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arXiv 0804.2674astro-ph
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行星凌日事件的结束阶段特征

Closure Phase Signatures of Planet Transit Events

G. T. van Belle

摘要:

行星凌日事件是光学干涉仪提供的超高分辨率能力的有吸引力的目标。本文提出了一个评估的可能性,检测这些事件通过测量高精度的关闭阶段与MIRC仪器的CHARA阵列。利用现有的仪器能力,以及其他系统参数的表征,如恒星半径、行星半径和凌日事件的其他参数,可以很容易地恢复凌日位置在天空中的角度。这种技术是目前唯一可用的,可以提供过境行星的轨道平面位置角,并可以直接确定行星的半径独立于任何外部观测,似乎能够大大提高对该半径的其他确定。其他直接观测到的参数--也不依赖于凌日测光或光谱学--包括碰撞参量、凌日进入时间、凌日速度和恒星半径。

英文摘要:

Planet transit events present as attractive targets for the ultra-high-resolution capabilities afforded by optical interferometers. Herein is presented an evaluation of the possibility of detection of such events through measurement of high-precision closure phases with the MIRC instrument on the CHARA Array. Recovery of the transit position angle upon the sky appears readily achievable with the existing capabilities of the instrument, along with characterization of other system parameters, such as stellar radius, planet radius, and other parameters of the transit event. This technique is the only one presently available that can provide a transiting planet's orbital plane position angle, and can directly determine the planet's radius independent of any outside observations, appearing able to improve substantially upon other determinations of that radius. Additional directly observed parameters - also not dependent upon transit photometry or spectroscopy - include impact parameter, transit ingress time, transit velocity and stellar radius.

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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