Investigating the Circumnuclear Medium of Tidal Disruption Events with Radio Observations
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866911492877582336 |
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| author | Zhou, Chang Lei, Wei-Hua Lei, Xiangli Ma, Po Fu, Shao-Yu Zhu, Zi-Pei |
| author_facet | Zhou, Chang Lei, Wei-Hua Lei, Xiangli Ma, Po Fu, Shao-Yu Zhu, Zi-Pei |
| contents | Tidal disruption events (TDEs) are unique tools for investigating quiescent supermassive black hole (SMBH), accretion physics, and circumnuclear medium (CNM) environments. The CNM density profile is of great astrophysical significance, since it provides key diagnostics for the accretion history of dormant SMBH. TDEs can launch outflows that produce radio emission when propagating into the CNM. The closure relation (CR), i.e., the relation between the temporal indices and the spectral indices, are therefore monitoring the CNM density profile. In this work, we first collect 53 TDEs with radio observations to date. We then obtain the predicted CR for arbitrary CNM and different dynamical phases of the outflow, and apply to the radio TDE sample. We constrain the CNM density profile for 26 radio TDEs with good data quality. The results are generally consistent with those estimated with equipatition method, suggesting that CR analysis is efficient in the study of CNM profile for a quiescent SMBH. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_06056 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Investigating the Circumnuclear Medium of Tidal Disruption Events with Radio Observations Zhou, Chang Lei, Wei-Hua Lei, Xiangli Ma, Po Fu, Shao-Yu Zhu, Zi-Pei High Energy Astrophysical Phenomena Tidal disruption events (TDEs) are unique tools for investigating quiescent supermassive black hole (SMBH), accretion physics, and circumnuclear medium (CNM) environments. The CNM density profile is of great astrophysical significance, since it provides key diagnostics for the accretion history of dormant SMBH. TDEs can launch outflows that produce radio emission when propagating into the CNM. The closure relation (CR), i.e., the relation between the temporal indices and the spectral indices, are therefore monitoring the CNM density profile. In this work, we first collect 53 TDEs with radio observations to date. We then obtain the predicted CR for arbitrary CNM and different dynamical phases of the outflow, and apply to the radio TDE sample. We constrain the CNM density profile for 26 radio TDEs with good data quality. The results are generally consistent with those estimated with equipatition method, suggesting that CR analysis is efficient in the study of CNM profile for a quiescent SMBH. |
| title | Investigating the Circumnuclear Medium of Tidal Disruption Events with Radio Observations |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2603.06056 |