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TOPIC: HD16760b

Blobrana

L

Posts: 131433

Date: Aug 4 18:09 2009

HD 16760b	Permalink

An exoplanet of around 14 Jupiter masses, with 465 day orbital period. __________________

Blobrana

L

Posts: 131433

Date: Jul 30 14:13 2009

HD 16760	Permalink

Title: A Substellar Companion in a 1.3 yr Nearly-circular Orbit of HD 16760 Authors: Bunei Sato, Debra A. Fischer, Shigeru Ida, Hiroki Harakawa, Masashi Omiya, John A. Johnson, Geoffrey W. Marcy, Eri Toyota, Yasunori Hori, Howard Isaacson, Andrew W. Howard, Kathryn M.G. Peek We report the detection of a substellar companion orbiting the G5 dwarf HD 16760 from the N2K sample. Precise Doppler measurements of the star from Subaru and Keck revealed a Keplerian velocity variation with a period of 466.47±0.35 d, a semiamplitude of 407.71±0.84 m/s, and an eccentricity of 0.084±0.003. Adopting a stellar mass of 0.78±0.05 M_Sun, we obtain a minimum mass for the companion of 13.13±0.56 Jupiter masses, which is close to the planet/brown-dwarf transition, and the semimajor axis of 1.084±0.023 AU. The nearly circular orbit despite the large mass and intermediate orbital period makes this companion unique among known substellar companions. Read more (45kb, PDF) __________________

Blobrana

L

Posts: 131433

Date: Jul 22 17:10 2009

HD16760b	Permalink

Title: The SOPHIE northern extrasolar planets. I. A companion close to the planet/brown-dwarf transition around HD16760 Authors: F. Bouchy, G. Hebrard, S. Udry, X. Delfosse, I. Boisse, et al We report on the discovery of a substellar companion or a massive Jupiter orbiting the G5V star HD16760 with the spectrograph SOPHIE installed on the OHP 1.93-m telescope. Characteristics and performances of the spectrograph are presented, as well as the SOPHIE exoplanet consortium program. With a minimum mass of 14.3 Mjup, an orbital period of 465 days and an eccentricity of 0.067, HD16760b seems to be located just at the end of the mass distribution of giant planets, close to planet/brown-dwarf transition. Its quite circular orbit supports a formation in a gaseous protoplanetary disk. Read more (50kb, PDF) __________________

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