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arXiv 1410.4286astro-ph.EP
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若干热辐射源的近红外热辐射探测及地基近红外Photometry系统学

Near-infrared Thermal Emission Detections of a number of hot Jupiters and the Systematics of Ground-based Near-infrared Photometry

Bryce Croll, Loic Albert, Ray Jayawardhana, Michael Cushing, Claire Moutou, David Lafreniere, John Asher Johnson, Aldo S. Bonomo, Magali Deleuil, Jonathan Fortney

摘要:

本文利用加拿大-法国-夏威夷望远镜(CFHT)上的宽视场红外相机(WIRCam)对三颗热矮星和一颗棕矮星的近红外热辐射进行了探测。其中包括KS波段对热彗星WASP-3b和Qatar-1b以及褐矮星KELT-1b的二次日食探测。我们还报告了Y波段,$K_{CONT}$波段,和两个新的和一个重新分析的KS波段探测热木星WASP-12 b的热辐射。我们提出了一个新的减少管道CFHT/WIRCam数据,这是优化高精度测光。我们还描述了新的技术,用于约束地面近红外测光的系统误差,以便返回可靠的二次日食深度和不确定性。我们讨论了我们的地基测光的噪声特性的波长跨越近红外(YJHK波段),微弱和明亮的恒星,并为同一对象在几个场合。对于热彗星WASP-3b和WASP-12 b,我们证明了我们在KS波段的日食深度测量的可重复性;因此,我们对地基近红外测光的系统学进行了严格的限制,并且还排除了在我们观测的时代,这两个热彗星的深层高压大气中的剧烈天气变化。

英文摘要:

We present detections of the near-infrared thermal emission of three hot Jupiters and one brown-dwarf using the Wide-field Infrared Camera (WIRCam) on the Canada-France-Hawaii Telescope (CFHT). These include Ks-band secondary eclipse detections of the hot Jupiters WASP-3b and Qatar-1b and the brown dwarf KELT-1b. We also report Y-band, $K_{CONT}$-band, and two new and one reanalyzed Ks-band detections of the thermal emission of the hot Jupiter WASP-12b. We present a new reduction pipeline for CFHT/WIRCam data, which is optimized for high precision photometry. We also describe novel techniques for constraining systematic errors in ground-based near-infrared photometry, so as to return reliable secondary eclipse depths and uncertainties. We discuss the noise properties of our ground-based photometry for wavelengths spanning the near-infrared (the YJHK-bands), for faint and bright-stars, and for the same object on several occasions. For the hot Jupiters WASP-3b and WASP-12b we demonstrate the repeatability of our eclipse depth measurements in the Ks-band; we therefore place stringent limits on the systematics of ground-based, near-infrared photometry, and also rule out violent weather changes in the deep, high pressure atmospheres of these two hot Jupiters at the epochs of our observations.

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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