The TESS View of LOFAR Radio-emitting Stars
Article
Article Title | The TESS View of LOFAR Radio-emitting Stars |
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ERA Journal ID | 45091 |
Article Category | Article |
Authors | Pope, Benjamin J. S. (Author), Callingham, Joseph R. (Author), Feinstein, Adina D. (Author), Gunther, Maximilian N. (Author), Vedantham, Harish K. (Author), Ansdell, Megan (Author) and Shimwell, Timothy W. (Author) |
Journal Title | The Astrophysical Journal Letters |
Journal Citation | 919 (1), pp. 1-8 |
Article Number | L10 |
Number of Pages | 8 |
Year | 2021 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 2041-8205 |
2041-8213 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/2041-8213/ac230c |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/2041-8213/ac230c |
Abstract | The recent detection of the M dwarf GJ 1151 at 144 MHz low radio frequencies using LOFAR has been interpreted as evidence of an exoplanet magnetically interacting with its host star. This would be the first exoplanet detected around a main-sequence star by a radio telescope. Radial velocity confirmation of such a planet has proven inconclusive and it remains possible that the radio emission could be generated by a stellar coronal process. Using data from TESS, we shed light on this question by probing the stellar activity and flares of GJ 1151 as well as 14 other M dwarfs detected by LOFAR. GJ 1151 and three other star–planet interaction candidates are found to be inactive, with no rotational modulation and few, if any, flares. The remainder of the LOFAR-detected M dwarfs flare frequently. We consider it unlikely that stellar activity is responsible for the bright, circularly polarized emission from GJ 1151 and its three analogs and support the star–planet magnetic interaction interpretation. |
Keywords | X-ray, m dwarfs, emission, planets, flare, centauri, search, solar, earth |
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 | Centre for Astrophysics |
Leiden University, Netherlands | |
University of Chicago, United States | |
Massachusetts Institute of Technology, United States | |
Netherlands Institute for Radio Astronomy, Netherlands | |
National Aeronautics and Space Administration (NASA), United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7713/the-tess-view-of-lofar-radio-emitting-stars
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