Commissioning observations of HD 189733 with the PAlomar Radial Velocity Instrument

IF 1.7 3区工程技术 Q2 ENGINEERING, AEROSPACE

Journal of Astronomical Telescopes Instruments and Systems Pub Date : 2023-07-01 DOI:10.1117/1.JATIS.9.3.038006

B. Cale, Aurora Kesseli, C. Beichman, G. Vasisht, Rose K. Gibson, R. Oppenheimer, J. Fucik, Dimitri Mawet, Christopher Paine, Kittrin Matthews, Thomas Lockhart, Samuel Halverson, Boqiang Shen, Mahmood Bagheri, S. Leifer, P. Plavchan, David Hover

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Abstract

Abstract. The PAlomar Radial Velocity Instrument (PARVI) is a diffraction-limited, high-resolution spectrograph connected by single-mode fiber to the 200 inch Hale telescope at Palomar Observatory. Here, we present on-sky results for HD 189733 obtained during PARVI’s commissioning phase. We first describe the implementation of our spectral extraction and radial velocity (RV) generation codes. Through RV monitoring, we detect the Rossiter–Mclaughlin signal of the transiting planet HD 189733 b. We further detect the presence of water and carbon monoxide in the atmosphere of HD 189733 b via transmission spectroscopy. This work demonstrates PARVI’s high-resolution spectral capabilities at H band and current intra-night Doppler stability of ∼4 to 10 m s − 1 on an early K dwarf. Finally, we discuss the limitations to this work and ongoing efforts to characterize and improve the Doppler performance of PARVI to the design goal of ∼1 m s − 1 for late-type stars.

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用帕洛玛径向速度仪对hd189733进行调试观测

摘要帕洛玛径向速度仪(PARVI)是一个衍射受限的高分辨率光谱仪，通过单模光纤连接到帕洛玛天文台的200英寸黑尔望远镜。在这里，我们展示了在PARVI调试阶段获得的HD 189733的天空结果。我们首先描述了我们的光谱提取和径向速度(RV)生成代码的实现。通过RV监测，我们探测到凌日行星HD 189733 b的Rossiter-Mclaughlin信号，并通过透射光谱进一步探测到HD 189733 b大气中存在水和一氧化碳。这项工作证明了PARVI在H波段的高分辨率光谱能力，以及目前在早期K矮星上的夜间多普勒稳定性为~ 4到10 m s−1。最后，我们讨论了这项工作的局限性和正在进行的努力，以表征和提高PARVI的多普勒性能，以达到对晚型恒星的设计目标~ 1 m s−1。

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来源期刊

Journal of Astronomical Telescopes Instruments and Systems Engineering-Mechanical Engineering

CiteScore

4.40

自引率

13.00%

发文量

119

期刊介绍： The Journal of Astronomical Telescopes, Instruments, and Systems publishes peer-reviewed papers reporting on original research in the development, testing, and application of telescopes, instrumentation, techniques, and systems for ground- and space-based astronomy.