395 citations · 2.7k across the 108 of their papers we have counts for
13 papers · 1 filter
Is there a sub-parsec-scale jet base in the nearby dwarf galaxy NGC 4395?
Jun Yang, Xiaolong Yang, Joan M. Wrobel +6
NGC 4395 is a dwarf galaxy at a distance of about 4.3 Mpc (scale: ~0.021 pc mas). It hosts an intermediate-mass black hole (IMBH) with a mass between ~10 and ~10 sol…
Structural and spectral properties of Galactic plane variable radio sources
Jun Yang, Yongjun Chen, Leonid I. Gurvits +4
In the time domain, the radio sky in particular along the Galactic plane direction may vary significantly because of various energetic activities associated with stars, stellar and…
Probing the innermost regions of AGN jets and their magnetic fields with RadioAstron. V. Space and ground millimeter-VLBI imaging of OJ 287
Jose L. Gómez, Efthalia Traianou, Thomas P. Krichbaum +27
We present the first polarimetric space VLBI observations of OJ 287, observed with RadioAstron at 22 GHz during a perigee session on 2014 April 4 and five near-in-time snapshots, t…
A parsec-scale radio jet launched by the central intermediate-mass black hole in the dwarf galaxy SDSS J090613.77+561015.2?
Jun Yang, Leonid I. Gurvits, Zsolt Paragi +4
The population of intermediate-mass black holes (IMBHs) in nearby dwarf galaxies plays an important "ground truth" role in exploring black hole formation and growth in the early Un…
Simulations of imaging the event horizon of Sagittarius A* from space
Freek Roelofs, Heino Falcke, Christiaan Brinkerink +8
It has been proposed that Very Long Baseline Interferometry (VLBI) at sub-millimeter waves will allow us to image the shadow of the black hole in the center of our Milky Way, Sagit…
M87 black hole mass and spin estimate through the position of the jet boundary shape break
E. E. Nokhrina, L. I. Gurvits, V. S. Beskin +3
We propose a new method of estimating a mass of a super massive black hole residing in the center of an active galaxy. The active galaxy M87 offers a convenient test case for the m…