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THE NASA-UC ETA-EAR...
THE NASA-UC ETA-EARTH PROGRAM : I. A SUPER-EARTH ORBITING HD 7924
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Howard, Andrew W. (author)
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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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Giguere, Matthew J. (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, Nikolai E. (author)
- Uppsala universitet,Observationell astrofysik
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(creator_code:org_t)
- 2009
- 2009
- English.
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In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 696:1, s. 75-83
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- We report the discovery of the first low-mass planet to emerge from the NASA-UC Eta-Earth Program, a super-Earth orbiting the K0 dwarf HD 7924. Keplerian modeling of precise Doppler radial velocities reveals a planet with minimum mass M-P sin i = 9.26M(circle plus) in a P = 5.398 d orbit. Based on Keck-HIRES measurements from 2001 to 2008, the planet is robustly detected with an estimated false alarm probability of less than 0.001. Photometric observations using the Automated Photometric Telescopes at Fairborn Observatory show that HD 7924 is photometrically constant over the radial velocity period to 0.19 mmag, supporting the existence of the planetary companion. No transits were detected down to a photometric limit of similar to 0.5 mmag, eliminating transiting planets with a variety of compositions. HD 7924b is one of only eight planets detected by the radial velocity technique with M-P sini < 10 M-circle plus and as such is a member of an emerging family of low-mass planets that together constrain theories of planet formation.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- planetary systems
- stars: individual (HD 7924)
- techniques: radial velocities
- Physics
- Fysik
- Astronomy with specialization in Astrophysics
- Astronomi med intiktning mot astrofysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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Howard, Andrew W ...
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Johnson, John As ...
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Marcy, Geoffrey ...
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Fischer, Debra A ...
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Wright, Jason T.
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Henry, Gregory W ...
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show more...
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Giguere, Matthew ...
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Isaacson, Howard
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Valenti, Jeff A.
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Anderson, Jay
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Piskunov, Nikola ...
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show less...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Astrophysical Jo ...
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Uppsala University