395 citations · 2.4k across the 119 of their papers we have counts for
5 papers · 2 filters
Precessing Jet in the High-Redshift Blazar J0017+8135
Kristóf Rozgonyi, Sándor Frey
The prominent flat-spectrum radio quasar J0017+8135 (S5 0014+81) at z = 3.366 is one of the most luminous active galactic nuclei (AGN) known. Its milliarcsecond-scale radio jet str…
On the nature of bright compact radio sources at z>4.5
Rocco Coppejans, Sándor Frey, Dávid Cseh +7
High-redshift radio-loud quasars are used to, among other things, test the predictions of cosmological models, set constraints on black hole growth in the early universe and unders…
Four dual AGN candidates observed with the VLBA
K. É. Gabányi, T. An, S. Frey +4
According to hierarchical structure formation models, merging galaxies are expected to be seen in different stages of their coalescence. However, currently there are no straightfor…
What are the megahertz peaked-spectrum sources?
Rocco Coppejans, David Cseh, Sjoert van Velzen +8
Megahertz peaked-spectrum (MPS) sources have spectra that peak at frequencies below 1 GHz in the observer's frame and are believed to be radio-loud active galactic nuclei (AGN). We…
HESS J1943+213: a non-classical high-frequency-peaked BL Lac object
Samayra M. Straal, Krisztina E. Gabanyi, Joeri van Leeuwen +5
HESS J1943+213 is an unidentified TeV source that is likely a high-frequency-peaked BL Lac (HBL) object but also compatible with a pulsar wind nebula (PWN) nature. Each of these en…