Results 21 to 30 of about 20,672 (255)
Assigning Degrees of Stochasticity to Blazar Light Curves in the Radio Band Using Complex Networks
Entropy, 2022 We focus on characterizing the high-energy emission mechanisms of blazars by analyzing the variability in the radio band of the light curves of more than a thousand sources.
Belén Acosta-Tripailao +3 more
doaj +1 more source
Universe, 2023 In this work, we study the parameter space of neutrino-emitting BL Lacs under the framework of the one-zone lepto-hadronic model. We show that constraints on the model come from various aspects of observations such as the variability timescale of blazar ...
Zhi-Peng Ma, Kai Wang
doaj +1 more source
Jetted Narrow-Line Seyfert 1 Galaxies & Co.: Where Do We Stand?
Universe, 2020 The discovery in 2008 of high-energy gamma-rays from Narrow-Line Seyfert 1 Galaxies (NLS1s) made it clear that there were active galactic nuclei (AGN) other than blazars and radio galaxies that can eject powerful relativistic jets.
Luigi Foschini
doaj +1 more source
Unifying MeV-blazars with GeV-blazars [PDF]
, 2002 We demonstrate that the spectral differences between Flat Spectrum Radio Quasars (FSRQ) with steep gamma-ray spectra (MeV-blazars) and FSRQ with flat gamma-ray spectra (GeV-blazars) can be explained by assuming that in the MeV-blazars, the production of gamma-rays is dominated by Comptonization of infrared radiation of hot dust, whereas in the GeV ...
Blazejowski, M. +3 more
openaire +3 more sources
AIP Conference Proceedings, 2001 Invited talk at "International Symposium on High Energy Gamma-Ray Astronomy", Heidelberg, Eds. F. Aharonian and H.
Sikora, M., Madejski, G.
openaire +3 more sources
Polarimetric Properties of Blazars Caught by the WEBT
Galaxies, 2021 Active galactic nuclei come in many varieties. A minority of them are radio-loud, and exhibit two opposite prominent plasma jets extending from the proximity of the supermassive black hole up to megaparsec distances.
Claudia M. Raiteri, Massimo Villata
doaj +1 more source
Multiwavelength and Neutrino Emission from Blazar PKS 1502 + 106 [PDF]
Astrophysical Journal, 2020 In 2019 July, the IceCube experiment detected a high-energy neutrino from the direction of the powerful blazar PKS 1502+106. We perform multiwavelength and multimessenger modeling of this source, using a fully selfconsistent one-zone model that includes ...
X. Rodrigues +5 more
semanticscholar +1 more source
SYNCHROTRON POLARIZATION IN BLAZARS [PDF]
The Astrophysical Journal, 2014 We present a detailed analysis of time- and energy-dependent synchrotron polarization signatures in a shock-in-jet model for gamma-ray blazars. Our calculations employ a full 3D radiation transfer code, assuming a helical magnetic field throughout the jet.
Haocheng Zhang +2 more
openaire +5 more sources
FLARING PATTERNS IN BLAZARS [PDF]
The Astrophysical Journal, 2011 6 pages, 3 figures, accepted for publication in The Astrophysical ...
Paggi, A. +4 more
openaire +2 more sources
Dissecting the regions around IceCube high-energy neutrinos: growing evidence for the blazar connection [PDF]
, 2020 The association of two IceCube detections, the IceCube-170922A event and a neutrino flare, with the blazar TXS0506+056, has paved the way for the multimessenger quest for cosmic accelerators.
P. Giommi +5 more
semanticscholar +1 more source