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Stars with discrepant v sin i as derived from the Ca II 3933 and Mg II 4481 Å lines. VI. HD 199892 — an SB2 spectroscopic binary

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Abstract

We analyzed the spectra of a well known SB1 binary HD199892 for which the projected rotational velocity v sin i, introduced in the literature, significantly differs when determined from the lines of Ca II at 3933 Å and ofMg II at 4481 Å. Contrary to the former findings, we discovered the signs of spectral lines of a companion star in the profile of Hβ as well as weak metallic lines in the high resolution high S/N spectra covering the most of the visual region. We estimated the secondary star to be a main sequence A4V star with a mass of 2.2M ⊙ and derived its radial velocity which resulted in the mass of the primary M = 4.6M ⊙. Short sections of the spectra in the Mg II 4481 Å and Ca II 3933 Å regions are analyzed as well.

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Authors and Affiliations

  1. Tatranská Lomnica, 05960, Slovakia

    J. Zverko

  2. Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, 369167, Russia

    I. Romanyuk, D. Kudryavtsev & E. Semenko

  3. Institute of Astronomy and National Astronomical Observatory Rozhen, Sofia, 1784, Bulgaria

    I. Iliev & I. Stateva

Authors
  1. J. Zverko
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  2. I. Romanyuk
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  3. I. Iliev
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  4. D. Kudryavtsev
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  5. I. Stateva
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  6. E. Semenko
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Corresponding author

Correspondence to J. Zverko.

Additional information

The text was submitted by the authors in English.

Based on spectroscopic observations with the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences and the 2-m telescope of the National Astronomical Observatory, Bulgaria, and the public archive of ELODIE and SOFIE spectrographs.

Published in Russian in Astrofizicheskii Byulleten’, 2017, Vol. 72, No. 1, pp. 17–25.

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Zverko, J., Romanyuk, I., Iliev, I. et al. Stars with discrepant v sin i as derived from the Ca II 3933 and Mg II 4481 Å lines. VI. HD 199892 — an SB2 spectroscopic binary. Astrophys. Bull. 72, 16–23 (2017). https://doi.org/10.1134/S1990341317030026

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  • DOI: https://doi.org/10.1134/S1990341317030026

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