Four new exoplanets and hints of additional substellar companions to exoplanet host stars
Article
Article Title | Four new exoplanets and hints of additional substellar companions to exoplanet host stars |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Wright, J. T. (Author), Marcy, G. W. (Author), Fischer, D. A. (Author), Butler, R. P. (Author), Vogt, S. S. (Author), Tinney, C. G. (Author), Jones, H. R. A. (Author), Carter, B. D. (Author), Johnson, J. A. (Author), McCarthy, C. (Author) and Apps, K. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 657 (1), pp. 533-545 |
Number of Pages | 13 |
Year | 2007 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1086/510553 |
Web Address (URL) | https://iopscience.iop.org/article/10.1086/510553 |
Abstract | [Abstract]: HIP 14810c, HD 154345b, and HD 187123c. The two planets orbiting HIP 14810, from the N2K project, have masses of 3.9 and 0.76 MJ. We have searched the radial velocity time series of 90 known exoplanet systems and found new residual trends due to additional, long period companions. Two stars known to host one exoplanet have sufficient curvature in the residuals to a one planet fit to constrain the minimum mass of the outer companion to be substellar: HD 68988c with 8 MJ < m sin i < 20 MJ and HD 187123c with 3 MJ < m sin i < 7 MJ, both with P > 8 yr. We have also searched the velocity residuals of known exoplanet systems for prospective low-amplitude exoplanets and present some candidates. We discuss techniques for constraining the mass and period of exoplanets in such cases, and for quantifying the significance of weak RV signals. We also present two substellar companions with incomplete orbits and periods longer than 8 yr: HD 24040b and HD 154345b with m sin i < 20 MJ and m sin i < 10 MJ, respectively. |
Keywords | planetary systems, 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 | |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | University of California, United States |
San Francisco State University, United States | |
Carnegie Institution of Washington, United States | |
Anglo-Australian Observatory, Australia | |
University of Hertfordshire, United Kingdom | |
Department of Biological and Physical Sciences | |
University of Sussex, United Kingdom |
https://research.usq.edu.au/item/9y0q5/four-new-exoplanets-and-hints-of-additional-substellar-companions-to-exoplanet-host-stars
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