SCExAO VAMPIRES的微分散斑偏振法

IF 1.7 3区工程技术 Q2 ENGINEERING, AEROSPACE

Journal of Astronomical Telescopes Instruments and Systems Pub Date : 2023-04-01 DOI:10.1117/1.JATIS.9.2.028005

B. Safonov, M. Millar-Blanchaer, Manxuan Zhang, B. Norris, O. Guyon, J. Lozi, Steph Sallum

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引用次数: 0

摘要

摘要一个物体的微分偏振可见度RQ和RU是它的可见度对应于正交偏振的比值，干涉测量类似于斯托克斯Q和U强度图像。差偏振可见度的测量可用于在进料望远镜衍射极限分辨率下约束年轻或演化恒星的星周包层内部。我们演示了利用SCExAO VAMPIRES通过8米斯巴鲁望远镜的全瞳使用差分散斑偏振技术获得的数据对RQ和RU的振幅和相位的估计。讨论了仪器极化效应引起的偏差校正。利用VAMPIRES测量RQ和RU的精度受到仪器极化知识不完善的限制，达到5 × 10−3。

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Differential speckle polarimetry with SCExAO VAMPIRES

Abstract. The differential polarization visibilities RQ and RU of an object are the ratios of its visibilities corresponding to orthogonal polarizations, the interferometric analogs to Stokes Q and U intensity images. The measurement of differential polarization visibilitites can be used for constraining inner parts of circumstellar envelopes of young or evolved stars at the diffraction limited resolution of the feeding telescope. We demonstrate the estimation of both amplitude and phase of RQ and RU from data obtained using SCExAO VAMPIRES through the full pupil of the 8-m Subaru telescope using the differential speckle polarimetry technique. The correction for biases arising due to instrumental polarization effects is discussed. The accuracy of RQ and RU measurement with VAMPIRES is limited by imperfect knowledge of instrumental polarization and amounts to 5 × 10 − 3.

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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.