Volume 629, September 2019
|Number of page(s)||6|
|Section||Stellar structure and evolution|
|Published online||22 August 2019|
X-ray emission in the enigmatic CVSO 30 system
Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany
2 Astronomical Institute ASCR, Fricova 298, 25165 Ondrejov, Czech Republic
Accepted: 8 June 2019
CVSO 30 is a young, active, weak-line T Tauri star; it possibly hosts the only known planetary system with both a transiting hot-Jupiter and a cold-Jupiter candidate (CVSO 30 b and CVSO 30 c). We analyzed archival ROSAT, Chandra, and XMM-Newton data to study the coronal emission in the system. According to our modeling, CVSO 30 shows a quiescent X-ray luminosity of ≈8 × 1029 erg s−1. The X-ray absorbing column is consistent with interstellar absorption. XMM-Newton observed a flare, during which a transit of the candidate CVSO 30 b was expected, but no significant transit-induced variation in the X-ray flux is detectable. While the hot-Jupiter candidate CVSO 30 b has continuously been undergoing mass loss powered by the high-energy irradiation, we conclude that its evaporation lifetime is considerably longer than the estimated stellar age of 2.6 Myr.
Key words: stars: individual: CVSO 30 / planetary systems / X-rays: stars / stars: flare
© ESO 2019
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