A Planet in an 840 Day Orbit around a Kepler Main-sequence A Star Found from Phase Modulation of Its Pulsations
Article
Article Title | A Planet in an 840 Day Orbit around a Kepler Main-sequence A Star Found from Phase Modulation of Its Pulsations |
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ERA Journal ID | 45091 |
Article Category | Article |
Authors | Murphy, Simon J. (Author), Bedding, Timothy R. (Author) and Shibahashi, Hiromoto (Author) |
Journal Title | The Astrophysical Journal Letters |
Journal Citation | 827 (1), pp. 1-4 |
Article Number | L17 |
Number of Pages | 4 |
Year | 2016 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 2041-8205 |
2041-8213 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/2041-8205/827/1/L17 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/2041-8205/827/1/L17 |
Abstract | We have detected a 12 M planet orbiting in or near the habitable zone of a main-sequence A star via the pulsational phase shifts induced by orbital motion. The planet has an orbital period of 840 ±20 days and an eccentricity of 0.15. All known planets orbiting main-sequence A stars have been found via the transit method or by direct imaging. The absence of astrometric or radial velocity detections of planets around these hosts makes ours the first discovery using the orbital motion. It is also the first A star known to host a planet within 1σ of the habitable zone. We find evidence for planets in a large fraction of the parameter space where we are able to detect them. This supports the idea that A stars harbor high-mass planets in wide orbits. |
Keywords | planets and satellites: detection; stars: oscillations; stars: variables: delta Scuti; Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Earth and Planetary Astrophysics |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | University of Sydney |
University of Tokyo, Japan | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q73q2/a-planet-in-an-840-day-orbit-around-a-kepler-main-sequence-a-star-found-from-phase-modulation-of-its-pulsations
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