Black hole accretion disk diffuse neutrino background

Schilbach, T.; Caballero, Oscar; McLaughlin, G. C.

doi:10.1103/physrevd.100.043008

Cited by 10 publications

(5 citation statements)

References 97 publications

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“…However, cosmological merger rate are far lower than the event rate of collapsar. Hence, the diffuse flux from NDAFs produced in mergers is at least two orders of magnitude smaller than that from NDAFs produced in collapsars (Schilbach et al 2019).…”

Section: Conclusion and Discussionmentioning

confidence: 85%

“…They found that the predicted background neutrino flux might be detected by Totally Immersible Tank Assaying Nucleon Decay (TITAND) for the optimistic cases with high mass accretion rate. Schilbach et al (2019) used updated models to study the CMNB from accretion disks formed during massive collapsars and compact object mergers. They adopted some typical mass accretion rates to calculate the neutrino emission of disks and found that DNNB is comparable (larger for high mass accretion rates) to DSNB.…”

Section: Introductionmentioning

confidence: 99%

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Neutrino-dominated accretion flows as the central engine of gamma-ray bursts

Liu

Zhang

2017

New Astronomy Reviews

108

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Neutrino-dominated accretion flows (NDAFs) around rotating stellar-mass black holes (BHs) are plausible candidates for the central engines of gamma-ray bursts (GRBs). NDAFs are hyperaccretion disks with accretion rates in the range of around 0.001-10 M ⊙ s −1 , which have high density and temperature and therefore are extremely optically thick and geometrically slim or even thick. We review the theoretical progresses in studying the properties of NDAFs as well as their applications to the GRB phenomenology. The topics include: the steady radial and vertical structure of NDAFs and the implications for calculating neutrino luminosity and annihilation luminosity, jet power due to neutrino-antineutrino annihilation and Blandford-Znajek mechanism and their dependences on parameters such as BH mass, spin, and accretion rate, time evolution of NDAFs, effect of magnetic fields, applications of NDAF theories to the GRB phenomenology such as lightcurve variability, extended emission, X-ray flares, kilonovae, etc., as well as probing NDAFs using multi-messenger signals such as MeV neutrinos and gravitational waves.

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Section: Conclusion and Discussionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Neutrino-dominated accretion flows as the central engine of gamma-ray bursts

Liu

Zhang

2017

New Astronomy Reviews

108

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show abstract

“…However, cosmological merger rates are far lower than the event rate of collapsars. Hence, the diffuse flux from NDAFs produced in mergers is at least 2 orders of magnitude smaller than that from NDAFs produced in collapsars (Schilbach et al 2019).…”

Section: Conclusion and Discussionmentioning

confidence: 86%

“…They found that the predicted background neutrino flux might be detected by Totally Immersible Tank Assaying Nucleon Decay for the optimistic cases with a high mass accretion rate. Schilbach et al (2019) used updated models to study the CMNB from accretion disks formed during massive collapsars and compact object mergers. They adopted some typical mass accretion rates to calculate the neutrino emission of disks and found that the DNNB is comparable (larger for high mass accretion rates) to the DSNB.…”

Section: Introductionmentioning

confidence: 99%

Contribution of Neutrino-dominated Accretion Flows to the Cosmic MeV Neutrino Background

Wei,

Liu,

Song

2024

ApJ

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Neutrino-dominated accretion flows (NDAFs) are one of the important MeV neutrino sources and significantly contribute to the cosmic diffuse neutrino background. In this paper, we investigate the spectrum of the diffuse NDAF neutrino background (DNNB) by fully considering the effects of the progenitor properties and initial explosion energies based on core-collapse supernova (CCSN) simulations, and estimate the detectable event rate by the Super-Kamiokande detector. We find that the predicted background neutrino flux is mainly determined by the typical CCSN initial explosion energy and progenitor metallicity. For the optimistic cases, in which the typical initial explosion energy is low, the diffuse flux of the DNNB is comparable to the diffuse supernova neutrino background, which might be detected by upcoming larger neutrino detectors, such as Hyper-Kamiokande, the Jiangmen Underground Neutrino Observatory, and the Deep Underground Neutrino Experiment. Moreover, the strong outflows from NDAFs could dramatically decrease their contribution to the neutrino background.

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“…In addition, they produce electromagnetic signals in the form of a gamma-ray burst [6] and the kilonova [36]. Neutron star mergers produce neutrinos as well, but since the number of neutrinos per event is less than for a supernova, and the merger rate is much less than the supernova rate, the expected number of detections of merger-originated neutrinos is, even with a network of gravitational wave detectors and a megaton neutrino detector operating in tandem, a few per century [37][38][39].…”

Section: Jcap01(2022)006mentioning

confidence: 99%

Light scalars in neutron star mergers

Dev¹,

Fortin²,

Harris³

et al. 2022

J. Cosmol. Astropart. Phys.

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Due to their unique set of multimessenger signals, neutron star mergers have emerged as a novel environment for studies of new physics beyond the Standard Model (SM). As a case study, we consider the simplest extension of the SM scalar sector involving a light CP-even scalar singlet S mixing with the SM Higgs boson. These S particles can be produced abundantly in neutron star mergers via the nucleon bremsstrahlung process. We show that the S particles may either be trapped in or stream freely out of the merger remnant, depending on the S mass, its mixing with the SM Higgs boson, and the temperature and baryon density in the merger. In the free-streaming region, the scalar S will provide an extra channel to cool down the merger remnant, with cooling timescales as small as 𝒪(ms). On the other hand, in the trapped region, the Bose gas of S particles could contribute a larger thermal conductivity than the trapped neutrinos in some parts of the parameter space, thus leading to faster thermal equilibration than expected. Therefore, future observations of the early postmerger phase of a neutron star merger could effectively probe a unique range of the S parameter space, largely complementary to the existing and future laboratory and supernova limits. In view of these results, we hope the merger simulation community will be motivated to implement the effects of light CP-even scalars into their simulations in both the free-streaming and trapped regimes.

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Black hole accretion disk diffuse neutrino background

Cited by 10 publications

References 97 publications

Neutrino-dominated accretion flows as the central engine of gamma-ray bursts

Neutrino-dominated accretion flows as the central engine of gamma-ray bursts

Contribution of Neutrino-dominated Accretion Flows to the Cosmic MeV Neutrino Background

Light scalars in neutron star mergers

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