The McDonald observatory planet search: new long-period giant planets and two interacting Jupiters in the HD155358 system
Article
Article Title | The McDonald observatory planet search: new long-period giant planets and two interacting Jupiters in the HD155358 system |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Robertson, Paul (Author), Endl, Michael (Author), Cochran, William D. (Author), MacQueen, Phillip J. (Author), Wittenmyer, Robert A. (Author), Horner, J. (Author), Brugamyer, Erik J. (Author), Simon, Attila E. (Author), Barnes, Stuart I. (Author) and Caldwell, Caroline (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 749 (1), pp. 1-17 |
Article Number | 39 |
Number of Pages | 17 |
Year | 2012 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/749/1/39 |
Web Address (URL) | https://iopscience.iop.org/article/10.1088/0004-637X/749/1/39 |
Abstract | We present high-precision radial velocity (RV) observations of four solar-type (F7-G5) stars - HD79498, HD155358, HD197037, and HD220773 - taken as part of the McDonald Observatory Planet Search Program. For each of these stars, we see evidence of Keplerian motion caused by the presence of one or more gas giant planets in long-period orbits. We derive orbital parameters for each system and note the properties (composition, activity, etc.) of the host stars. While we have previously announced the two-gas-giant HD155358 system, we now report a shorter period for planet c. This new period is consistent with the planets being trapped in mutual 2:1 mean-motion resonance. We therefore perform an in-depth stability analysis, placing additional constraints on the orbital parameters of the planets. These results demonstrate the excellent long-term RV stability of the spectrometers on both the Harlan J. Smith 2.7m telescope and the Hobby-Eberly telescope. |
Keywords | astrobiology; planetary systems; planets and satellites; dynamical evolution and stability; HD 79498; HD 155358; HD 197037; HD 220773; radial velocities |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
510101. Astrobiology | |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | University of Texas at Austin, United States |
University of New South Wales | |
University of Szeged, Hungary | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q271w/the-mcdonald-observatory-planet-search-new-long-period-giant-planets-and-two-interacting-jupiters-in-the-hd155358-system
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