Glitches in four gamma-ray pulsars and inferences on the neutron star structure
文献类型：期刊论文
| 作者 | Gugercinoglu, E.1,6; Ge, M. Y.5; Yuan, J. P.3,4 ; Zhou, S. Q.2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 2022-02-01 |
| 卷号 | 511期号:1页码:425-439 |
| 关键词 | stars: neutron pulsars: general pulsars: individual: PSR J0835-4510 (Vela) pulsars: individual: PSR J1023-5746 pulsars: individual: PSR J2111+4606 pulsars: individual: PSR J2229+6114 |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stac026 |
| 通讯作者 | Gugercinoglu, E.(egugercinoglu@gmail.com) ; Ge, M. Y.(gemy@ihep.ac.cn) |
| 英文摘要 | We present timing solutions from the Fermi-LAT observations of gamma-ray pulsars PSR J0835 - 4510 (Vela), PSR J1023-5746, PSR J2111+4606, and PSR J2229+6114. Data ranges for each pulsar extend over a decade. From data analysis, we have identified a total of 20 glitches, 11 of which are new discoveries. Among them, 15 glitches are large ones with Delta nu/nu greater than or similar to 10(-6). PSR J1023-5746 is the most active pulsar with glitch activity parameter being A(g) = 14.5 x 10(-7) yr(-1) in the considered data span and should be a target for frequently glitching Vela-like pulsars in future observations. We have done fits within the framework of the vortex creep model for 16 glitches with Delta nu/nu greater than or similar to 10(-7). By theoretical analysis of these glitches, we are able to obtain important information on the structure of neutron star, including moments of inertia of the superfluid regions participated in glitches and coupling time-scales between various stellar components. The theoretical prediction for the time to the next glitch from the parameters of the previous one is found to be in qualitative agreement with the observed inter-glitch time-scales for the considered sample. Recoupling time-scales of the crustal superfluid are within the range of theoretical expectations and scale inversely with the spin-down rate of a pulsar. We also determined a braking index n = 2.63(30) for PSR J2229+6114 after glitch-induced contributions have been removed. |
| WOS关键词 | EQUATION-OF-STATE ; VORTEX CREEP ; SPIN-UP ; BRAKING INDEX ; RADIO PULSARS ; VELA PULSAR ; HIGH-ENERGY ; INTERNAL TEMPERATURE ; SUPERFLUID CORE ; MAGNETIC-FIELD |
| 资助项目 | Scientific and Technological Research Council of Turkey (TuBTAK)[117F330] ; National Natural Science Foundation of China[U1838201] ; National Natural Science Foundation of China[U1838202] ; National Natural Science Foundation of China[U1838104] ; National Natural Science Foundation of China[U1938103] ; National Natural Science Foundation of China[U1938109] ; National Natural Science Foundation of China[11873080] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000770033900025 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | Scientific and Technological Research Council of Turkey (TuBTAK) ; National Natural Science Foundation of China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4596]  |
| 专题 | 脉冲星研究团组 |
| 通讯作者 | Gugercinoglu, E.; Ge, M. Y. |
| 作者单位 | 1.Hekim Tahsin St 7, TR-34467 Istanbul, Turkey 2.Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China 3.Chinese Acad Sci, Ctr Astron Megasci, Beijing 100012, Peoples R China 4.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 5.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 6.Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey |
| 推荐引用方式 GB/T 7714 | Gugercinoglu, E.,Ge, M. Y.,Yuan, J. P.,et al. Glitches in four gamma-ray pulsars and inferences on the neutron star structure[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2022,511(1):425-439. |
| APA | Gugercinoglu, E.,Ge, M. Y.,Yuan, J. P.,&Zhou, S. Q..(2022).Glitches in four gamma-ray pulsars and inferences on the neutron star structure.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,511(1),425-439. |
| MLA | Gugercinoglu, E.,et al."Glitches in four gamma-ray pulsars and inferences on the neutron star structure".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 511.1(2022):425-439. |
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