The corona of GJ 1151 in the context of star-planet interaction
- The low-mass star GJ 1151 has been reported to display variable low-frequency radio emission, which has been interpreted as a signpost of coronal star-planet interactions with an unseen exoplanet. Here we report the first X-ray detection of GJ 1151's corona based on the XMM-Newton data. We find that the star displays a small flare during the X-ray observation. Averaged over the observation, we detect the star with a low coronal temperature of 1.6 MK and an X-ray luminosity of L-X = 5.5 x 10(26) erg s(-1). During the quiescent time periods excluding the flare, the star remains undetected with an upper limit of L-X,L- qui <= 3.7 x 10(26) erg s(-1). This is compatible with the coronal assumptions used in a recently published model for a star-planet interaction origin of the observed radio signals from this star.
| Author details: | Mary Grace FosterORCiDGND, Katja PoppenhägerORCiDGND, Julián David Alvarado-GómezORCiD, Jürgen SchmittORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1093/mnras/staa1982 |
| ISSN: | 0035-8711 |
| ISSN: | 1365-2966 |
| Title of parent work (English): | Monthly notices of the Royal Astronomical Society |
| Publisher: | Oxford Univ. Press |
| Place of publishing: | Oxford |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2020/07/09 |
| Publication year: | 2020 |
| Release date: | 2023/12/11 |
| Tag: | X-rays: individual: GJ 1151; planet; star interactions; stars: coronae |
| Volume: | 497 |
| Issue: | 1 |
| Number of pages: | 5 |
| First page: | 1015 |
| Last Page: | 1019 |
| Funding institution: | ESA Member StatesEuropean Space Agency; NASANational Aeronautics & Space; Administration (NASA); German Leibniz-Gemeinschaft [P67-2018] |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 52 Astronomie / 520 Astronomie und zugeordnete Wissenschaften |
| Peer review: | Referiert |
