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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Acceso en línea: | https://arxiv.org/abs/2410.13082 |
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| _version_ | 1866929547466768384 |
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| author | Maseizik, Dennis Eby, Joshua Seong, Hyeonseok Sigl, Günter |
| author_facet | Maseizik, Dennis Eby, Joshua Seong, Hyeonseok Sigl, Günter |
| contents | We estimate collapse rates of axion stars in our galaxy based on the axion minicluster mass function of the Milky Way dark matter halo. We consider axion-like particles with different temperature evolution of the axion mass, including the QCD axion with $m_a=50\,μ$eV. Combining estimates for the present-day axion star mass function from our previous work with the axion star accretion model predicted by self-similar growth, we can infer the expected number of bosenovae occurring within the Milky Way. Our estimates suggest that for an observation time of $t_\mathrm{obs}=1\,$yr, the majority of the up to $\sim 10^{13}$ bosenovae per galaxy occur in the densest miniclusters with initial overdensity parameter $Φ\lesssim 10^4$. We discuss the detectability of such recurring axion bursts within our galactic vicinity and find that, for models with derivative couplings including axion-fermion interactions, potential broadband axion DM experiments can probe a large range of ALP masses $m_a\lesssim 10^{-6}\,$eV and with moderate improvements even the QCD axion case. For axions with non-derivative-type interactions like the axion-photon coupling, our analysis suggests that optimistic predictions with order-one dark matter abundance of axion stars $f_\star \sim 1$ can be probed by dedicated burst searches. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_13082 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Detectability of accretion-induced bosenovae in the Milky Way Maseizik, Dennis Eby, Joshua Seong, Hyeonseok Sigl, Günter High Energy Physics - Phenomenology We estimate collapse rates of axion stars in our galaxy based on the axion minicluster mass function of the Milky Way dark matter halo. We consider axion-like particles with different temperature evolution of the axion mass, including the QCD axion with $m_a=50\,μ$eV. Combining estimates for the present-day axion star mass function from our previous work with the axion star accretion model predicted by self-similar growth, we can infer the expected number of bosenovae occurring within the Milky Way. Our estimates suggest that for an observation time of $t_\mathrm{obs}=1\,$yr, the majority of the up to $\sim 10^{13}$ bosenovae per galaxy occur in the densest miniclusters with initial overdensity parameter $Φ\lesssim 10^4$. We discuss the detectability of such recurring axion bursts within our galactic vicinity and find that, for models with derivative couplings including axion-fermion interactions, potential broadband axion DM experiments can probe a large range of ALP masses $m_a\lesssim 10^{-6}\,$eV and with moderate improvements even the QCD axion case. For axions with non-derivative-type interactions like the axion-photon coupling, our analysis suggests that optimistic predictions with order-one dark matter abundance of axion stars $f_\star \sim 1$ can be probed by dedicated burst searches. |
| title | Detectability of accretion-induced bosenovae in the Milky Way |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2410.13082 |