The Wandering Supermassive Black Hole Powering the off-nuclear TDE AT2024tvd
M. Guolo, A. Mummery, S. van Velzen, M. Nicholl, S. Gezari, Y. Yao, K. C. Chambers, T. de Boer, M. E. Huber, C.-C. Lin, T. B. Lowe, E. A. Magnier, G. Paek, R. Wainscoat

TL;DR
This study models the spectral energy distribution of the off-nuclear TDE AT2024tvd, revealing a wandering supermassive black hole with a high mass ratio, consistent with a tidally stripped galaxy nucleus, using relativistic accretion disk models.
Contribution
It introduces a physically consistent relativistic disk model to analyze TDE SEDs, inferring black hole properties and host galaxy characteristics with improved reliability.
Findings
Black hole mass approximately 10^6 solar masses.
No detectable host galaxy or star cluster down to specified mass limit.
Black hole-to-host mass ratio exceeds 3%, indicating a tidally stripped nucleus.
Abstract
We present an analysis of the spectral energy distribution (SED) of the off-nuclear tidal disruption event (TDE) AT2024tvd during its late-time plateau phase, combining X-ray spectra and UV/optical photometry. Using a fully relativistic, compact accretion disk model with self-consistent inner-disk Comptonization, we reproduce the observed SED without significant residuals. The inferred black hole mass , and the inferred disk parameters place AT2024tvd within known TDE-disk scaling relations (, , ). Our results show that: (i) there is no \textit{detected} star cluster or dwarf galaxy associated with the source, down to a mass limit of $\log_{10}(M_{\rm…
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Taxonomy
TopicsAstrophysical Phenomena and Observations · Galaxies: Formation, Evolution, Phenomena · Pulsars and Gravitational Waves Research
