HD15082b, a short-period planet orbiting an A-star
HD15082b, a short-period planet orbiting an A-star
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HD15082b，一颗绕 A 星运行的短周期行星
DOI：
10.1051/epjconf/20101102003
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
K. Reif
中科院分区：
文献类型：
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作者：
E. Guenther;A. Cameron;B. Smalley;F. Rodler;N. Lodieu;M. Endl;K. Reif
大多数已知的凌日系外行星都围绕缓慢旋转的 F、G 或 K 恒星运行。在此，我们报告了 SuperWASP 最近探测到一颗围绕明亮、快速旋转的 A5 星 HD15082 运行的凌日行星。在凌日过程中进行的时间分辨光谱观测显示，行星越过线剖面时出现了一个驼峰。通过对光谱的分析，我们得出了行星的半径，并发现它相对于恒星的自转逆行运行。由于它与 A5 恒星的距离很短，这颗行星一定是已知最热的行星之一，这使得在红外中相对容易检测到它。因此我们尝试使用 TNG 来检测它，但没有成功。使用直接成像，我们寻找可能的同伴，并找到了一名候选者。
Most of the known transiting extrasolar planets orbit slowly rotating F, G or K stars. In here we report on the detection of a transiting planet orbiting the bright, rapidly rotating A5 star HD15082, recently made by SuperWASP. Time resolved spectroscopic observations taken during transit show a hump caused by the planet crossing the line profile. From the analysis of the spectra, we derive the radius of the planet and find that it is orbiting retrograde in respect to the spin of the star. Because of its small distance from an A5 star, this planet must be one of the hottest planets known, which makes it relatively easy to detect it in the IR. We thus tried to detect it using the TNG but did not succeed. Using direct imaging, we search for possible companions, and found one candidate.