基特峰国家天文台观测到的太阳系外行星凌日
Extrasolar Planet Transits Observed at Kitt Peak National Observatory
摘要：
2008年10月至2011年10月期间，我们使用FLAMINGOS红外相机在2.1米基特峰国家天文台望远镜上获得了已知太阳系外行星凌日系统的J，H和JH波段测光。从导出的光变曲线中，我们提取了这些事件的过境时间，过境深度和过境持续时间。所获得的精确的中渡时间有助于改善轨道周期，也限制了系统的渡越时间变化。在大多数情况下，公布的系统参数成功地占我们观察到的光变曲线，但在某些情况下，我们得到改进的行星半径和轨道周期。我们补充了我们的2.1米红外观测CCD z '波段和B波段测光（加上两个氢阿尔法滤波器观测）获得的基特峰游客中心望远镜，并在2007年10月观察到四个H波段凌日与国家统计局的1.6米麦克马思-皮尔斯太阳望远镜。我们的结果的主要亮点是：1）我们的J波段行星半径系综与光学半径一致，最佳拟合关系为：（Rp/R ~*）J = 0.0017 + 0.979（Rp/R ~*）光学参数。2）在WASP-11/HAT-P-10凌日过程中观测到星点交叉现象。3）在HAT-P-11b凌日过程中观测到星点交叉现象（开普勒-3b），从而证实，即使在开普勒任务结束后，恒星活动区的磁演化也可以被监测到，4）我们确认HAT-P-27/WASP-40的掠凌。我们总共展示了32个已知系外行星系统的57次单独凌日。
英文摘要：
We obtained J-, H- and JH-band photometry of known extrasolar planet transiting systems at the 2.1-m Kitt Peak National Observatory Telescope using the FLAMINGOS infrared camera between October 2008 and October 2011. From the derived lightcurves we have extracted the mid-transit times, transit depths and transit durations for these events. The precise mid-transit times obtained help improve the orbital periods and also constrain transit-time variations of the systems. For most cases the published system parameters successfully accounted for our observed lightcurves, but in some instances we derive improved planetary radii and orbital periods. We complemented our 2.1-m infrared observations using CCD z'-band and B-band photometry (plus two Hydrogen Alpha filter observations) obtained with the Kitt Peak Visitor's Center telescope, and with four H-band transits observed in October 2007 with the NSO's 1.6-m McMath-Pierce Solar Telescope. The principal highlights of our results are: 1) our ensemble of J-band planetary radii agree with optical radii, with the best-fit relation being: (Rp/R*)J = 0.0017 + 0.979 (Rp/R*)optical, 2) We observe star spot crossings during the transit of WASP-11/HAT-P-10, 3) we detect star spot crossings by HAT-P-11b (Kepler-3b), thus confirming that the magnetic evolution of the stellar active regions can be monitored even after the Kepler mission has ended, and 4) we confirm a grazing transit for HAT-P-27/WASP-40. In total we present 57 individual transits of 32 known exoplanet systems.
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