Results 71 to 80 of about 38,287 (310)
The power of blazar jets [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 MNRAS, in press, changed Fig.
Celotti, Anna Lisa, GHISELLINI G.
openaire +4 more sources
A New Multi-Wavelength Census of Blazars [PDF]
A&A 641, A62 (2020), 2020 Context:Blazars are the rarest and most powerful active galactic nuclei, playing a crucial and growing role in today multi-frequency and multi-messenger astrophysics. Current blazar catalogs, however, are incomplete and particularly depleted at low Galactic latitudes.
arxiv +1 more source
Near infrared polarimetry of a sample of blazars*
EPJ Web of Conferences, 2013 Polarization variability is one of the most ubiquitous characteristic of blazars. Near infrared (NIR)polarization measurements of blazars are not common, contrary to the optical ones.
Pulido J. A. Acosta +8 more
doaj +1 more source
Constraints on cosmic ray loading and PeV neutrino production in blazars [PDF]
JCAP03(2017)024, 2016 IceCube has detected a cumulative flux of PeV neutrinos, which origin is unknown. Blazars, active galactic nuclei with relativistic jets pointing to us, are long and widely expected to be one of the strong candidates of high energy neutrino sources.
arxiv +1 more source
The Nature of Micro-Variability in Blazars
Galaxies, 2021 We present the results of a long-term study designed to investigate the nature of micro-variability in blazars carried out primarily at the Southeastern Association for Research in Astronomy (SARA) observatories.
James R. Webb +8 more
doaj +1 more source
Self-consistent model of extragalactic neutrino flux from evolving blazar population [PDF]
JETP 158, 295 (2020), 2018 We study constraints on the population of neutrino emitting blazars imposed by the absence of doublets in astrophysical muon neutrino signal and z>0.3 redshift of nearest identified neutrino-emitting blazar (an order of magnitude further away than the nearest gamma-ray emitting blazar).
arxiv +1 more source
Radio variability of 1st 3-months Fermi blazars at 5 GHz: affected by interstellar scintillation? [PDF]
, 2011 Blazars from the first-three-months Fermi-AGN list were observed with the Urumqi 25m radio telescope at 5GHz in IDV (Intra-Day Variability) mode and inter-month observation mode.
A Kraus +13 more
core +1 more source
The Blazar Sequence and Its Physical Understanding
Galaxies, 2022 Introduced in 1998 to attempt a first unified view of the broad-band emission properties of blazars, the blazar sequence has been extensively used in the past 25 years to guide observations as well as the physical interpretation of the overall emission ...
Elisa Prandini, Gabriele Ghisellini
doaj +1 more source
Universe, 2022 Blazars are observed to emit non-thermal radiation across the entire electromagnetic spectrum from the radio to the very-high-energy γ-ray region. The broadband radiation measured from a blazar is dominated by emission from a relativistic plasma jet ...
Krishna Kumar Singh +4 more
doaj +1 more source
An extensive study of blazar broad emission line: Changing-look blazars and Baldwin effect [PDF]
, 2022 It is known that the blazar jet emissions are dominated by non-thermal radiation while the accretion disk jets are normally dominated by thermal emission. In this work, our aim is to study the connection between the two types of emission by investigating the correlation between the blazar emission line intensity property, which embodies the nature of ...
arxiv +1 more source