A triplet of the only pulsation mode detected in the DAV star G132–12

作     者：Wen-Chao Su Jian-Ning Fu Jian-Xing Chen Lester Fox-Machado Shi-Jie Zhao Carmen Ayala-Loera Jiang-Tao Wang Yang Pan Wen-Chao Su;Jian-Ning Fu;Jian-Xing Chen;Lester Fox-Machado;Shi-Jie Zhao;Carmen Ayala-Loera;Jiang-Tao Wang;Yang Pan

作者机构：Department of AstronomyBeijing Normal UniversityBeijing 100012China Dipartimento di Fisica e AstronomiaAlma Mater Studiorum Universita’di Bolognavia Piero Gobetti 93/21-40129 BolognaItaly INAF-Osservatorio di Astrofisica e Scienze dello Spazio di BolognaVia Piero Gobetti 93/31-40129 BolognaItaly Instituto de AstronomiaUniversidad Nacional Autonoma de MexicoApartado Postal 87722800 EnsenadaBaja CaliforniaMexico Institute of Astronomy&AstrophysicsAcademia SinicaTaipeiChina 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2021年第21卷第6期

页      面：276-280页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 070401[理学-天体物理] 0704[理学-天文学] 0825[工学-航空宇航科学与技术] 

基　　金：support from the National Natural Science Foundation of China(NSFC,Grant Nos.11833002,12090040 and 12090042) financial support of the UNAM(Grant PAPIIT IN100918)。 

主　　题：white dwarfs oscillations photometric 

摘      要：Hydrogen atmosphere pulsating white dwarfs,also known as DAV stars,are the most abundant type of pulsating white dwarfs.High-temperature DAV stars in general exhibit a small number of pulsation modes and stable frequencies.G132-12 is one of the pulsating hydrogen atmosphere white dwarf stars which lies close to the blue edge of the instability strip.Previous researches reported that G132-12 might have only one pulsation mode with the period of 212.69 s.To study the pulsation properties of G132-12 in detail,we carried out a bi-site observation campaign in October 2019.Time series photometric data were collected during around 154 h in total.A Fourier analysis reveals three frequencies which are identified as the triplet of an l=1 g-mode pulsation with the period of 212.499 s.The rotational period is derived as Prot=35.0±6.7 h and the inclination of the rotational axis to the line of sight is 70°.G132-12 could be an ideal target for measuring the cooling scale of this white dwarf star with only one excited pulsation mode detected.