Five Intermediate‐Period Planets from the N2K Sample
| Autor: | R. Paul Butler, Genya Takeda, Peter Driscoll, John Asher Johnson, Masashi Omiya, Eri Toyota, Geoffrey W. Marcy, Jason T. Wright, Gregory Laughlin, Sarah E. Robinson, Debra A. Fischer, Bun'ei Sato, Steven S. Vogt, Gregory W. Henry, Shigeru Ida |
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| Rok vydání: | 2007 |
| Předmět: |
010504 meteorology & atmospheric sciences
media_common.quotation_subject Metallicity FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics 01 natural sciences Jovian Planet 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Transit (astronomy) Eccentricity (behavior) 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences media_common Physics Astrophysics (astro-ph) Astronomy and Astrophysics Orbital period Orbit Stars Space and Planetary Science Astrophysics::Earth and Planetary Astrophysics |
| Zdroj: | The Astrophysical Journal. 669:1336-1344 |
| ISSN: | 1538-4357 0004-637X |
| Popis: | We report the detection of five Jovian mass planets orbiting high metallicity stars. Four of these stars were first observed as part of the N2K program and exhibited low RMS velocity scatter after three consecutive observations. However, follow-up observations over the last three years now reveal the presence of longer period planets with orbital periods ranging from 21 days to a few years. HD 11506 is a G0V star with a planet of \msini = 4.74 \mjup in a 3.85 year orbit. HD 17156 is a G0V star with a 3.12 \mjup planet in a 21.2 day orbit. The eccentricity of this orbit is 0.67, one of the highest known for a planet with a relatively short period. The orbital period for this planet places it in a region of parameter space where relatively few planets have been detected. HD 125612 is a G3V star with a planet of \msini = 3.5 \mjup in a 1.4 year orbit. HD 170469 is a G5IV star with a planet of \msini = 0.67 \mjup in a 3.13 year orbit. HD 231701 is an F8V star with planet of 1.08 \mjup in a 142 day orbit. All of these stars have supersolar metallicity. Three of the five stars were observed photometrically but showed no evidence of brightness variability. A transit search conducted for HD 17156 was negative but covered only 25% of the search space and so is not conclusive. Comment: 13 pages, 9 figures, accepted ApJ Resubmitted here with some additional data, modified Keplerian orbits |
| Databáze: | OpenAIRE |
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