arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1107.5940astro-ph.EP
收藏

寻找恒星与行星的相互作用

Search for star-planet interaction

Tereza Krejcova, Jan Budaj, Julius Koza

摘要:

本文分析了太阳系外行星的色球活动,寻找了Ca Ⅱ K线核的等效宽度与行星轨道参数之间的可能关系。我们发现了一个统计上显著的证据,即起源于恒星色球层的Ca II K线反转的等效宽度取决于系外行星的轨道周期P_orb。在T_eff < 5500 K和P_orb < 20天的恒星轨道上运行的行星通常比在类似温度下但轨道周期更长的行星有更强的辐射。P_orb=20天标志着行为的突然变化,这可能与恒星-行星相互作用的质的变化有关。

英文摘要:

We analyse the chromospherical activity of stars with extrasolar planets and search for a possible correlation between the equivalent width of the core of Ca II K line and orbital parameters of the planet. We found a statistically significant evidence that the equivalent width of the Ca II K line reversal, which originates in the stellar chromosphere depends on the orbital period P_orb of the exoplanet. Planets orbiting stars with T_eff < 5500 K and with P_orb < 20 days generally have much stronger emission than planets at similar temperatures but at longer orbital periods. P_orb=20 days marks a sudden change in behaviour, which might be associated with a qualitative change in the star-planet interaction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑