111天周期行星HD 80606 b的主要transit的光度和光谱探测
Photometric and spectroscopic detection of the primary transit of the 111-day-period planet HD 80606 b
摘要：
我们报告的主要凌日的太阳系外行星HD 80606 b的检测，由于光度和光谱观测进行在天文台上普罗旺斯，同时与CCD相机在120厘米望远镜和苏菲摄谱仪在193厘米望远镜。我们观察了过境的整个出口和部分中心部分，在两个数据集中具有相同的时间。入侵发生在日落之前，没有被观察到。整个凌日持续时间为9.5至17.2小时。这些数据允许测量行星半径（Rp = 0.9 +- 0.1 RJup）和系统的其他参数。径向速度的测量显示了探测到的一个Rossiter-McLaughlin效应，并提供了一个自旋轨道不对准的提示。如果得到证实，这种错位将证实HD 80606 b的不寻常轨道结构是由于Kozai迁移的假设。HD 80606 b是迄今为止发现的周期最长的凌日行星。它异常小的半径强化了行星半径和从恒星接收到的入射通量之间的观测关系，并为理论提出了新的问题。它围绕着一颗相当明亮的恒星（V=9）运行，为许多后续研究提供了机会。
英文摘要：
We report the detection of the primary transit of the extra-solar planet HD 80606 b, thanks to photometric and spectroscopic observations performed at Observatoire de Haute-Provence, simultaneously with the CCD camera at the 120-cm telescope and the SOPHIE spectrograph at the 193-cm telescope. We observed the whole egress of the transit and partially its central part, in both data sets with the same timings. The ingress occurred before sunset and was not observed. The full duration of the transit was between 9.5 and 17.2 hours. The data allows the planetary radius to be measured (Rp = 0.9 +- 0.1 RJup) and other parameters of the system to be refined. Radial velocity measurements show the detection of a prograde Rossiter-McLaughlin effect, and provide a hint for a spin-orbit misalignment. If confirmed, this misalignment would corroborate the hypothesis that HD 80606 b owes its unusual orbital configuration to Kozai migration. HD 80606 b is by far the transiting planet on the longest period detected today. Its unusually small radius reinforces the observed relationship between the planet radius and the incident flux received from the star and opens new questions for theory. Orbiting a quite bright star (V=9), it opens opportunities to numerous follow-up studies.
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。
