Results 1 to 10 of about 16,751 (259)
An Optical Overview of Blazars with LAMOST. I. Hunting Changing-look Blazars and New Redshift Estimates [PDF]
, 2021 The extragalactic γ-rays sky observed by the Fermi Large Area Telescope (LAT) is dominated by blazars. In the fourth release of the Fermi LAT Point Source Catalog (4FGL) are sources showing a multifrequency behavior similar to that of blazars but lacking
H. Peña-Herazo +8 more
semanticscholar +4 more sources
Astrophysical Neutrinos and Blazars [PDF]
Universe, 2021 We review and discuss recent results on the search for correlations between astrophysical neutrinos and γ-ray-detected sources, with many extragalactic studies reporting potential associations with different types of blazars.
P. Giommi, P. Padovani
semanticscholar +3 more sources
Blazars at the Cosmic Dawn [PDF]
Astrophysical Journal, 2020 The uncharted territory of the high-redshift (z ≳ 3) universe holds the key to understanding the evolution of quasars. In an attempt to identify the most extreme members of the quasar population, that is, blazars, we have carried out a multiwavelength ...
V. Paliya +7 more
semanticscholar +3 more sources
THE NATURE OF TRANSITION BLAZARS [PDF]
The Astrophysical Journal, 2014 14 pages, 11 Figures, ApJ ...
J. J. Ruan +6 more
openaire +5 more sources
The Central Engines of Fermi Blazars [PDF]
, 2021 We present a catalog of central engine properties, i.e., black hole mass (M BH) and accretion luminosity (L disk), for a sample of 1077 blazars detected with the Fermi Large Area Telescope.
V. Paliya +4 more
semanticscholar +3 more sources
Blazars at Very High Energies: Emission Modelling
Galaxies, 2022 Blazars are very broadband cosmic sources with spectra spanning over twenty orders of magnitude in frequency, down to the 100 MHz regime in the radio range, up to VHE at several tens of TeV.
Andreas Zech, Zech Andreas
exaly +3 more sources
BlazEr1: The eROSITA blazar catalog
Astronomy & AstrophysicsAims.eROSITA, on board the Spectrum Roentgen Gamma (SRG) spacecraft, performed its first X-ray all-sky survey (eRASS1) between December 2019 and June 2020.
Hämmerich S. +30 more
doaj +3 more sources
A Model of Polarisation Rotations in Blazars from Kink Instabilities in Relativistic Jets
Galaxies, 2017 This paper presents a simple model of polarisation rotation in optically thin relativistic jets of blazars. The model is based on the development of helical (kink) mode of current-driven instability.
Krzysztof Nalewajko +1 more
exaly +3 more sources
Astronomy and Astrophysics Supplement Series, 1998 The results of both BVRI CCD photometric monitoring and fast photometry for 8 blazars and variable quasars are presented. There is intraday variability for 6 blazars and very short timescales (minutes to two hours) variability for 5 objects. Implications for relativistic beaming are briefly discussed.
Guibin Jia +3 more
openaire +3 more sources
Near infrared polarimetry of a sample of blazars* [PDF]
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 +2 more sources