Multi-messenger Probes of Asteroid Mass Primordial Black Holes: Superradiance Spectroscopy, Hawking Radiation, and Microlensing
| Autor: | Dent, James B., Dutta, Bhaskar, Xu, Tao |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Superradiance provides a unique opportunity for investigating dark sectors as well as primordial black holes (PBHs), which themselves are candidates for dark matter (DM) over a wide mass range. Using axion-like particles (ALPs) as an example, we show that line signals emerging from a superradiated ALP cloud combined with Hawking radiation from PBHs in extragalactic and galactic halos, along with microlensing observations lead to complementary constraints on parameter space combinations including the ALP-photon coupling, ALP mass, PBH mass, and PBH DM fraction, $f_{\rm PBH}$. For the PBH asteroid mass range $\sim10^{16}-10^{22}~{\rm g}$, where PBHs can provide the totality of DM, we demonstrate that ongoing and upcoming observations such as SXI, JWST, and AMEGO-X will be sensitive to possible line and continuum signals, respectively, providing probes of previously inaccessible regions of $f_{\rm PBH}$ parameter space. Further complementarity from a stochastic gravitational-wave background emerging from the PBH formation mechanism is also considered. Comment: 6+3 pages, 6 figures |
| Databáze: | arXiv |
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