High-energy Neutrino Flares from X-Ray Bright and Dark Tidal Disruption Events
Abstract
X-ray and γ-ray observations by the Swift satellite revealed that a fraction of tidal disruption events (TDEs) have relativistic jets. Jetted TDEs have been considered to be 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 non-detection would give us an upper limit on the baryon loading of the jet luminosity contained in cosmic-rays ξ cr ≲ 20-50 for Sw J1644+57. We show that X-ray bright TDEs make a sub-dominant (≲5%-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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 2017
- DOI:
- 10.3847/1538-4357/aa6344
- arXiv:
- arXiv:1612.00918
- Bibcode:
- 2017ApJ...838....3S
- Keywords:
-
- astroparticle physics;
- black hole physics;
- neutrinos;
- X-rays: bursts;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- v3: 9 pages, 7 figures, accepted in ApJ