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New Observations And A Possible Detection Of Parameter Variations In The Transits Of Gliese 436b

机译:Gliese 436b运输中的新发现和参数变化的可能检测

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We present ground-based observations of the transiting Neptune-mass planet Gl 436b obtained with the 3.5 m telescope at Apache Point Observatory and other supporting telescopes. Included in this is an observed transit in early 2005, over 2 years before the earliest reported transit detection. We have compiled all available transit data to date and perform a uniform modeling using the JKTEBOP code. We do not detect any transit timing variations of amplitude greater than ~1 minute over the ~3.3 year baseline. We do however find possible evidence for a self-consistent trend of increasing orbital inclination, transit width, and transit depth, which supports the supposition that Gl 436b is being perturbed by another planet of (≤)12 M_⊕ in a nonresonant orbit.
机译:我们介绍了使用3.5 m望远镜在Apache Point天文台和其他辅助望远镜获得的海王星质量恒星Gl 436b的地面观测资料。其中包括2005年初的观测到的过境,距离最早报告的过境检测早2年。到目前为止,我们已经编译了所有可用的运输数据,并使用JKTEBOP代码执行了统一的建模。我们没有发现在〜3.3年基线上振幅大于〜1分钟的任何运输时间变化。然而,我们确实找到了可能的证据,证明了轨道倾角,传播宽度和传播深度增加的自洽趋势,这支持了假设Gl 436b被非谐振轨道上的另一个(≤)12M_⊕行星干扰。

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