Black hole spin influence on accretion disk neutrino detection

Abstract

Neutrinos are copiously emitted from black hole accretion disks playing a fundamental role in their evolution, as well as in the production of gamma ray bursts and r-process nucleosynthesis. The black hole generates a strong gravitational field able to change the properties of the emerging neutrinos. We study the influence of the black hole spin on the structure of the neutrino surfaces, neutrino luminosities, average neutrino energies, and event counts at SuperK. We consider several disk models and provide estimates that cover different black hole efficiency scenarios. We discuss the influence of the detector's inclination with respect to the axis of the torus on neutrino properties. We find that tori around spinning black holes have larger luminosities, energies and rates compared to tori around static black holes, and that the inclination of the observer causes a reduction in the luminosities and detection rates but an increase in the average energies.PACS numbers: 26.50.+x, 26.30.Jk, 95.55Vj, 97.80.Gm, 97.10.Gz, 95.30.Sf

Erratum: “A Search for Electron Antineutrinos Associated with Gravitational-wave Events GW150914 and GW151226 Using KamLAND” (2016, ApJL, 829, L34)

“…The temperature is given by = á ñ T E 3.15. We choose = E 12.7 MeV from Caballero et al (2016); the small change in average energies between accretion disk models had a negligible impact on the result.…”

“…There is a large uncertainty in the distance for all of GW150914, GW151226, and LVT151012, so the total energy upper limit is here displayed as a function of the true distance to the source, D GW . The electron anti-neutrino total energy upper limits without oscillation for GW150914, GW151226, and LVT151012 are thus given by The neutrino event rate scales as a function of the disk's mass accretion rate For current detector masses (for example, Super-Kamiokande), the number is ∼10,000 events at 10 kpc, so accounting for the r 1 2 scaling with distance, Super-Kamiokande may see one event from a black hole merger at 1 Mpc (Caballero et al 2016).…”

“…Unfortunately, our results do not constrain any viable accretion disk model. Caballero et al (2016) predicts approximately 500 events per kiloton at 10 kpc for accretion rates on the order of…”

Search for Neutrinos in Super-Kamiokande Associated with Gravitational Wave Events

“…In general, there is no theory of neutrino generation associated with a BH-BH merger. However, some possibilities of high energy neutrino emission have been discussed; for example, relativistic jets when an accretion disk is formed around the source [43,44], or the synthesis of heavy elements with the accretion disk [45,46]. A search for neutrinos from BH-BH mergers gives the opportunity to obtain a more complete picture of emission processes.…”

Multimessenger time delays from lensed gravitational waves

“…A merger between a NS and a black hole (BH) has the necessary matter component, although without the formation of a long-lived HMNS the neutrino luminosity may be much lower [19]. A BH-BH merger could produce particle emission if there is an accretion disc close enough to be strongly affected by the merger [20].…”