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

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【作者】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；

【Author】 Wei-Yang Wang;Chen Zhang;Enping Zhou;Xiaohui Liu;Jiarui Niu;Zixuan Zhou;He Gao;Jifeng Liu;Renxin Xu;Bing Zhang;School of Astronomy and Space Science, University of Chinese Academy of Sciences;State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University;The HKUST Jockey Club Institute for Advanced Study, The Hong Kong University of Science and Technology;School of Physics, Huazhong University of Science and Technology;National Astronomical Observatories, Chinese Academy of Sciences;School of Mathematics and Physics, University of Science and Technology;Department of Astronomy, Beijing Normal University;New Cornerstone Science Laboratory, National Astronomical Observatories, Chinese Academy of Sciences;Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University;Nevada Center for Astrophysics, University of Nevada;Department of Physics and Astronomy, University of Nevada;

【机构】 School of Astronomy and Space Science, University of Chinese Academy of Sciences； State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University； The HKUST Jockey Club Institute for Advanced Study, The Hong Kong University of Science and Technology； School of Physics, Huazhong University of Science and Technology； National Astronomical Observatories, Chinese Academy of Sciences； School of Mathematics and Physics, University of Science and Technology； Department of Astronomy, Beijing Normal University； New Cornerstone Science Laboratory, National Astronomical Observatories, Chinese Academy of Sciences； Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University； Nevada Center for Astrophysics, University of Nevada； Department of Physics and Astronomy, University of Nevada；

【摘要】 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～10⁴⁶erg by existing toroidal fields,sustaining 10⁶bursts 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.更多还原

【Abstract】 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～10⁴⁶erg by existing toroidal fields,sustaining 10⁶bursts 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.更多还原

【关键词】 stars: magnetars； stars: neutron； radiation mechanisms: non-thermal；
【Key words】 stars: magnetars； stars: neutron； radiation mechanisms: non-thermal；

【基金】 supported by the National SKA Program of China (No. 2020SKA0120100);the Strategic Priority Research Program of the CAS (No. XDB0550300);support from the National Natural Science Foundation of China (NSFC, Grant Nos. 11988101 and 11933004);from the New Cornerstone Science Foundation through the New Cornerstone Investigator Program and the XPLORER PRIZE

【文献出处】 Research in Astronomy and Astrophysics ,天文和天体物理学研究(英文) , 编辑部邮箱 ,2024年10期

【分类号】P144

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