Pulsations of Three Rapidly Oscillating Ap Stars TIC 96315731,TIC72392575,and TIC 318007796  

作　　者：Hai-Jian Zhong Dong-Xiang Shen Chun-Hua Zhu He-Lei Liu Su-Fen Guo Guo-Liang Lü 

机构地区：[1]School of Physical Science and Technology,Xinjiang University,Urumqi 830046,China [2]Xinjiang Astronomical Observatory,National Astronomical Observatories,Chinese Academy of Sciences,Urumqi 830000,China

出　　处：《Research in Astronomy and Astrophysics》2024年第8期157-168,共12页天文和天体物理学研究（英文版）

基　　金：Funding for the TESS mission is provided by the NASA Explorer Program;support of the National Natural Science Foundation of China(NSFC,grant Nos.U2031204,12373038,12163005,and 12288102);the science research grants from the China Manned Space Project with No.CMSCSST-2021-A10;the Natural Science Foundation of Xinjiang Nos.2022D01D85 and 2022TSYCLJ0006。

摘　　要：We analyze the frequencies of three known roAp stars,TIC 96315731,TIC 72392575,and TIC 318007796,using the light curves from the Transiting Exoplanet Survey Satellite.For TIC 96315731,the rotational and pulsational frequencies are 0.1498360 day^(-1)and 165.2609 day^(-1),respectively.In the case of TIC 72392575,the rotational frequency is 0.25551 day^(-1).We detect a quintuplet of pulsation frequencies with a center frequency of135.9233 day^(-1),along with two signals within the second pair of rotational sidelobes of the quintuplet separated by the rotation frequency.These two signals may correspond to the frequencies of a dipole mode.In TIC318007796,the rotational and pulsational frequencies are 0.2475021 day^(-1),192.73995 day^(-1),and196.33065 day^(-1),respectively.Based on the oblique pulsator model,we calculate the rotation inclination(i)and magnetic obliquity angle(b)for the stars,which provide the geometry of the pulsation modes.Combining the phases of the frequency quintuplets,the pulsation amplitude and phase modulation curves,and the results of spherical harmonic decomposition,we conclude that the pulsation modes of frequency quintuplets in TIC96315731,TIC 72392575,and TIC 318007796 correspond to distorted dipole mode,distorted quadrupole mode,and distorted dipole mode,respectively.

关 键 词：asteroseismology-techniques photometric-stars oscillations(including pulsations)-stars chemically peculiar 

分 类 号：P152[天文地球—天文学]