TESS and AAVSO observations of the eclipsing Z Cam-type cataclysmic variable V416 Dra

IF 1.9 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

New Astronomy Pub Date : 2024-10-31 DOI:10.1016/j.newast.2024.102319

Hongfei Yang, Zhongtao Han, Weiwei Na, Hushan Xu, Tingting Yang

引用次数: 0

Abstract

We present a photometric analysis of the eclipsing Z Cam-type dwarf nova V416 Dra based on TESS and AAVSO data. The AAVSO light curve, spanning nearly 17 years, shows numerous outbursts recurring approximately every 20.2 and 38.6 days. We examined the amplitude vs. recurrence-time relation in V416 Dra, which appears to reflect the common characteristics of long outbursts in Z Cam stars. The TESS light curves revealed that V416 Dra is a shallow eclipse binary and shows some SU UMa-like superoutbursts, which may be related to the special structure of the accretion disk. The period-searching results show that there are the forest of peaks within the period range of 0.4–2.5 days, related to donor star’s activity. Moreover, we also find the presence of some typical quasi-periodic oscillation (QPO) signals with periods of 14–41 and 177–200 min, respectively. These results will help us locate the origin of the QPOs in V416 Dra accurately.

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TESS和美国天文观测台（AAVSO）对Z Cam型大灾变V416 Dra的蚀变观测

我们根据TESS和AAVSO的数据，对日食Z Cam型矮新星V416 Dra进行了光度分析。AAVSO的光变曲线跨越了近17年的时间，显示了大约每20.2天和38.6天发生一次的多次爆发。我们研究了V416 Dra的振幅与爆发时间的关系，这似乎反映了Z Cam星长爆发的共同特征。TESS光曲线显示，V416 Dra是一颗浅食双星，并出现了一些类似于SU UMa的超爆发，这可能与吸积盘的特殊结构有关。周期搜索结果表明，在0.4-2.5天的周期范围内存在着峰林，这与供体星的活动有关。此外，我们还发现了一些典型的准周期振荡（QPO）信号，周期分别为 14-41 分钟和 177-200 分钟。这些结果将有助于我们准确定位 V416 Dra 中 QPO 的起源。

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

New Astronomy 地学天文-天文与天体物理

CiteScore

4.00

自引率

10.00%

发文量

109

审稿时长

13.6 weeks

期刊介绍： New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation. New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.