Institutional Repository of Radio Astronomy Research Laboratory
| Small glitches: the role of strange nuggets? | |
Lai, Xiao-Yu1,2 ; Xu, Ren-Xin3,4
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| 2016-03-01 | |
| Source Publication | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| ISSN | 1674-4527 |
| Volume | 16Issue:3Pages:46 |
| Contribution Rank | 1 |
| Abstract | Pulsar glitches, i.e. the sudden spin-ups of pulsars. have been detected for most known pulsars. The mechanism giving rise to this kind of phenomenon is uncertain, although a large data set has been built. In the framework of the starquake model, based on Baym & Pines, the glitch sizes (the relative increases of spin-frequencies during glitches) Delta Omega/Omega depend on the released energies during glitches, with less released energies corresponding to smaller glitch sizes. On the other hand, as one of the dark matter candidates, our Galaxy might be filled with so called strange nuggets (SNs) which are relics from the early Universe. In this case collisions between pulsars and SNs are inevitable, and these collisions would lead to glitches when enough elastic energy has been accumulated during the spin-down process. The SN-triggered glitches could release less energy, because the accumulated elastic energy would be less than that in the scenario of glitches without SNs. Therefore, if a pulsar is hit frequently by SNs, it would tend to have more small glitches, whose values of Delta Omega/Omega are smaller than those in the standard starquake model (with larger amounts of released energy). Based on the assumption that in our Galaxy the distribution of SNs is similar to that of dark matter, as well as on the glitch data in the ATNF Pulsar Catalogue and Jodrell Bank glitch table, we find that in our Galaxy the incidences of small glitches exhibit tendencies consistent with the collision rates between pulsars and SNs. Further testing of this scenario is expected by detecting more small glitches (e.g.. by the Square Kilometre Array). |
| Keyword | Pulsars Glitches Quark-cluster Stars Strange Nuggets |
| Subtype | Article |
| DOI | 10.1088/1674-4527/16/3/046 |
| WOS Headings | Science & Technology ; Physical Sciences |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | SOLID QUARK STARS ; MASSIVE PARTICLES ; GALACTIC HALO ; ANTI-GLITCH ; DARK-MATTER ; PULSAR ; MODEL ; MAGNETAR ; LIMITS |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000371883400010 |
| Funding Organization | National Natural Science Foundation of China(11203018) ; West Light Foundation(XBBS-2014-23) ; Science Project of Universities in Xinjiang(XJEDU2012S02) ; Doctoral Science Foundation of Xinjiang University(BS120107) |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/929 |
| Collection | 射电天文研究室_脉冲星研究团组 其它 |
| Corresponding Author | Lai, Xiao-Yu |
| Affiliation | 1.Xinjiang Univ, Sch Phys, Urumqi 830046, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 3.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Lai, Xiao-Yu,Xu, Ren-Xin. Small glitches: the role of strange nuggets?[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(3):46. |
| APA | Lai, Xiao-Yu,&Xu, Ren-Xin.(2016).Small glitches: the role of strange nuggets?.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(3),46. |
| MLA | Lai, Xiao-Yu,et al."Small glitches: the role of strange nuggets?".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.3(2016):46. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| raa_16_3_010.pdf（178KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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