arXiv 2212.044242022-12-08astro-ph.SRastro-ph.HE

激变变星的TESS光变曲线-- II：老新星和新星变星中的超级峰

TESS light curves of cataclysmic variables -- II: Superhumps in old novae and novalike variables

Albert Bruch

DOI：: 10.1093/mnras/stac3493

摘要：

超级峰是激变变星光变曲线中观测到的丰富的变星现象之一。它们有正负两种形式，分别是周期比这些相互作用的双星系统的轨道周期稍长或稍短。正的超驼峰在SU~UMa型短周期矮新星的超爆发中普遍存在，但在长周期的吸积盘处于永久亮态的系统（如新星变星和大多数老新星）中不太常见。负超峰似乎并不对特定类型的CV没有偏好。在这里，我利用TESS为大量恒星提供的长的高节奏光变曲线，选择所有旧的新星和新星变星，这些变星具有过去报道的超级驼峰，TESS光变曲线可用，并且在以前的出版物中尚未进行分析，以研究它们的超级驼峰行为。结合从文献中获得的信息，这些结果使我们能够编制迄今为止这些恒星中最完整的超级驼峰普查。作为一个推论，在本样本的对象日食系统日食历元来自TESS光变曲线，并在某些情况下从档案光变曲线列出，并用于更新轨道星历和讨论周期的变化。

英文摘要：

Superhumps are among the abundant variable phenomena observed in the light curves of cataclysmic variables (CVs). They come in two flavours as positive and negative superhumps, distinguished by periods slightly longer or shorter, respectively, than the orbital periods of these interacting binary systems. Positive superhumps are ubiquitous in superoutbursting short period dwarf novae of the SU~UMa type but are less common in longer period systems with accretion disks in a permanent bright state such as novalike variables and most old novae. Negative superhumps do not seem not to have a preference for a particular type of CV. Here, I take advantage of the long high cadence light curves provided by TESS for huge number of stars, selecting all old novae and novalike variables with past reported superhumps for which TESS light curves are available and have not yet been analysed in previous publications in order to study their superhump behaviour. In combination with information taken from the literature the results enable to compile the most complete census of superhumps in these stars so far. As a corollary, for the eclipsing systems in the present sample of objects eclipse epochs derived from the TESS light curves and in some cases from archival light curves are listed and used to update orbital ephemeris and to discuss period changes.

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