The Library
The pre-cataclysmic variable, LTT 560
Tools
Tappert, Claus, Gaensicke, B. T., Schmidtobreick, Linda, Aungwerojwit, A., Mennickent, Ronald E. and Koester, Detlev (2007) The pre-cataclysmic variable, LTT 560. Astronomy & Astrophysics, Vol.474 (No.1). pp. 205-211. doi:10.1051/0004-6361:20077316 ISSN 0004-6361.
PDF
WRAP_gansicke_49_pre-cataclysmic.pdf - Requires a PDF viewer. Download (530Kb) |
Official URL: http://dx.doi.org/10.1051/0004-6361:20077316
Abstract
Aims. System parameters of the object LTT560 are determined in order to clarify its nature and evolutionary status.
Methods. We apply time-series photometry to reveal orbital modulations of the light curve, time-series spectroscopy to measure radial velocities of features from both the primary and the secondary star, and flux-calibrated spectroscopy to derive temperatures of both components.
Results. We find that LTT 560 is composed of a low temperature (T ∼ 7500 K) DA white dwarf as the primary and an M5.5±1 mainsequence star as the secondary component. The current orbital period is Porb = 3.54(07) h.We derive a mass ratio Msec/Mwd = 0.36(03) and estimate the distance to d = 25–40 pc. Long-term variation of the orbital light curve and an additional Hα emission component
on the white dwarf indicate activity in the system, probably in the form of flaring and/or accretion events.
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Cataclysmic variable stars, Double stars -- Orbits, Double stars -- Motion in line of sight, Stars -- Temperature, Stars -- Observations | ||||
Journal or Publication Title: | Astronomy & Astrophysics | ||||
Publisher: | EDP Sciences | ||||
ISSN: | 0004-6361 | ||||
Official Date: | October 2007 | ||||
Dates: |
|
||||
Volume: | Vol.474 | ||||
Number: | No.1 | ||||
Page Range: | pp. 205-211 | ||||
DOI: | 10.1051/0004-6361:20077316 | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Funder: | Fondo Nacional de Desarrollo Científico y Tecnológico (Chile) (FONDECYT), Particle Physics and Astronomy Research Council (Great Britain) (PPARC), Thailand | ||||
Grant number: | 1051078 (FONDECYT) |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year