THE ANGLO-AUSTRALIAN PLANET SEARCH. XXIII. TWO NEW JUPITER ANALOGS

We report the discovery of two long-period giant planets from the Anglo-Australian Planet Search. HD 154857c is in a multiple-planet system, while HD 114613b appears to be solitary. HD 114613b has an orbital period P = 10.5 yr, and a minimum mass m sin i of 0.48 M sub(Jup); HD 154857c has P = 9.5 yr...

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Bibliographic Details
Published in:The Astrophysical journal 2014-03, Vol.783 (2), p.1-9
Main Authors: Wittenmyer, Robert A, Horner, Jonathan, Tinney, C G, Butler, R P, Jones, H R A, Tuomi, Mikko, Salter, G S, Carter, B D, Koch, F Elliott, O'Toole, S J, Bailey, J, Wright, D
Format: Article
Language:English
Subjects:
Analogs
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
DETECTION
Dynamical systems
EVOLUTION
JUPITER PLANET
Legacy
MASS
Planet detection
PLANETS
RADIAL VELOCITY
SATELLITES
Searching
SIMULATION
SOLAR SYSTEM
STABILITY
STARS
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Summary:We report the discovery of two long-period giant planets from the Anglo-Australian Planet Search. HD 154857c is in a multiple-planet system, while HD 114613b appears to be solitary. HD 114613b has an orbital period P = 10.5 yr, and a minimum mass m sin i of 0.48 M sub(Jup); HD 154857c has P = 9.5 yr and m sin i = 2.6 M sub(Jup). These new data confirm the planetary nature of the previously unconstrained long-period object in the HD 154857 system.We have performed detailed dynamical stability simulations which show that the HD 154857 two-planet system is stable on timescales of at least 10 super(8) yr. These results highlight the continued importance of "legacy" surveys with long observational baselines; these ongoing campaigns are critical for determining the population of Jupiter analogs, and hence of those planetary systems with architectures most like our own solar system.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/783/2/103