Galactic discrete sources of high energy neutrinos

Bednarek, W.; Burgio, G. F.; Montaruli, T.

doi:10.1016/j.newar.2004.11.001

Cited by 60 publications

(53 citation statements)

References 89 publications

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“…Active galactic nuclei (AGN) and the associated jets, together with stellar objects such as pulsars, magnetars, supernovae and γ-ray bursters, are identified as potential sources of high-energy neutrinos (Bednarek et al 2005;Waxman 2007;Becker 2008). AGN are the most luminous persistent X-ray sources known.…”

Section: Introductionmentioning

confidence: 99%

High-energy neutrino fluxes from AGN populations inferred from X-ray surveys

Jacobsen

et al. 2015

Mon. Not. R. Astron. Soc.

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High-energy neutrinos and photons are complementary messengers, probing violent astrophysical processes and structural evolution of the Universe. X-ray and neutrino observations jointly constrain conditions in active galactic nuclei (AGN) jets: their baryonic and leptonic contents, and particle production efficiency. Testing two standard neutrino production models for local source Cen A (Koers & Tinyakov 2008; Becker & Biermann 2009), we calculate the high-energy neutrino spectra of single AGN sources and derive the flux of high-energy neutrinos expected for the current epoch. Assuming that accretion determines both X-rays and particle creation, our parametric scaling relations predict neutrino yield in various AGN classes. We derive redshift-dependent number densities of each class, from Chandra and Swift/BAT X-ray luminosity functions (Silverman et al. 2008;Ajello et al. 2009). We integrate the neutrino spectrum expected from the cumulative history of AGN (correcting for cosmological and source effects, e.g. jet orientation and beaming). Both emission scenarios yield neutrino fluxes well above limits set by IceCube (by " 4-10 6ˆa t 1 PeV, depending on the assumed jet models for neutrino production). This implies that: (i) Cen A might not be a typical neutrino source as commonly assumed; (ii) both neutrino production models overestimate the efficiency; (iii) neutrino luminosity scales with accretion power differently among AGN classes and hence does not follow X-ray luminosity universally; (iv) some AGN are neutrino-quiet (e.g. below a power threshold for neutrino production); (v) neutrino and X-ray emission have different duty cycles (e.g. jets alternate between baryonic and leptonic flows); or (vi) some combination of the above.

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Section: Introductionmentioning

confidence: 99%

High-energy neutrino fluxes from AGN populations inferred from X-ray surveys

Jacobsen

et al. 2015

Mon. Not. R. Astron. Soc.

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“…From observation with photons such shock waves are known to exist in various objects in our own Galaxy as well as up to cosmological distances. Various models for neutrino production exist [28][29][30]. Promising neutrino point source candidates in our own Galaxy are Supernovae Remnants and Micro Quasars whereas the vicinity of the super-massive black holes in Active Galactic Nuclei and Gamma Ray Bursts are prominent extragalactic candidates.…”

Section: Search For Neutrino Point Sourcesmentioning

confidence: 99%

IceCube and ANTARES

Brünner

2013

EPJ Web of Conferences

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Abstract. IceCube and ANTARES are neutrino detectors sensitive to energies from 20 GeV up to PeV. Both detectors have been completed and take data. Several years of data have been already analysed including periods with the partly assembled detectors. The primary goal of these two neutrino telescopes is the observation of astrophysical sources of neutrinos. Results from searches for such neutrinos with different strategies will be presented as well as measurements of atmospheric neutrinos which are an irreducible background for such searches, but they are an interesting study object by themselves.

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“…As mentioned in [1], the maximum energy at which a particle can be accelerated, can be derived from the simple argument that the Larmor radius of the particle should be smaller than the size of the acceleration region [44] (7) where β is the velocity of the shock wave or the acceleration mechanism efficiency, and Z is the charge. Diffusive particle acceleration through shocks may occur in many candidate sites.…”

Section: Proton Accelerationmentioning

confidence: 99%

“…When a NS belongs to a binary system, the accelerated hadrons can collide with convenient targets in the companion star. X-ray binaries are thus potential high-energy neutrino sources (see [1] and references therein). The magnetosphere of X-ray binaries presents electrostatic gaps that can disrupt the accretion process around the NS and strongly accelerate protons.…”

Section: Introductionmentioning

confidence: 99%

Neutrino signals from galactic binaries

Christiansen¹

2007

Braz. J. Phys.

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We analyze the possible origin of high-energy neutrinos coming from galactic sources. A model is proposed for neutrino hadroproduction in binary systems. Our results show that neutrino observatories like IceCube can establish whether TeV neutrinos and gamma rays emitted by microquasars are the decay products of pions. Such pions can be produced where the jet collides with the stellar wind of the companion star giving rise to hadronic interactions. We improve previous predictions by considering energy dependent pion multiplicities, particularly significant at high energies, and the most recent values for the parameters of the system. We also discuss the gamma-ray flux associated with neutrino emission.

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Galactic discrete sources of high energy neutrinos

Cited by 60 publications

References 89 publications

High-energy neutrino fluxes from AGN populations inferred from X-ray surveys

High-energy neutrino fluxes from AGN populations inferred from X-ray surveys

IceCube and ANTARES

Neutrino signals from galactic binaries

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