Orbital and stellar parameters of Omicron Leonis from spectroscopy and interferometry

被引：48

作者：

Hummel, CA

Carquillat, JM

Ginestet, N

Griffin, RF

Boden, AF

Hajian, AR

Mozurkewich, D

Nordgren, TE

机构：

[1] USN Observ, Astrometry Dept, Washington, DC 20392 USA

[2] Observ Midi Pyrenees, Astrophys Lab, F-31400 Toulouse, France

[3] Univ Cambridge, The Observatories, Cambridge CB3 0HA, England

[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[5] USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA

[6] USN Observ, NPOI, Flagstaff, AZ 86002 USA

来源：

ASTRONOMICAL JOURNAL | 2001年 / 121卷 / 03期

关键词：

binaries : spectroscopic; binaries : visual; stars : fundamental parameters; stars : individual (o Leonis); techniques : interferometric;

D O I：

10.1086/319391

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 M. and 1.87 +/- 0.01 M ., 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 L. and 15.4 +/- 1.0 L. for primary and secondary, respectively. Data from the Palomar Testbed Interferometer taken at 2.2 mum are used to constrain the photometry in the infrared.

引用

页码：1623 / 1635

页数：13

共 59 条

[1] THE RELATION BETWEEN ROTATIONAL VELOCITIES AND SPECTRAL PECULIARITIES AMONG A-TYPE STARS [J].