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arXiv 1012.2977astro-ph.EP
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WASP-41 b:一颗围绕磁活跃的G8V恒星运行的过境热木星行星

WASP-41b: A transiting hot Jupiter planet orbiting a magnetically-active G8V star

P. F. L. Maxted, D. R. Anderson, A. Collier Cameron, C. Hellier, D. Queloz, B. Smalley, R. A. Street, A. H. M. J. Triaud, R. G. West, M. Gillon, T. A. Lister, F… 展开作者

P. F. L. Maxted, D. R. Anderson, A. Collier Cameron, C. Hellier, D. Queloz, B. Smalley, R. A. Street, A. H. M. J. Triaud, R. G. West, M. Gillon, T. A. Lister, F. Pepe, D. Pollacco, D. Segransan, A. M. S. Smith, S. Udry

摘要:

我们发现了一颗轨道周期为3.05d的凌日行星,它围绕恒星TYC 7247 - 587 - 1运行。WASP-41是一颗中等亮度的G8V恒星(V = 11.6),金属丰度接近太阳([Fe/H]=-0.08 +-0.09)。这颗恒星显示出色球层有中等活动的证据,包括Ca II H和K线核心的辐射和光度变化,周期为18.4 d,振幅约为1%。我们使用一种新的方法来定量地表明,这种周期信号具有低虚警概率。恒星的自转周期意味着WASP-41的陀螺年代学年龄为1.8 Gyr,误差约为15%。我们综合分析了现有的测光和分光数据,得出了该行星的质量和半径(0.92 ± 0.06M_2,1.20 ± 0.06R_Jup)。对WASP-41的进一步观测可以用来探索热木星行星的性质与其宿主恒星色球活动水平之间的联系。

英文摘要:

We report the discovery of a transiting planet with an orbital period of 3.05d orbiting the star TYC 7247-587-1. The star, WASP-41, is a moderately bright G8V star (V=11.6) with a metallicity close to solar ([Fe/H]=-0.08+-0.09). The star shows evidence of moderate chromospheric activity, both from emission in the cores of the CaII H and K lines and photometric variability with a period of 18.4d and an amplitude of about 1%. We use a new method to show quantitatively that this periodic signal has a low false alarm probability. The rotation period of the star implies a gyrochronological age for WASP-41 of 1.8Gyr with an error of about 15%. We have used a combined analysis of the available photometric and spectroscopic data to derive the mass and radius of the planet (0.92+-0.06M_Jup, 1.20+-0.06R_Jup). Further observations of WASP-41 can be used to explore the connections between the properties of hot Jupiter planets and thelevel of chromospheric activity in their host stars.

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。

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