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On the Energy Budget of Starquake-induced Repeating Fast Radio Bursts

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With a growing sample of fast radio bursts(FRBs),we investigate the energy budget of different power sources within the framework of magnetar starquake triggering mechanism.During a starquake,the energy can be released in any form through strain,magnetic,rotational,and gravitational energies.The strain energy can be converted from three other kinds of energy during starquakes.The following findings are revealed:(1)The crust can store free magnetic energy of ∼1046 erg by existing toroidal fields,sustaining 106 bursts with frequent starquakes occurring due to crustal instability.(2)The strain energy develops as a rigid object spins down,which can be released during a global starquake accompanied by a glitch.However,it takes a long time to accumulate enough strain energy via spindown.(3)The rotational energy of a magnetar with P(≤)0.1 s can match the energy and luminosity budget of FRBs.(4)The budget of the total gravitational energy is high,but the mechanism and efficiency of converting this energy to radiation deserve further exploration.

starsmagnetars-starsneutron-radiation mechanismsnon-thermal

王维扬、张晨、周恩平、刘小辉、牛佳瑞、周子轩、高鹤、刘继峰、徐仁新、张冰

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School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China

State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China

The HKUST Jockey Club Institute for Advanced Study,The Hong Kong University of Science and Technology,Hong Kong,China

School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China

National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

School of Mathematics and Physics,University of Science and Technology,Beijing 100083,China

Department of Astronomy,Beijing Normal University,Beijing 100875,China

New Cornerstone Science Laboratory,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

Institute for Frontiers in Astronomy and Astrophysics,Beijing Normal University,Beijing 102206,China

Nevada Center for Astrophysics,University of Nevada,Las Vegas,NV 89154,USA

Department of Physics and Astronomy,University of Nevada,Las Vegas,NV 89154,USA

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National SKA Program of ChinaStrategic Priority Research Program of the CASNational Natural Science Foundation of China(NSFC)National Natural Science Foundation of China(NSFC)New Cornerstone Science Foundation through the New Cornerstone Investigator Program and the XPLORER PRIZE

2020SKA0120100XDB05503001198810111933004

2024

10.1088/1674-4527/ad74db

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(10)