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arXiv · 1612.00918

High-Energy Neutrino Flares From X-Ray Bright and Dark Tidal Disruptions Events

Nicholas Senno·Kohta Murase·Peter Meszaros
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Abstract

X-ray and $\gamma$-ray observations by the Swift satellite revealed that a fraction of tidal disruption events (TDEs) have relativistic jets. Jetted TDEs have been considered as potential sources of very high-energy cosmic-rays and neutrinos. In this work, using semi-analytical methods, we calculate neutrino spectra of X-ray bright TDEs with powerful jets and dark TDEs with possible choked jets, respectively. We estimate their neutrino fluxes and find that the non-detection would give us an upper limit on the cosmic-ray loading factor, $\xi_{\rm cr}\lesssim20$, for Sw J1644+57. We show that X-ray bright TDEs make a sub-dominant ($\lesssim5-10$%) contribution to IceCube's diffuse neutrino flux, and study possible contributions of X-ray dark TDEs given that particles are accelerated in choked jets or disk-winds. We discuss future prospects for multi-messenger searches of the brightest TDEs.

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Nicholas Senno, Kohta Murase, Peter Meszaros. 2016-12-03. High-Energy Neutrino Flares From X-Ray Bright and Dark Tidal Disruptions Events. https://doi.org/10.3847/1538-4357%2Faa6344

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