关于 C/2023 P1 彗星（Nishimura）中极低的极化现象

Q1 Earth and Planetary Sciences

Monthly Notices of the Royal Astronomical Society: Letters Pub Date : 2023-11-28 DOI:10.1093/mnrasl/slad181

M. Zheltobryukhov, E. Zubko, E. Chornaya, A. Kochergin, D. Hines, G. Videen

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引用次数: 0

摘要

2023 年 9 月 6 日和 7 日，我们用 R 滤波器测量了 C/2023 P1 彗星（西村）的线性偏振程度。我们的观测结果表明，正极化的振幅极低。我们的模型表明，彗星彗尾中的主要物质是富含镁的硅酸盐尘埃粒子；而另一种解释是，彗星中如此低的正极化是由于其气体发射的去极化效应造成的。这两种不同的解释预示着在小相位角下会出现截然不同的偏振响应，可以在未来对 C/2023 P1 彗星（Nishimura）的偏振观测中加以区分。

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On the extremely low polarization in Comet C/2023 P1 (Nishimura)

On September 6 and 7 of 2023, we measured the degree of linear polarization of Comet C/2023 P1 (Nishimura) with the R filter. Our observations reveal an extremely low amplitude of positive polarization. Our modeling suggests Mg-rich silicate dust particles are the dominant species in the coma; whereas, an alternative explanation is that such low positive polarization in comets is attributed to the depolarizing effect of their gaseous emission. These two alternative explanations predict dramatically different polarimetric responses at small phase angle that can be discriminated in future polarimetric observations of Comet C/2023 P1 (Nishimura).

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来源期刊

Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science

CiteScore

8.80

自引率

0.00%

发文量

136

期刊介绍： For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.