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Multiple emission line components in detached post-common-envelope binaries
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Tappert, Claus, Gänsicke, B. T. (Boris T.), Rebassa-Mansergas, A., Schmidtobreick, Linda and Schreiber, Matthias R. (2011) Multiple emission line components in detached post-common-envelope binaries. Astronomy & Astrophysics, Vol.531 . A113. doi:10.1051/0004-6361/201116833 ISSN 0004-6361.
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Official URL: http://dx.doi.org/10.1051/0004-6361/201116833
Abstract
Motivated by the recent discovery of an H alpha emission line component originating close to the white dwarf primary in the post-common-envelope binary (PCEB) LTT 560, we have undertaken a spectroscopic snapshot survey on 11 short-period (P(orb) < 6 h) PCEBs using FORS2. We have found multi-component H alpha emission line profiles in six of our targets, indicating that multiple H alpha emission sites are rather common in short-period PCEBs. The underlying physical mechanisms, however, can be fundamentally different. In our sample we find one system where the extracted radial velocities of two identified components indicate that both originate in the late-type secondary star, where one is caused by irradiation from the hot white dwarf primary and the other by stellar activity. Another object presents two components that are located on opposite sides of the centre-of-mass, suggesting a case similar to LTT 560, i.e. that accretion of stellar wind from the secondary star produces H alpha emission on, or close to, the white dwarf.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Library of Congress Subject Headings (LCSH): | Double stars, White dwarf stars | ||||
| Journal or Publication Title: | Astronomy & Astrophysics | ||||
| Publisher: | E D P Sciences | ||||
| ISSN: | 0004-6361 | ||||
| Official Date: | July 2011 | ||||
| Dates: |
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| Volume: | Vol.531 | ||||
| Page Range: | A113 | ||||
| DOI: | 10.1051/0004-6361/201116833 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Date of first compliant deposit: | 18 December 2015 | ||||
| Date of first compliant Open Access: | 18 December 2015 | ||||
| Funder: | Fondo Nacional de Desarrollo Científico y Tecnológico (Chile) (FONDECYT) | ||||
| Grant number: | 3110049 (FONDECYT) |
Data sourced from Thomson Reuters' Web of Knowledge
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