Contribution a l'etude des binaires des types F, G, K, M. VII. HD 147395, une geante M binaire spectroscopique. Contribution to the study of F, G, K, M binaries. VII. HD 147395, a M giant spectroscopic binary.

Details Contribution a l'etude des binaires des types F, G, K, M. VII. HD 147395, une geante M binaire spectroscopique. Contribution to the study of F, G, K, M binaries. VII. HD 147395, a M giant spectroscopic binary. Contribution a l'etude des binaires des types F, G, K, M. VII. HD 147395, une geante M binaire spectroscopique. Contribution to the study of F, G, K, M binaries. VII. HD 147395, a M giant spectroscopic binary.

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..117..445c&link_type=abstract

Astronomy and Astrophysics Supplement, v.117, p.445-447

Astronomy and Astrophysics

Astrophysics

3

Stars: Individual: Hd 147395, Stars: Spectroscopic Binaries, Stars: Fundamental Parameters

Scientific paper

HD 147395, a giant M2 star, was found to be a spectroscopic binary by the Mount Wilson astronomers some time ago, but its orbit remained unknown so far. Radial velocity observations carried out at the Observatoire de Haute-Provence with the CORAVEL spectrovelocimeter permitted us to obtain the orbital elements of this binary. They are as follows: P=335.537days; T=4448335.0JD; ω=336.9deg ; e=0.235; K=16.87km/s; V_0_=-20.12km/s; a_1_sini=75.67Gm; f(M)=0.154Msun_. The spectral type of the primary, and the f(M) value, lead to M_2_>=1.0+/-0.2Msun_ for the mass of the unseen companion. According to the color indices B-V and U-B of the system, the secondary star should be a F5V. We estimate at 1.25+/-0.1UA the mean linear separation of the components; nevertheless, both the distance of this binary (d~275pc) and the expected value of {DELTA}m seem too important for the system to be resolved by interferometry.

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