The Strange Case of OGLE-SMC-ECL-0277

IF 2 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Acta Astronomica Pub Date : 2017-09-01 DOI:10.32023/0001-5237/67.3.3

P. Zasche, M. Wolf, J. Vraštil, P. Fatka, A. Galád, K. Hornoch, Zdeněk Janák, J. Janík, Eva Kortusová, P. Kurfürst, P. Kušnirák, E. Paunzen, L. Řezba, V. Votruba, M. Zejda, P. Zieliński

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引用次数: 0

Abstract

The eclipsing system OGLE-SMC-ECL-0277 was found to exhibit unusual photometric variability. Beside its eclipsing nature additional variations with the periodicity of about 1500 d are also seen. Variations of the eclipse depth during the time span of the observational data (mainly taken from the OGLE survey, partly our new ones) are the most pronounced. The complex behavior of all these changes makes this system absolutely unique, no such variability was ever detected and studied in other systems before. Hence, are there some new phenomena, new physics or an unknown effects playing a role? We tried to understand these variations using four different hypotheses (i.e. inclination change, spot evolution, and/or pulsation of one or both components) and comparing their results we discussed which of them is the most likely. Neither of the presented hypotheses is able to describe in detail the behavior of OGLE-SMC-ECL-0277. We also discuss a possibility that the variable can be a member of the so-called double periodic variables group.

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OGLE-SMC-ECL-0277的奇怪案例

食光系统OGLE-SMC-ECL-0277被发现表现出不同寻常的光度变化。除了其食光性质外，还可以看到周期约为1500天的其他变化。在观测数据（主要来自OGLE调查，部分来自我们的新数据）的时间跨度内，日食深度的变化最为明显。所有这些变化的复杂行为使这个系统绝对独特，以前在其他系统中从未检测到和研究过这种可变性。因此，是否有一些新现象、新物理或未知效应在起作用？我们试图使用四种不同的假设（即倾斜变化、斑点进化和/或一个或两个成分的脉动）来理解这些变化，并比较它们的结果，我们讨论了其中哪种最有可能。所提出的假设都不能详细描述OGLE-SMC-ECL-0277的行为。我们还讨论了一种可能性，即该变量可以是所谓的双周期变量群的一员。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Astronomica 地学天文-天文与天体物理

CiteScore

3.40

自引率

4.50%

发文量

审稿时长

>12 weeks

期刊介绍： Information not localized