6.6k citations · 18.9k across the 126 of their papers we have counts for
126 papers
The 2015-2017 Large EVPA Rotation in OJ 287: Dominant Propagating Component in a Helical Magnetic Field with Time-Dependent Viewing Geometry
Wanchaloem Khwammai, Minchul Kam, Motoki Kino +11
We present high-cadence, multi-frequency monitoring of the blazar OJ 287 using KVN (22--129 GHz), ALMA (91.5--343.5 GHz), and Metsähovi (37 GHz), covering 2012--2023, together with…
NOCTURNE. II. Extreme radio variability in the heart of early-stage active galactic nuclei
Emilia Järvelä, Patrizia Romano, Anne Lähteenmäki +1
We report the discovery of extreme 37 GHz radio variability in early-stage active galactic nuclei (AGN). Most of these sources belong to the class of narrow-line Seyfert 1 (NLS1) g…
A Ring of Fire Orphan γ-Ray Flare in the Neutrino Candidate 3C 120
E. Traianou, G. Bruni, J. Rodi +7
We present 43\,GHz VLBI observations of the radio galaxy 3C~120 during its brightest -ray outburst (March 2018), recently associated with the IceCube neutrino alert IC-180213A.…
Revisiting radio variability of the blazar 3C 454.3
Ashutosh Tripathi, Alok C. Gupta, Krista Lynne Smith +7
We examine lengthy radio light curves of the flat spectrum radio galaxy 3C 454.3 for possible quasi-periodic oscillations (QPOs). The data used in this work were collected at five…
Unprecedented extreme high-frequency radio variability in early-stage active galactic nuclei
E. Järvelä, T. Savolainen, M. Berton +9
We report on the discovery of one of the most extreme cases of high-frequency radio variability ever measured in active galactic nuclei (AGN), observed on timescales of days and ex…
A host galaxy study of southern narrow-line Seyfert 1 galaxies
I. Varglund, E. Järvelä, S. Ciroi +4
We studied seven nearby narrow-line Seyfert 1 (NLS1) galaxies in - and -bands with redshifts varying from 0.019 to 0.092. This is the first multi-source study targeting the…