239 citations · 2k across the 38 of their papers we have counts for
38 papers
Milliarcsecond-scale radio structure of the most distant BL Lac object candidate at redshift 6.57
S. Frey, Y. Zhang, K. Perger +7
The existence of accreting supermassive black holes up to billions of solar masses at early cosmological epochs (in the context of this work, redshifts z>=6) requires very fast gro…
High-resolution Imaging of Two Radio Quasars at the End of the Reionization Epoch
Krisztina Perger, Yingkang Zhang, Sándor Frey +7
There are approximately 250 quasars discovered at redshift , of which only a handful were detected in radio bands, and even fewer were imaged with the highest resolution ve…
Rapidly accreting black hole of the Lyα-luminous quasar PSO J006.1240+39.2219
Ekaterina Koptelova, Chorng-Yuan Hwang, Matthew A. Malkan +1
We present near-infrared 1.1-1.3 and 1.3-1.6 m spectra of the Ly-luminous quasar PSO J006.1240+39.2219 at obtained with the NIRSPEC spectrograph at the Keck-II tele…
A luminous molecular gas pair beyond redshift 7
Ekaterina Koptelova, Chorng-Yuan Hwang
We report the first detection of molecular gas beyond redshift 7. The molecular gas is associated with the host galaxy of the quasar candidate PSO J145.5964+19.3565 and its compani…
Dissecting the long-term emission behaviour of the BL Lac object Mrk 421
M. I. Carnerero, C. M. Raiteri, M. Villata +4
We report on long-term multi-wavelength monitoring of blazar Mrk 421 by the GASP-WEBT collaboration and Steward Observatory, and by the Swift and Fermi satellites. We study the sou…
Discovery of a very Lyman--luminous quasar at z=6.62
Ekaterina Koptelova, Chorng-Yuan Hwang, Po-Chieh Yu +2
Distant luminous quasars provide important information on the growth of the first supermassive black holes, their host galaxies and the epoch of reionization. The identification of…