δείτε την πρωτότυπη σελίδα τεκμηρίου στον ιστότοπο του αποθετηρίου του φορέα για περισσότερες πληροφορίες και για να δείτε όλα τα ψηφιακά αρχεία του τεκμηρίου*
Multi-epoch Modeling of TXS 0506+056 and Implications for Long-term
High-energy Neutrino Emission
Petropoulou, Maria
Murase, Kohta
Santander, Marcos
Buson,
Sara
Tohuvavohu, Aaron
Kawamuro, Taiki
Vasilopoulos,
Georgios
Negoro, Hiroshi
Ueda, Yoshihiro
Siegel, Michael H.
and Keivani, Azadeh
Kawai, Nobuyuki
Mastichiadis, Apostolos and
Dimitrakoudis, Stavros
The IceCube report of a 3.5s excess of 13.+/-.5 neutrino events in the
direction of the blazar TXS.0506+056 in 2014-2015 and the 2017 detection
of a high-energy neutrino event, IceCube-170922A, during a gamma-ray
flare from the same blazar, have revived the interest in scenarios for
neutrino production in blazars. We perform comprehensive analyses on the
long-term electromagnetic emission of TXS.0506+056 using optical, X-ray,
and gamma-ray data from the All-Sky Automated Survey for Supernovae, the
Neil Gehrels Swift Observatory, Monitor of All-sky X-ray Image, and the
Fermi Large Area Telescope. We also perform numerical modeling of the
spectral energy distributions (SEDs) in four epochs prior to 2017 with
contemporaneous gamma-ray and lower-energy (optical and/or X-ray) data.
We find that the multi-epoch SEDs are consistent with a hybrid leptonic
scenario, where the gamma-rays are produced in the blazar zone via
external inverse Compton scattering of accelerated electrons, and
high-energy neutrinos are produced via the photomeson production process
of co-accelerated protons. The multi-epoch SEDs can be satisfactorily
explained with the same jet parameters and variable external photon
density and electron luminosity. Using the maximal neutrino flux derived
for each epoch, we put an upper limit of 0.4-2 on the muon neutrino
number in 10 years of IceCube observations. Our results are consistent
with the IceCube-170922A detection, which can be explained as an upper
fluctuation from the average neutrino rate expected from the source, but
in strong tension with the 2014-2015 neutrino flare.
(EN)
*Η εύρυθμη και αδιάλειπτη λειτουργία των διαδικτυακών διευθύνσεων των συλλογών (ψηφιακό αρχείο, καρτέλα τεκμηρίου στο αποθετήριο) είναι αποκλειστική ευθύνη των αντίστοιχων Φορέων περιεχομένου.
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