Orbital and Stellar Parameters of Omicron Leonis from Spectroscopy and Interferometry
Abstract
We present a three-dimensional solution for the orbit of the double star Omicron Leonis, based on new photoelectric radial velocity data mainly from the Observatoire de Haute-Provence and on interferometric data obtained with the Navy Prototype Optical Interferometer, the Mark III Stellar Interferometer, and the Palomar Testbed Interferometer. Omicron Leo's primary is a giant of type F9 and the secondary is an A5m dwarf, for which we derive masses of 2.12+/-0.01 Msolar and 1.87+/-0.01 Msolar, respectively. The distance to the binary is determined to be 41.4+/-0.1 pc. Combining the distance with the measured apparent magnitudes and color differences between the components yields luminosities of 39.4+/-2.4 Lsolar and 15.4+/-1.0 Lsolar for primary and secondary, respectively. Data from the Palomar Testbed Interferometer taken at 2.2 μm are used to constrain the photometry in the infrared.
- Publication:
-
The Astronomical Journal
- Pub Date:
- March 2001
- DOI:
- 10.1086/319391
- Bibcode:
- 2001AJ....121.1623H
- Keywords:
-
- Stars: Binaries: Spectroscopic;
- Stars: Binaries: Visual;
- Stars: Fundamental Parameters;
- Stars: Individual: Constellation Name: ο Leonis;
- Techniques: Interferometric