An exploration of hadronic interactions in blazars using multi-messenger data

被引：2

作者：

Tchernin, C. ^{[1
]}

Aguilar, J. A. ^{[2
]}

Neronov, A. ^{[1
]}

Montaruli, T. ^{[2
]}

机构：

[1] Univ Geneva, Dept Astron, CH-1290 Versoix, Switzerland

[2] Univ Geneva, Dept Phys Nucl & Corpusculaire, CH-1211 Geneva 4, Switzerland

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2014年 / 742卷

关键词：

Active Galactic Nuclei; Blazars; Cosmic neutrinos; Hadrons; ACTIVE GALACTIC NUCLEI; LARGE-AREA TELESCOPE; ICECUBE;

D O I：

10.1016/j.nima.2013.10.065

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

High energy photon and neutrino emissions are expected from the interactions of high-energy protons with matter and/or radiation in the blazars environment. In these proceedings, we use the sensitivity of the IceCube neutrino detector estimated for different neutrino spectral indices (derived in Tchernin et al. (2013) [12]) to show that already in its 40-string configuration (IC-40), the sensitivity of the IceCube neutrino telescope is already at the level of constraining the parameter space of purely hadronic scenarios of blazar activity. As a result, using the full detector sensitivity, those constraints should be about a factor of 3 better than what discussed here. Assuming that the gamma-ray flux observed by Fermi can be explained with purely hadronic interactions, we estimate the expected neutrino flux from blazars based on the combination of the gamma-ray flux observed by Fermi, with the simultaneous IC-40 observations. We consider separately the cases where the proton-proton or proton-gamma interactions are dominant. In both cases, we set some constraints on the primary proton spectrum. In the case where pp interactions dominate, the tightest constraints are set for the source 3C 4543, for which the high energy part of the spectrum is constrained to be harder than E-2 and the cut-off energy larger than 10(18) eV. Alternatively, in the case where the dominant channel is the interaction of the high-energy protons with the soft radiation fields, the magnitude of the constraints depends on the radiation field energy distribution. For the source 3C 273, the most constrained source of our sample for the p gamma interaction, the cut-off energy is constrained to be E-cut greater than or similar to 10(18) eV for any spectral index and for different soft photon fields, including the radiation from the accretion disk (Big Blue Bump), the broad line region or the synchrotron radiation from the jet. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：191 / 194

页数：4

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