Gravitational microlensing by dressed primordial black holes
文献类型：期刊论文
| 作者 | Cai, Rong-Gen ; Chen, Tan1; Wang, Shao-Jiang; Yang, Xing-Yu
|
| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2023 |
| 期号 | 3页码:43 |
| ISSN号 | 1475-7516 |
| 关键词 | HALO CONSTRAINTS LIMITS RANGE |
| DOI | 10.1088/1475-7516/2023/03/043 |
| 英文摘要 | The accretion of dark matter around the primordial black holes (PBHs) could lead to the formation of surrounding minihalos, whose mass can be several orders of magnitude higher than the central PBH mass. The gravitational microlensing produced by such dressed PBHs could be quite different from that of the bare PBHs, which may significantly affect the constraints on the PBH abundance. In this paper, we study the gravitational microlensing produced by dressed PBHs in detail. We find that all the microlensing effects by dressed PBHs have asymptotic behavior depending on the minihalo size, which can be used to predict the microlensing effects by comparing the halo size with the Einstein radius. When the minihalo radius and the Einstein radius are comparable, the effect of the density distribution of the halo is significant to the microlensing. Applying the stellar microlensing by dressed PBHs to the data of the Optical Gravitational Lensing Experiment and Subaru/HSC Andromeda observations, we obtain the improved constraints on the PBH abundance. It shows that the existence of dark matter minihalos surrounding PBHs can strengthen the constraints on the PBH abundance from stellar microlensing by several orders, and can shift the constraints to the well-known asteroid mass window where PBHs can constitute all the dark matter. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27989]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | 1.[Cai, Rong-Gen 2.Chen, Tan 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 5.Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China 6.Korea Inst Adv Study, Seoul 02455, South Korea |
| 推荐引用方式 GB/T 7714 | Cai, Rong-Gen,Chen, Tan,Wang, Shao-Jiang,et al. Gravitational microlensing by dressed primordial black holes[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2023(3):43. |
| APA | Cai, Rong-Gen,Chen, Tan,Wang, Shao-Jiang,&Yang, Xing-Yu.(2023).Gravitational microlensing by dressed primordial black holes.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(3),43. |
| MLA | Cai, Rong-Gen,et al."Gravitational microlensing by dressed primordial black holes".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .3(2023):43. |
入库方式： OAI收割
来源：理论物理研究所
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