期刊論文
| 學年 | 111 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2022-08-18 |
| 作品名稱 | Self-interacting dark scalar spikes around black holes via relativistic Bondi accretion |
| 作品名稱（其他語言） | |
| 著者 | Wei-Xiang Feng; Alessandro Parisi; Chian-Shu Chen; Feng-Li Lin |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Journal of Cosmology and Astroparticle Physics 2022 |
| 摘要 | We consider the spike mass density profile in a dark halo by self-consistently solving the relativistic Bondi accretion of dark matter onto a non-spining black hole of mass M. We assume that the dominant component of the dark matter in the halo is a Standard model gauge-singlet scalar. Its mass m ≃ 10-5 eV and quartic self-coupling λ ≲ 1019 are constrained to be compatible with the properties of galactic dark halos. In the hydrodynamic limit, we find that the accretion rate is bounded from below, Mmin = 96πG2M2m4/λħ3. Therefore, for M = 106 M⊙ we have Mmin ≃ 1.41 × 10-9 M⊙ yr-1, which is subdominant compared to the Eddington accretion of baryons. The spike density profile ρ0(r) within the self-gravitating regime cannot be fitted well by a single-power law but a double-power one. Despite that, we can fit ρ0(r) piecewise and find that ρ0(r) ∝ r-1.20 near the sound horizon, ρ0(r) ∝ r-1.00 towards the Bondi radius and ρ0(r) ∝ r-1.08 for the region in between. This contrasts with more cuspy ρ0(r) ∝ r-1.75 for dark matter with Coulomb-like self-interaction. |
| 關鍵字 | accretion; astrophysical fluid dynamics; dark matter theory; massive black holes |
| 語言 | en |
| ISSN | 1475-7516 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | 國外 |
| 通訊作者 | Chian-Shu Chen and Feng-Li Lin |
| 審稿制度 | 是 |
| 國別 | GBR |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/123352 ) |