Minute-Cadence Observations of the LAMOST Fields with the TMTS: II. Catalogues of Short-Period Variable Stars from the First Two-Year Surveys

Over the past few years, wide-field time-domain surveys like ZTF and OGLE have led to discoveries of various types of interesting short-period stellar variables, such as ultracompact eclipsing binary white dwarfs, rapidly rotating magnetised white dwarfs (WDs), transitional cataclysmic variables bet...

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Hauptverfasser: Lin, Jie, Wang, Xiaofeng, Mo, Jun, Gaobo Xi, Filippenko, Alexei V, Shengyu Yan, Brink, Thomas G, Yang, Yi, Wu, Chengyuan, Németh, Péter, Li, Gaici, Guo, Fangzhou, Guo, Jincheng, Cai, Yongzhi, Xiong, Heran, Zheng, WeiKang, Liu, Qichun, Zhang, Jicheng, Jiang, Xiaojun, Chen, Liyang, Xia, Qiqi, Peng, Haowei, Chen, Zhihao, Li, Wenxiong, Lin, Weili, Xiang, Danfeng, Ma, Xiaoran, Liu, Jialian
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container_title arXiv.org
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creator Lin, Jie
Wang, Xiaofeng
Mo, Jun
Gaobo Xi
Filippenko, Alexei V
Shengyu Yan
Brink, Thomas G
Yang, Yi
Wu, Chengyuan
Németh, Péter
Li, Gaici
Guo, Fangzhou
Guo, Jincheng
Cai, Yongzhi
Xiong, Heran
Zheng, WeiKang
Liu, Qichun
Zhang, Jicheng
Jiang, Xiaojun
Chen, Liyang
Xia, Qiqi
Peng, Haowei
Chen, Zhihao
Li, Wenxiong
Lin, Weili
Xiang, Danfeng
Ma, Xiaoran
Liu, Jialian
description Over the past few years, wide-field time-domain surveys like ZTF and OGLE have led to discoveries of various types of interesting short-period stellar variables, such as ultracompact eclipsing binary white dwarfs, rapidly rotating magnetised white dwarfs (WDs), transitional cataclysmic variables between hydrogen-rich and helium accretion, and blue large-amplitude pulsators (BLAPs), which greatly enrich our understandings of stellar physics under some extreme conditions. In this paper, we report the first-two-year discoveries of short-period variables (i.e., P
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Catalogues of Short-Period Variable Stars from the First Two-Year Surveys</title><source>Freely Accessible Journals</source><source>arXiv.org</source><creator>Lin, Jie ; Wang, Xiaofeng ; Mo, Jun ; Gaobo Xi ; Filippenko, Alexei V ; Shengyu Yan ; Brink, Thomas G ; Yang, Yi ; Wu, Chengyuan ; Németh, Péter ; Li, Gaici ; Guo, Fangzhou ; Guo, Jincheng ; Cai, Yongzhi ; Xiong, Heran ; Zheng, WeiKang ; Liu, Qichun ; Zhang, Jicheng ; Jiang, Xiaojun ; Chen, Liyang ; Xia, Qiqi ; Peng, Haowei ; Chen, Zhihao ; Li, Wenxiong ; Lin, Weili ; Xiang, Danfeng ; Ma, Xiaoran ; Liu, Jialian</creator><creatorcontrib>Lin, Jie ; Wang, Xiaofeng ; Mo, Jun ; Gaobo Xi ; Filippenko, Alexei V ; Shengyu Yan ; Brink, Thomas G ; Yang, Yi ; Wu, Chengyuan ; Németh, Péter ; Li, Gaici ; Guo, Fangzhou ; Guo, Jincheng ; Cai, Yongzhi ; Xiong, Heran ; Zheng, WeiKang ; Liu, Qichun ; Zhang, Jicheng ; Jiang, Xiaojun ; Chen, Liyang ; Xia, Qiqi ; Peng, Haowei ; Chen, Zhihao ; Li, Wenxiong ; Lin, Weili ; Xiang, Danfeng ; Ma, Xiaoran ; Liu, Jialian</creatorcontrib><description>Over the past few years, wide-field time-domain surveys like ZTF and OGLE have led to discoveries of various types of interesting short-period stellar variables, such as ultracompact eclipsing binary white dwarfs, rapidly rotating magnetised white dwarfs (WDs), transitional cataclysmic variables between hydrogen-rich and helium accretion, and blue large-amplitude pulsators (BLAPs), which greatly enrich our understandings of stellar physics under some extreme conditions. In this paper, we report the first-two-year discoveries of short-period variables (i.e., P&lt;2 hr) by the Tsinghua University-Ma Huateng Telescopes for Survey (TMTS). TMTS is a multi-tube telescope system with a field of view up to 18 deg^2, which started to monitor the LAMOST sky areas since 2020 and generated uninterrupted minute-cadence light curves for about ten million sources within 2 years. Adopting the Lomb-Scargle periodogram with period-dependent thresholds for the maximum powers, we identify over 1 100 sources that exhibit a variation period shorter than 2 hr. Compiling the light curves with the Gaia magnitudes and colours, LAMOST spectral parameters, VSX classifications, and archived observations from other prevailing time-domain survey missions, we identified 1 076 as delta Scuti stars, which allows us study their populations and physical properties in the short-period regime. 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Catalogues of Short-Period Variable Stars from the First Two-Year Surveys</title><title>arXiv.org</title><description>Over the past few years, wide-field time-domain surveys like ZTF and OGLE have led to discoveries of various types of interesting short-period stellar variables, such as ultracompact eclipsing binary white dwarfs, rapidly rotating magnetised white dwarfs (WDs), transitional cataclysmic variables between hydrogen-rich and helium accretion, and blue large-amplitude pulsators (BLAPs), which greatly enrich our understandings of stellar physics under some extreme conditions. In this paper, we report the first-two-year discoveries of short-period variables (i.e., P&lt;2 hr) by the Tsinghua University-Ma Huateng Telescopes for Survey (TMTS). TMTS is a multi-tube telescope system with a field of view up to 18 deg^2, which started to monitor the LAMOST sky areas since 2020 and generated uninterrupted minute-cadence light curves for about ten million sources within 2 years. 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TMTS is a multi-tube telescope system with a field of view up to 18 deg^2, which started to monitor the LAMOST sky areas since 2020 and generated uninterrupted minute-cadence light curves for about ten million sources within 2 years. Adopting the Lomb-Scargle periodogram with period-dependent thresholds for the maximum powers, we identify over 1 100 sources that exhibit a variation period shorter than 2 hr. Compiling the light curves with the Gaia magnitudes and colours, LAMOST spectral parameters, VSX classifications, and archived observations from other prevailing time-domain survey missions, we identified 1 076 as delta Scuti stars, which allows us study their populations and physical properties in the short-period regime. The other 31 sources include BLAPs, subdwarf B variables (sdBVs), pulsating WDs, ultracompact/short-period eclipsing/ellipsoidal binaries, cataclysmic variables below the period gap, etc., which are highly interesting and worthy of follow-up investigations.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.2303.18050</doi><oa>free_for_read</oa></addata></record>
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subjects Cataclysmic variables
Deposition
Eclipsing binary stars
Light curve
Physical properties
Physics - High Energy Astrophysical Phenomena
Physics - Instrumentation and Methods for Astrophysics
Physics - Solar and Stellar Astrophysics
Sky surveys (astronomy)
Stellar physics
Telescopes
Time domain analysis
Variable stars
Variables
White dwarf stars
title Minute-Cadence Observations of the LAMOST Fields with the TMTS: II. Catalogues of Short-Period Variable Stars from the First Two-Year Surveys
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