The radial velocities and physical parameters of HD 553

HD 553 was discovered as an eclipsing binary by Hipparcos. Here, we present the first radial velocity curve for this system. It is found, that HD 553 is a double-lined spectroscopic binary. Despite the large luminosity difference, the two components of this system are of very similar mass. The prima...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2002-12, Vol.395 (3), p.885-890
Main Authors: Duemmler, R., Iliev, I. Kh, Iliev, L.
Format: Article
Language:English
Subjects:
binaries: eclipsing
binaries: spectroscopic
stars: individual: HD 553
stars: late-type
stars: starspots
techniques: radial velocities
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Summary:HD 553 was discovered as an eclipsing binary by Hipparcos. Here, we present the first radial velocity curve for this system. It is found, that HD 553 is a double-lined spectroscopic binary. Despite the large luminosity difference, the two components of this system are of very similar mass. The primary, a K0-giant, fills a large fraction of its Roche-lobe. The secondary is, despite its very similar mass, still a late-type dwarf. The radial velocity curve allows to constrain several stellar and system parameters.
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361:20021316