X-ray emission in the enigmatic CVSO 30 system
X-ray emission in the enigmatic CVSO 30 system
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DOI：
10.1051/0004-6361/201935351
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发表时间：
2019-07
影响因子：
6.5
通讯作者：
S. Czesla;P. Schneider;M. Salz;T. Klocova;T. Schmidt;J. Schmitt
中科院分区：
文献类型：
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作者：
S. Czesla;P. Schneider;M. Salz;T. Klocova;T. Schmidt;J. Schmitt
CVSO 30是一颗年轻、活跃、弱线的金牛座T星星;它可能是唯一已知的同时拥有凌日热木星和冷木星候选者的行星系统（CVSO 30 B和CVSO 30 c）。我们分析了档案ROSAT，钱德拉，和XMM-牛顿数据研究系统中的日冕发射。根据我们的模型，CVSO 30的静态X射线光度为108 × 1029 erg s−1。X射线吸收柱与星际吸收一致。XMM-牛顿观测到一个耀斑，在此期间，候选CVSO 30 B的过境是预期的，但没有显着的过境引起的X射线通量的变化是可检测的。虽然热木星候选者CVSO 30 B一直在经历由高能辐射提供动力的质量损失，但我们得出结论，它的蒸发寿命比估计的恒星年龄260万年长得多。
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.