研究绕 WD 1145+017 飞行的外行星

Contributions of the Astronomical Observatory Skalnaté Pleso Pub Date : 2024-02-01 DOI:10.31577/caosp.2024.54.2.98

A. Maliuk, J. Budaj, D. Mkrtichian, Z. Garai, S. Zharikov, T. Pribulla, R. Komžík, A. Kusakin, L. Shestakova, R. Kokumbaeva, I. Reva, S. Joshi, A. Valeev, D. Gadelshin, G. Valyavin, N. A-thano, R. Mennickent, A. Serebryanskiy, T.G. Kaye

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摘要

.WD 1145+017 是已知的第一个被解体的外行星环绕的白矮星。它是一颗以氦为主的白矮星，光谱中含有金属线，并有多变的不对称凌日现象。通过对 WD 1145 光曲线的分析，我们可以确定至少有 8 个天体周期性地与这颗恒星相食，周期从 4.490 小时到 4.493 小时不等。瀑布图显示其中一些周期并不稳定。对凌日深度的估算使我们有可能评估分解率。我们估算出了与这些天体相关的尘埃质量的下限，它表现出随时间变化的特征，在大约 2 - 3 × 10 14 千克的范围内波动。

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Studying of exoasteroids orbiting around WD 1145+017

. WD 1145+017 is the ﬁrst white dwarf known to be orbited by disintegrating exoasteroids. It is a helium-dominated white dwarf with lines of metals in spectra and variable asymmetric transits. The analysis of WD 1145 light curve allowed us to identify at least 8 bodies which periodically eclipse the star, showing periods ranging from 4.490 to 4.493 hours. Waterfall diagram shows that some of these periods are not stable. Estimating transit depths gave us possibility to assess the disintegration rate. We have estimated the lower limit of dust masses associated with these bodies, which exhibits time-varying characteristics, ﬂuctuating within the range of approximately 2 − 3 × 10 14 kg.

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Contributions of the Astronomical Observatory Skalnaté Pleso

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