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M2K. II. A Triple-P...
M2K. II. A Triple-Planet System Orbiting Hip 57274
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Fischer, Debra A. (author)
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- Gaidos, Eric (author)
- Lund University,Lunds universitet,Pufendorfinstitutet,Universitetets särskilda verksamheter,Pufendorf Institute for Advanced Studies,University Specialised Centres
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Howard, Andrew W. (author)
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Giguere, Matthew J. (author)
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Johnson, John A. (author)
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Marcy, Geoffrey W. (author)
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Wright, Jason T. (author)
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Valenti, Jeff A. (author)
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- Piskunov, Nikolai (author)
- Uppsala universitet,Observationell astrofysik
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Clubb, Kelsey I. (author)
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Isaacson, Howard (author)
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Apps, Kevin (author)
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Lepine, Sebastien (author)
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Mann, Andrew (author)
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Moriarty, John (author)
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Brewer, John (author)
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Spronck, Julien F. P. (author)
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Schwab, Christian (author)
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Szymkowiak, Andrew (author)
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(creator_code:org_t)
- 2012
- 2012
- English.
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In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 745:1, s. 21-
- Related links:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Subject headings
Close
- Doppler observations from Keck Observatory have revealed a triple-planet system orbiting the nearby K4V star, HIP 57274. The inner planet, HIP 57274b, is a super-Earth with M sin i = 11.6 M-circle plus (0.036 M-Jup), an orbital period of 8.135 +/- 0.004 days, and slightly eccentric orbit e = 0.19 +/- 0.1. We calculate a transit probability of 6.5% for the inner planet. The second planet has M sin i = 0.4 M-Jup with an orbital period of 32.0 +/- 0.02 days in a nearly circular orbit (e = 0.05 +/- 0.03). The third planet has M sin i = 0.53 M-Jup with an orbital period of 432 +/- 8 days (1.18 years) and an eccentricity e = 0.23 +/- 0.03. This discovery adds to the number of super-Earth mass planets with M sin i < 12 M-circle plus that have been detected with Doppler surveys. We find that 56% +/- 18% of super-Earths are members of multi-planet systems. This is certainly a lower limit because of observational detectability limits, yet significantly higher than the fraction of Jupiter mass exoplanets, 20% +/- 8%, that are members of Doppler-detected, multi-planet systems.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- SAMHÄLLSVETENSKAP -- Annan samhällsvetenskap -- Tvärvetenskapliga studier inom samhällsvetenskap (hsv//swe)
- SOCIAL SCIENCES -- Other Social Sciences -- Social Sciences Interdisciplinary (hsv//eng)
Keyword
- planetary systems
- stars: individual (HIP 57274)
- stars: individual (HIP 57274)
- planetary systems
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Fischer, Debra A ...
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Gaidos, Eric
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Howard, Andrew W ...
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Giguere, Matthew ...
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Johnson, John A.
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Marcy, Geoffrey ...
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show more...
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Wright, Jason T.
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Valenti, Jeff A.
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Piskunov, Nikola ...
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Clubb, Kelsey I.
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Isaacson, Howard
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Apps, Kevin
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Lepine, Sebastie ...
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Mann, Andrew
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Moriarty, John
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Brewer, John
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Spronck, Julien ...
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Schwab, Christia ...
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Szymkowiak, Andr ...
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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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and Astronomy Astrop ...
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- SOCIAL SCIENCES
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SOCIAL SCIENCES
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and Other Social Sci ...
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and Social Sciences ...
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Astrophysical Jo ...
- By the university
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Uppsala University
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Lund University