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Astrophysics > Solar and Stellar Astrophysics

arXiv:1205.2259 (astro-ph)
[Submitted on 10 May 2012]

Title:Calcium Emission in Interacting Binary Be Stars

Authors:Pavel Koubský, Lenka Kotková, Viktor Votruba, Mirek Šlechta, Petr Škoda, Petr Harmanec, Jana Nemravová, Klára Šejnová, Šárka Dvořáková, Daniela Korčáková
View a PDF of the paper titled Calcium Emission in Interacting Binary Be Stars, by Pavel Koubsk\'y and 8 other authors
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Abstract:Polidan (1976) suggested that Be stars showing the CaII IR triplet in emission are interacting binaries. With the advent of the Gaia satellite, which will host a spectrometer to observe stars in the range 8470--8750 Å, we carried out a spectroscopic survey of 150 Be stars, including Be binaries. We show that the Ca II triplet in emission, often connected with emission in Paschen lines, is an indicator of a peculiar environment in a Be star disc rather than a signature of an interacting binary Be star. However, Ca II emission without visible emission in Paschen lines is observed in interacting binary stars, as well as in peculiar objects. During the survey, a new interacting Be binary - HD 81357 - was discovered.
Comments: 3 pages, 1 figure, conference proceeding
Subjects: Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:1205.2259 [astro-ph.SR]
  (or arXiv:1205.2259v1 [astro-ph.SR] for this version)
  https://doi.org/10.48550/arXiv.1205.2259
arXiv-issued DOI via DataCite

Submission history

From: Pavel Koubsky [view email]
[v1] Thu, 10 May 2012 13:35:21 UTC (31 KB)
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