High-energy neutrino emission from tidal disruption event outflow-cloud interactions
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913432618401792 |
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| author | Wu, Hanji Wang, Kai Wang, Wei |
| author_facet | Wu, Hanji Wang, Kai Wang, Wei |
| contents | Tidal disruption events (TDEs), characterized by their luminous transients and high-velocity outflows, have emerged as plausible sources of high-energy neutrinos contributing to the diffuse neutrino. In this study, we calculate the contribution of TDEs to the diffuse neutrino by employing the outflow-cloud model within the TDE framework. Our analysis indicates that the contribution of TDEs becomes negligible when the redshift $Z$ exceeds 2. Employing a set of fiducial values, which includes outflow energy $E_{\rm kin}=10^{51}$ erg, a proton spectrum cutoff energy $E_{\rm p,max}=100$ PeV, a volume TDE rate $\dot{N}=8 \times 10^{-7}\ \rm Mpc^{-3}\ year^{-1}$, covering fraction of clouds $C_V=0.1$, energy conversion efficiency in the shock $η=0.1$, and a proton spectrum index $Γ=-1.7$, we find that TDEs can account for approximately 80\% of the contribution at energies around 0.3 PeV. Additionally, TDEs still contribute around 18\% to the IceCube data below 0.1 PeV and the total contribution is $\sim 24^{+2}_{-15}\%$. In addition, we also discuss the potential influence of various parameter values on the results in detail. With the IceCube data, we impose constraints on the combination of the physical parameters, i.e., $C_{f}=\dot{N}E_{\rm kin}C_{\rm v}η$. Future observations or theoretical considerations would fix some physical parameters, which will help to constrain some individual parameters of TDEs. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_11410 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-energy neutrino emission from tidal disruption event outflow-cloud interactions Wu, Hanji Wang, Kai Wang, Wei High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics Tidal disruption events (TDEs), characterized by their luminous transients and high-velocity outflows, have emerged as plausible sources of high-energy neutrinos contributing to the diffuse neutrino. In this study, we calculate the contribution of TDEs to the diffuse neutrino by employing the outflow-cloud model within the TDE framework. Our analysis indicates that the contribution of TDEs becomes negligible when the redshift $Z$ exceeds 2. Employing a set of fiducial values, which includes outflow energy $E_{\rm kin}=10^{51}$ erg, a proton spectrum cutoff energy $E_{\rm p,max}=100$ PeV, a volume TDE rate $\dot{N}=8 \times 10^{-7}\ \rm Mpc^{-3}\ year^{-1}$, covering fraction of clouds $C_V=0.1$, energy conversion efficiency in the shock $η=0.1$, and a proton spectrum index $Γ=-1.7$, we find that TDEs can account for approximately 80\% of the contribution at energies around 0.3 PeV. Additionally, TDEs still contribute around 18\% to the IceCube data below 0.1 PeV and the total contribution is $\sim 24^{+2}_{-15}\%$. In addition, we also discuss the potential influence of various parameter values on the results in detail. With the IceCube data, we impose constraints on the combination of the physical parameters, i.e., $C_{f}=\dot{N}E_{\rm kin}C_{\rm v}η$. Future observations or theoretical considerations would fix some physical parameters, which will help to constrain some individual parameters of TDEs. |
| title | High-energy neutrino emission from tidal disruption event outflow-cloud interactions |
| topic | High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2407.11410 |