首页|Pulsations of Three Rapidly Oscillating Ap Stars TIC 96315731,TIC 72392575,and TIC 318007796

Pulsations of Three Rapidly Oscillating Ap Stars TIC 96315731,TIC 72392575,and TIC 318007796

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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 of 135.9233 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 TIC 318007796,the rotational and pulsational frequencies are 0.2475021 day-1,192.73995 day-1,and 196.33065 day-1,respectively.Based on the oblique pulsator model,we calculate the rotation inclination(i)and magnetic obliquity angle(β)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 TIC 96315731,TIC 72392575,and TIC 318007796 correspond to distorted dipole mode,distorted quadrupole mode,and distorted dipole mode,respectively.

asteroseismologytechniques:photometricstars:oscillations(including pulsations)stars:chemically peculiar

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

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School of Physical Science and Technology,Xinjiang University,Urumqi 830046,China

Xinjiang Astronomical Observatory,National Astronomical Observatories,Chinese Academy of Sciences,Urumqi 830000,China

NASA Explorer ProgramNational Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)science research grants from the China Manned Space ProjectNatural Science Foundation of XinjiangNatural Science Foundation of Xinjiang

U2031204123730381216300512288102CMSCSST-2021-A102022D01D852022TSYCLJ0006

2024

10.1088/1674-4527/ad621d

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2024.24(8)