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The UV spectrum of the binary system TY Pyx

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Abstract

A detailed list and analysis of line identifications of five UV spectra of the RS CVn-type binary system TY Pyxidis are presented. These spectra are recorded at different phases with the International Ultraviolet Explorer (IUE). Two of them are in the wavelength rangeλλ1235–1950 Å while the other three in the rangeλλ2700–3110 Å.

The far-UV spectrum of TY Pyx is mainly an emission spectrum dominated by the emission lines of the ions:Ci, Oi, Cii, Siii, Heii, Alii, and Feiii. We also pointed out the existence of a Feiii [34] line in absorption.

The UV spectrum between 2700–3110 Å is dominated by weak absorption lines. Two satellite components are indicated for many lines, which correspond to the two stars of the system, in the two out of the three spectra (LWP 13386 and LWP 13347).

Violet emission wings are observed for Fei [1], Tii [1],Oiv [1], and Siiii [1]. The UV spectrum of TY Pyx is also characterized by the multi-structure of Mgii [1] resonance lines.

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Authors and Affiliations

  1. Section of Astrophysics, Astronomy and Mechanics, Department of Physics, University of Athens, Zografos, Greece

    E. Danezis, E. Antonopoulou & E. Theodossiou

Authors
  1. E. Danezis
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  2. E. Antonopoulou
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  3. E. Theodossiou
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Additional information

Based on data from the International Ultraviolet Explorer, de-archived from the Villafranca Data Archive of the European Space Agency.

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Danezis, E., Antonopoulou, E. & Theodossiou, E. The UV spectrum of the binary system TY Pyx. Astrophys Space Sci 200, 47–65 (1993). https://doi.org/10.1007/BF00658109

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  • DOI: https://doi.org/10.1007/BF00658109

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