APPARENT ORBIT OF THE SPECTROSCOPIC BINARY BETA-ARIETIS WITH THE MARK-III STELLAR INTERFEROMETER

被引：32

作者：

PAN, XP

SHAO, M

COLAVITA, MM

MOZURKEWICH, D

SIMON, RS

JOHNSTON, KJ

机构：

[1] CALTECH,JET PROP LAB,OPT SCI & APPLICAT SECT,PASADENA,CA 91109

[2] USN,RES LAB,EO HULBURT CTR SPACE RES,WASHINGTON,DC 20375

[3] HARVARD SMITHSONIAN CTR ASTROPHYS,CAMBRIDGE,MA 02138

来源：

ASTROPHYSICAL JOURNAL | 1990年 / 356卷 / 02期

关键词：

Interferometry; Stars: binaries; Stars: individual (beta Ari);

D O I：

10.1086/168870

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The spectroscopic binary β Ari has been directly resolved with the Mark III Stellar Interferometer. Observations in 1988 were analyzed to determine the visual orbit of the system with the following results: eccentricity e = 0.903 ± 0.012, semimajor axis a" = 0".0361 ± 0".0003, inclination i = 44°.7 ± 1°.3, longitude of periastron w = 209°.1 ± 1°.2, position angle of ascending node Ω= 79°.1 ± 0°.8. The measured magnitude difference between two components, Δm = 2.63 ± 0.22 at 800 nm, yields individual visual magnitudes of mv1 = 2.70 ± 0.02 and mv2 = 5.80 ± 0.20. Combined with data from spectroscopic observations, masses M1 = (2.34 ± 0.10) M⊙, M2 = (1.34 ± 0.07) M⊙, and geometrical parallax π= 0".053 ± 0".002 are derived. These results demonstrate that both components of β Ari agree well with the empirical mass-luminosity relation.

引用

页码：641 / 645

页数：5