Extragalactic gamma-ray background radiation from dark matter annihilation
文献类型：期刊论文
| 作者 | Zavala, Jesus1,2; Springel, Volker1; Boylan-Kolchin, Michael1 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2010-06-11 |
| 卷号 | 405期号:1页码:593-612 |
| 关键词 | methods: numerical dark matter |
| 英文摘要 | If dark matter is composed of neutralinos, one of the most exciting prospects for its detection lies in observations of the gamma-ray radiation created in pair annihilations between neutralinos, a process that may contribute significantly to the extragalactic gamma-ray background (EGB) radiation. We here use the high-resolution Millennium-II simulation of cosmic structure formation to produce the first full sky maps of the expected radiation coming from extragalactic dark matter structures. Our map-making procedure takes into account the total gamma-ray luminosity from all haloes and their subhaloes, and includes corrections for unresolved components of the emission as well as an extrapolation to the damping scale limit of neutralinos. Our analysis also includes a proper normalization of the signal according to a specific supersymmetric model based on minimal supergravity. The new simulated maps allow a study of the angular power spectrum of the gamma-ray background from dark matter annihilation, which has distinctive features associated with the nature of the annihilation process and may be detectable in forthcoming observations by the recently launched Fermi satellite. Our results are in broad agreement with analytic models for the gamma-ray background, but they also include higher order correlations not readily accessible in analytic calculations and, in addition, provide detailed spectral information for each pixel. In particular, we find that difference maps at different energies can reveal cosmic large-scale structure at low and intermediate redshifts. If the intrinsic emission spectrum is characterized by an emission peak, cosmological tomography with gamma-ray annihilation radiation is in principle possible. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | PHASE-SPACE STRUCTURE ; POWER SPECTRUM ; HALO CONCENTRATIONS ; GALACTIC HALO ; SUPERSYMMETRY ; SIMULATIONS ; NEUTRALINO ; SEARCH ; MODEL ; DEPENDENCE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000278313200071 |
| 源URL | [http://119.78.226.72/handle/331011/26304]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Max Planck Inst Astrophys, D-85740 Garching, Germany 2.Shanghai Astron Observ, MPA SHAO Joint Ctr Astrophys Cosmol, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zavala, Jesus,Springel, Volker,Boylan-Kolchin, Michael. Extragalactic gamma-ray background radiation from dark matter annihilation[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,405(1):593-612. |
| APA | Zavala, Jesus,Springel, Volker,&Boylan-Kolchin, Michael.(2010).Extragalactic gamma-ray background radiation from dark matter annihilation.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,405(1),593-612. |
| MLA | Zavala, Jesus,et al."Extragalactic gamma-ray background radiation from dark matter annihilation".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 405.1(2010):593-612. |
入库方式： OAI收割
来源：上海天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。