On the direct correlation between gamma-rays and PeV neutrinos from blazars - INSPIRE

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On the direct correlation between gamma-rays and PeV neutrinos from blazars

Shan Gao
(
- DESY, Zeuthen
)
,
Martin Pohl
(
- DESY, Zeuthen and
- Potsdam U.
)
,
Walter Winter
(
- DESY, Zeuthen
)

Oct 17, 2016

23 pages

Published in:

Astrophys.J. 843 (2017) 2, 109

Published: Jul 11, 2017

e-Print:

1610.05306 [astro-ph.HE]

DOI:

10.3847/1538-4357/aa7754

View in:

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Abstract: (IOP)

We study the frequently used assumption in multi-messenger astrophysics that the gamma-ray and neutrino fluxes are directly connected because they are assumed to be produced by the same photohadronic production chain. An interesting candidate source for this test is the flat-spectrum radio quasar PKS B1424-418, which recently called attention to a potential correlation between an IceCube PeV neutrino event and its burst phase. We simulate both the multi-waveband photon and the neutrino emission from this source using a self-consistent radiation model. We demonstrate that a simple hadronic model cannot adequately describe the spectral energy distribution for this source, but a lepto-hadronic model with a subdominant hadronic component can reproduce the multi-waveband photon spectrum observed during various activity phases of the blazar. As a conclusion, up to about 0.3 neutrino events may coincide with the burst, which implies that the leptonic contribution dominates in the relevant energy band. We also demonstrate that the time-wise correlation between the neutrino event and burst phase is weak.

Note:

23 pages, 6 figures, 4 tables, accepted by ApJ

galaxies: jets
gamma rays: general
neutrinos
model: hadronic
photon: spectrum
correlation
burst
gamma ray
blazar
neutrino: UHE

References(37)

Figures(6)

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(
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)
,
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)
,
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