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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz


IMPACT FACTOR 2018: 0.350

CiteScore 2018: 0.24

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ICV 2017: 121.03

Open Access
Online
ISSN
2543-6376
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Volume 27, Issue 1

Issues

Spectroscopy of hot subdwarf binaries

Simon Kreuzer
  • Corresponding author
  • Dr. Karl Remeis- Observatory & ECAP, Astronomical Institute of the Friedrich- Alexander University Erlangen-Nuremberg, Sternwartstr. 7, 96049 Bamberg, Germany
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Andreas Irrgang
  • Dr. Karl Remeis-Observatory & ECAP, Astronomical Institute of the Friedrich-Alexander University Erlangen-Nuremberg, Sternwartstr. 7, 96049 Bamberg, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Ulrich Heber
  • Dr. Karl Remeis-Observatory & ECAP, Astronomical Institute of the Friedrich-Alexander University Erlangen-Nuremberg, Sternwartstr. 7, 96049 Bamberg, Germany
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2018-06-06 | DOI: https://doi.org/10.1515/astro-2018-0013

Abstract

We present a status report of our spectroscopic analysis of subdwarf binaries consisting of a subdwarf and a F/G/K-type main-sequence companion. These systems selected from SDSS photometry show significant excess in the (infra-)red which can not be explained by interstellar reddening. Inspection of SDSS spectra revealed that most of them are composite spectrum sdB binaries. Once their spectra are disentangled, a detailed spectral analysis can be carried out. It reveals Teff, log g and the metal abundance of each individual star. The cool companion is of particular interest, because its spectrum reveals the original chemical composition of the binary.

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About the article

Received: 2017-10-19

Accepted: 2017-12-21

Published Online: 2018-06-06


Citation Information: Open Astronomy, Volume 27, Issue 1, Pages 95–97, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2018-0013.

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© 2018 Simon Kreuzer, published by De Gruyter. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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