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THE NASA-UC ETA-EAR...
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Howard, Andrew W.
(author)
THE NASA-UC ETA-EARTH PROGRAM. III. A SUPER-EARTH ORBITING HD 97658 AND A NEPTUNE-MASS PLANET ORBITING G1 785
- Article/chapterEnglish2011
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LIBRIS-ID:oai:DiVA.org:uu-151905
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-151905URI
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https://doi.org/10.1088/0004-637X/730/1/10DOI
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Language:English
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Summary in:English
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We report the discovery of planets orbiting two bright, nearby early K dwarf stars, HD 97658 and G1 785. These planets were detected by Keplerian modeling of radial velocities measured with Keck-HIRES for the NASA-UC Eta-Earth Survey. HD 97658 b is a close-in super-Earth with minimum mass M sin i = 8.2 +/- 1.2 M-circle plus, orbital period P = 9.494 +/- 0.005 days, and an orbit that is consistent with circular. G1 785 b is a Neptune-mass planet with M sin i = 21.6 +/- 2.0 M-circle plus, P = 74.39 +/- 0.12 days, and orbital eccentricity e = 0.30 +/- 0.09. Photometric observations with the T12 0.8 m automatic photometric telescope at Fairborn Observatory show that HD 97658 is photometrically constant at the radial velocity period to 0.09 mmag, supporting the existence of the planet.
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Johnson, John Asher
(author)
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Marcy, Geoffrey W.
(author)
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Fischer, Debra A.
(author)
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Wright, Jason T.
(author)
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Henry, Gregory W.
(author)
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Isaacson, Howard
(author)
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Valenti, Jeff A.
(author)
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Anderson, Jay
(author)
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Piskunov, NikolaiUppsala universitet,Observationell astrofysik(Swepub:uu)nikopisk
(author)
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Uppsala universitetObservationell astrofysik
(creator_code:org_t)
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In:Astrophysical Journal730:1, s. 10-0004-637X1538-4357
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Uppsala University