Quantifying Departures from Equilibrium with the Spherical Jeans Equation
文献类型：期刊论文
| 作者 | Evslin, Jarah1,2; Del Popolo, Antonino3,4,5 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 841页码:14 |
| 关键词 | astrometry galaxies: kinematics and dynamics Local Group proper motions |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aa7205 |
| 英文摘要 | Proper motions of collisionless, pointlike objects in a spherically symmetric system-for example, stars in a galaxy-can be used to test whether that system is in equilibrium, with no assumptions regarding isotropy. In particular, the fourth-order spherical Jeans equation yields expressions for two observable quantities characterizing the departure from equilibrium, both of which can be expressed in terms of time derivatives of first and third moments of the velocities. As illustrations, we compute these quantities for tracer distributions drawn from an exact equilibrium configuration, and also from near-equilibrium configurations generated using the N-body code GALIC. |
| WOS关键词 | DWARF SPHEROIDAL GALAXY ; COLD DARK-MATTER ; DENSITY PROFILE ; FORNAX DWARF ; WIDE-FIELD ; MILKY-WAY ; SHAPE ; ANNIHILATION ; DEGENERACY ; PARAMETERS |
| 资助项目 | NSFC MianShang[11375201] ; Recruitment Program of High-end Foreign Experts ; CAS Key Research Program of Frontier Sciences[QYZDY-SSW-SLH006] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000402310800024 |
| 出版者 | IOP PUBLISHING LTD |
| 资助机构 | NSFC MianShang ; Recruitment Program of High-end Foreign Experts ; CAS Key Research Program of Frontier Sciences |
| 源URL | [http://119.78.100.186/handle/113462/24511]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Evslin, Jarah |
| 作者单位 | 1.Chinese Acad Sci, Inst Modern Phys, NanChangLu 509, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, YuQuanLu 19A, Beijing 100049, Peoples R China 3.Univ Catania, Dipartimento Fis & Astron, Viale Andrea Doria 6, I-95125 Catania, Italy 4.INFN, Sez Catania, Via S Sofia 64, I-95123 Catania, Italy 5.Univ Fed Rio Grande do Norte, Int Inst Phys, BR-59012970 Natal, RN, Brazil |
| 推荐引用方式 GB/T 7714 | Evslin, Jarah,Del Popolo, Antonino. Quantifying Departures from Equilibrium with the Spherical Jeans Equation[J]. ASTROPHYSICAL JOURNAL,2017,841:14. |
| APA | Evslin, Jarah,&Del Popolo, Antonino.(2017).Quantifying Departures from Equilibrium with the Spherical Jeans Equation.ASTROPHYSICAL JOURNAL,841,14. |
| MLA | Evslin, Jarah,et al."Quantifying Departures from Equilibrium with the Spherical Jeans Equation".ASTROPHYSICAL JOURNAL 841(2017):14. |
入库方式： OAI收割
来源：近代物理研究所
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