An investigation of the tidally driven period changes in detached binary systems through O-C time series analysis: the case of RT And and WY Cnc †

Q4 Physics and Astronomy
N. Nanouris, A. Kalimeris, E. Antonopoulou
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引用次数: 0

Abstract

Detached binary systems are subjected to a variety of physical mechanisms which are able to change their period in a continuous way and in a broad band of timescales. Assuming that these changes should be detectable in O–C diagrams in a way specified by the physical theory of the underlying mechanisms, we carry out a preliminary study in a properly selected sample of detached binaries, where no mass transfer is expected. We are primarily interested in finding traces of tidal moments in observed orbital period changes (possibly coupled with stellar wind angular momentum losses). We focus our attempts on two short-period chromospherically active binaries (RT And and WY Cnc), whose expected period changes rates are found to be close to those derived by means of time series analysis. Emphasis is also given to systems which show a remarkably constant orbital period, in disagreement with the values expected by theory. †This paper was originally due to be published in the Special Issue: Close Binary Stars in Mod...
用O-C时间序列分析分离双星系统潮汐驱动周期变化的研究:以RT和WY Cnc为例
分离的二元系统受到各种物理机制的影响,这些物理机制能够以连续的方式和宽频带的时间尺度改变其周期。假设这些变化应该以潜在机制的物理理论指定的方式在O-C图中检测到,我们在适当选择的分离二元样本中进行初步研究,其中没有传质预期。我们主要感兴趣的是在观测到的轨道周期变化中寻找潮汐时刻的痕迹(可能与恒星风角动量损失相结合)。我们将重点放在两个短周期色球活性双星(RT And和WY Cnc)上,发现它们的预期周期变化率与通过时间序列分析得出的结果接近。重点还放在轨道周期非常恒定的系统上,这与理论所期望的值不一致。†本文最初将发表在特刊:Close Binary Stars in Mod…
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来源期刊
Astronomical and Astrophysical Transactions
Astronomical and Astrophysical Transactions Physics and Astronomy-Instrumentation
CiteScore
0.40
自引率
0.00%
发文量
16
期刊介绍: Astronomical and Astrophysical Transactions (AApTr) journal is being published jointly by the Euro-Asian Astronomical Society and Cambridge Scientific Publishers, The journal provides a forum for the rapid publication of material from all modern and classical fields of astronomy and astrophysics, as well as material concerned with astronomical instrumentation and related fundamental sciences. It includes both theoretical and experimental original research papers, short communications, review papers and conference reports.
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