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 the system are of very simmilar 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.
@article{arxiv.astro-ph/0210335,
title = {The radial velocities and physical parameters of HD 553},
author = {R. Duemmler and I. Kh. Iliev and L. Iliev},
journal= {arXiv preprint arXiv:astro-ph/0210335},
year = {2009}
}
Comments
6 pages, 3 Postscript figures, accepted in Astronomy and Astrophysics