Planetary Companions to HD 136118, HD 50554, and HD 106252
Autor: | R. Paul Butler, Bernie Walp, Geoffrey W. Marcy, Kevin Apps, Steven S. Vogt, Debra A. Fischer |
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Rok vydání: | 2002 |
Předmět: | |
Zdroj: | Publications of the Astronomical Society of the Pacific. 114:529-535 |
ISSN: | 1538-3873 0004-6280 |
Popis: | 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 yields a Keplerian companion with M sin i = 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 implies a companion mass M sin i = 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 implies M sin i = 6.96 MJ and semimajor axis of 2.42 AU. |
Databáze: | OpenAIRE |
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