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Joint Long-baseline Study Based on WASP, Kepler, and TESS: Revealing the Pulsation Characteristics of <i>δ</i> Scuti Star KIC 8712760

Jianwei YaoSchool of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaAli EsamdinSchool of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaHaozhi WangSchool of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaChenglong LvXinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, People’s Republic of China; [email protected], [email protected]AYZADA JumahaliSchool of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaKedieryemu KamiliSchool of Physical Science and Technology, Xinjiang University, Urumqi, 830017, People’s Republic of ChinaTing WuSchool of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of ChinaR. KarimovUlugh Beg Astronomical Institute, Uzbekistan Academy of Sciences, Astronomicheskaya 33, Tashkent, 100052, UzbekistanSh. A. EhgamberdievNational University of Uzbekistan, Tashkent, 100052, Uzbekistan

The Astrophysical Journaljournal2026en

ABI

Annotatsiya

Abstract We report a significant nonperiodic amplitude modulation in the δ Scuti star KIC 8712760. In this study, we conduct a long-term, multimission analysis of KIC 8712760, using uniformly processed light curves from the Wide Angle Search for Planets (WASP), Kepler, and Transiting Exoplanet Survey Satellite (TESS) missions, all placed on a common Barycentric Julian Date timescale. The amplitude of the primary mode at f 1 = 16.331 day −1 decreases over time. It changes from 5.2 ± 0.2 mmag observed in the WASP data to 0.929 ± 0.005 mmag in the Kepler data. However, in the TESS data, it shows an upward trend. Meanwhile, the amplitude of f 2 = 17.648 day −1 increases during the Kepler observation period. It later overtakes f 1 as the dominant frequency for part of the TESS baseline. The relative amplitude ranking further confirms this behavior. The observations may be related to two physical mechanisms that suggest a complex interaction in the pulsational dynamics of low-amplitude δ Scuti stars.

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Mavzular

Stellar, planetary, and galactic studies Astronomy and Astrophysical Research Astrophysics and Star Formation Studies

Identifikatorlar

DOI: 10.3847/1538-4357/ae41b6

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