Stellar variability of the exoplanet hosting star HD 63454
Article
Article Title | Stellar variability of the exoplanet hosting star HD 63454 |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Kane, Stephen R. (Author), Dragomir, Diana (Author), Ciardi, David R. (Author), Lee, Jae Woo (Author), Lo Curto, Gaspare (Author), Lovis, Christophe (Author), Naef, Dominique (Author), Mahadevan, Suvrath (Author), Pilyavsky, Genady (Author), Udry, Stephane (Author), Wang, Xuesong (Author) and Wright, Jason (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 737 (2), pp. 58-62 |
Article Number | 58 |
Number of Pages | 5 |
Year | 2011 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/737/2/58 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/737/2/58 |
Abstract | Of the hundreds of exoplanets discovered using the radial velocity (RV) technique, many are orbiting close to their host stars with periods less than 10 days. One of these, HD 63454, is a young active K dwarf which hosts a Jovian planet in a 2.82 day period orbit. The planet has a 14% transit probability and a predicted transit depth of 1.2%. Here we provide a re-analysis of the RV data to produce an accurate transit ephemeris. We further analyze 8 nights of time series data to search for stellar activity both intrinsic to the star and induced by possible interactions of the exoplanet with the stellar magnetospheres. We establish the photometric stability of the star at the 3 mmag level despite strong CaII emission in the spectrum. Finally, we rule out photometric signatures of both star-planet magnetosphere interactions and planetary transit signatures. From this we are able to place constraints on both the orbital and physical properties of the planet. |
Keywords | planetary systems; stars; HD 63454; radial velocities; photometric techniques |
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 | California Institute of Technology (Caltech), United States |
University of British Columbia, Canada | |
National Aeronautics and Space Administration (NASA), United States | |
Sejong University, Korea | |
European Southern Observatory (ESO), Germany | |
University of Geneva, Switzerland | |
Pennsylvania State University, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4338/stellar-variability-of-the-exoplanet-hosting-star-hd-63454
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