Planetary Companions to HD 136118, HD 50554, and HD 106252

Details Planetary Companions to HD 136118, HD 50554, and HD 106252 Planetary Companions to HD 136118, HD 50554, and HD 106252

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002pasp..114..529f&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 114, Issue 795, pp. 529-535.

Astronomy and Astrophysics

Astronomy

25

Stars: Low-Mass, Brown Dwarfs, Planetary Systems, Stars: Individual (Hd 136118), Stars: Individual (Hd 50554), Stars: Individual (Hd 106252)

Scientific paper

Precise Doppler observations at Lick Observatory have revealed a substellar companion orbiting the F9 V star HD 136118 with an orbital period P=1209+/-24 days, velocity semiamplitude K=212+/-6 m s-1, and eccentricity of 0.37+/-0.025. The assumed stellar mass of 1.24 Msolar yields a Keplerian companion with Msini=11.9 MJ and semimajor axis of 2.3 AU. We also confirm the orbital solutions for two previously announced planets, one orbiting the F8 V star HD 50554 and one orbiting the G0 V star HD 106252. Our orbital solution for HD 50554 yields P=1254+/-34 days, K=78.5+/-6.7 m s-1, and e=0.51+/-0.06. The assumed stellar mass of 1.065 Msolar implies a companion mass Msini=3.7 MJ and semimajor axis of 2.2 AU. For HD 106252, we find P=1503.3+/-62 days, K=150.9+/-25 m s-1, and eccentricity e=0.57+/-0.11. The assumed stellar mass of 0.96 Msolar implies Msini=6.96 MJ and semimajor axis of 2.42 AU. Based on observations obtained at Lick and Keck Observatories, which are operated by the University of California.

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