THE ANGLO-AUSTRALIAN PLANET SEARCH. XXII. TWO NEW MULTI-PLANET SYSTEMS
We report the detection of two new planets from the Anglo-Australian Planet Search. These planets orbit two stars each previously known to host one planet. The new planet orbiting HD 142 has a period of 6005 + or - 427 days, and a minimum mass of 5.3 M sub(Jup). HD 142c is thus a new Jupiter analog:...
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| Veröffentlicht in: | The Astrophysical journal 2012-07, Vol.753 (2), p.1-12 |
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| creator | WITTENMYER, Robert A HORNER, J JENKINS, J. S ZHANG, Z VOGT, S. S RIVERA, Eugenio J TUOMI, Mikko SALTER, G. S TINNEY, C. G BUTLER, R. P JONES, H. R. A O'TOOLE, S. J BAILEY, J CARTER, B. D |
| description | We report the detection of two new planets from the Anglo-Australian Planet Search. These planets orbit two stars each previously known to host one planet. The new planet orbiting HD 142 has a period of 6005 + or - 427 days, and a minimum mass of 5.3 M sub(Jup). HD 142c is thus a new Jupiter analog: a gas-giant planet with a long period and low eccentricity (e = 0.21 + or - 0.07). The second planet in the HD 159868 system has a period of 352.3 + or - 1.3 days and m sin i = 0.73 + or - 0.05 M sub(Jup). In both of these systems, including the additional planets in the fitting process significantly reduced the eccentricity of the original planet. These systems are thus examples of how multiple-planet systems can masquerade as moderately eccentric single-planet systems. |
| doi_str_mv | 10.1088/0004-637X/753/2/169 |
| format | Article |
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HD 142c is thus a new Jupiter analog: a gas-giant planet with a long period and low eccentricity (e = 0.21 + or - 0.07). The second planet in the HD 159868 system has a period of 352.3 + or - 1.3 days and m sin i = 0.73 + or - 0.05 M sub(Jup). In both of these systems, including the additional planets in the fitting process significantly reduced the eccentricity of the original planet. 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| subjects | ASTRONOMY ASTROPHYSICS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY DETECTION Earth, ocean, space Eccentricity Eccentrics Exact sciences and technology Fittings Jupiter (planet) MASS ORBITS Planet detection PLANETS RADIAL VELOCITY Searching STARS |
| title | THE ANGLO-AUSTRALIAN PLANET SEARCH. XXII. TWO NEW MULTI-PLANET SYSTEMS |
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