46706450. "Astronomy & astrophysics", 1 Octubre 2020, vol. 642, núm. A228, p. 1-13.
Keywords
(Stars:) starspots, (stars:) white dwarfs, Sars: AGB and post-AGB,, Sars: abundances, Stars: atmospheres, Stars: individual: UCAC2 46706450
Group of research
GAA - Astronomy and Astrophysics Group

Participants

  • Werner, Klaus  (author)
  • Reindl, Nicole  (author)
  • Löbling, Lisa  (author)
  • Pelisoli, Ingrid  (author)
  • Schaffenroth, Veronika  (author)
  • Rebassa Mansergas, Alberto  (author)
  • Irawati, Puji  (author)
  • Ren, Juanjuan  (author)

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