Minute-Cadence Observations of the LAMOST Fields with the TMTS: IV—Catalog of Cataclysmic Variables from the First 3-yr Survey

The Tsinghua University–Ma Huateng Telescopes for Survey (TMTS) started to monitor the LAMOST plates in 2020, leading to the discovery of numerous short-period eclipsing binaries, peculiar pulsators, flare stars, and other variable objects. Here, we present the uninterrupted light curves for a sample of 64 cataclysmic variables (CVs) observed/discovered using the TMTS during its first three-year observations, and we introduce new CVs and new light-variation periods (from known CVs) revealed through the TMTS observations. Thanks to the high-cadence observations of TMTS, diverse light variations, including superhumps, quasi-periodic oscillations, large-amplitude orbital modulations, and rotational modulations, are able to be detected in our CV samples, providing key observational clues for understanding the fast-developing physical processes in various CVs. All of these short-timescale light-curve features help further classify the subtypes of CV systems. We highlight the light-curve features observed in our CV sample and discuss further implications of minute-cadence light curves for CV identifications and classifications. Moreover, we examine the Hα emission lines in the spectra from our nonmagnetic CV samples (i.e., dwarf novae and nova-like subclasses) and find that the distribution of Hα emission strength shows significant differences between the sources with orbital periods above and below the period gap, which agrees with the trend seen from the SDSS nonmagnetic CV sample.

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Journal
Universe
Published
2024-08-23
DOI
https://doi.org/10.3390/universe10090337
Citations
2
Primary Topic
Astrophysical Phenomena and Observations
Type
article
Field-Weighted Citation Impact
0.66

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article

Minute-Cadence Observations of the LAMOST Fields with the TMTS: IV—Catalog of Cataclysmic Variables from the First 3-yr Survey

Qiqi Xia, Weili Lin, Xiaoran Ma, Gaici Li et al.
2 citations
Universe
Astrophysical Phenomena and Observations
0.66
article

Minute-Cadence Observations of the LAMOST Fields with the TMTS: IV—Catalog of Cataclysmic Variables from the First 3-yr Survey

Qiqi Xia, Weili Lin, Xiaoran Ma, Gaici Li, Yi Yang, Danfeng Xiang, Haowei Peng, Yongzhi Cai, Jialian Liu, A. V. Filippenko, Kishore C. Patra, Shengyu Yan, Liyang Chen, Jie Lin, Thomas G. Brink, Yongkang Sun, Wenxiong Li, Xiaofeng Wang, Zhihao Chen, Jicheng Zhang, Miao Cheng, Fangzhou Guo, Xiaojun Jiang, Qichun Liu, Jun Mo, Gaobo Xi, Zhibin Dai
article en
2 citations

Abstract

The Tsinghua University–Ma Huateng Telescopes for Survey (TMTS) started to monitor the LAMOST plates in 2020, leading to the discovery of numerous short-period eclipsing binaries, peculiar pulsators, flare stars, and other variable objects. Here, we present the uninterrupted light curves for a sample of 64 cataclysmic variables (CVs) observed/discovered using the TMTS during its first three-year observations, and we introduce new CVs and new light-variation periods (from known CVs) revealed through the TMTS observations. Thanks to the high-cadence observations of TMTS, diverse light variations, including superhumps, quasi-periodic oscillations, large-amplitude orbital modulations, and rotational modulations, are able to be detected in our CV samples, providing key observational clues for understanding the fast-developing physical processes in various CVs. All of these short-timescale light-curve features help further classify the subtypes of CV systems. We highlight the light-curve features observed in our CV sample and discuss further implications of minute-cadence light curves for CV identifications and classifications. Moreover, we examine the Hα emission lines in the spectra from our nonmagnetic CV samples (i.e., dwarf novae and nova-like subclasses) and find that the distribution of Hα emission strength shows significant differences between the sources with orbital periods above and below the period gap, which agrees with the trend seen from the SDSS nonmagnetic CV sample.

UniverseVol. 10(9)
University of Science and Technology of China (CN), Xiamen University (CN), Chinese Academy of Sciences (CN), Beijing Normal University (CN), Yunnan Observatories (CN), National Astronomical Observatories (CN), University of Chinese Academy of Sciences (CN), University of California, Berkeley (US), Tsinghua University (CN)
National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Alfred P. Sloan Foundation, California Institute of Technology, Northwestern University, University of Utah, University of Washington, Space Telescope Science Institute, European Space Agency, University of Warwick, Trinity College Dublin, National Natural Science Foundation of China, Chinese Academy of Sciences, Ministry of Science and Technology, Taiwan, Stockholms Universitet, National Development and Reform Commission, Office of Science, Deutsches Elektronen-Synchrotron, Institut National de Physique Nucléaire et de Physique des Particules
Openalex Percentile: Top 28%
Astrophysical Phenomena and Observations
0.66
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