An expert in extragalactic astronomy, Kinney has published more than 80 papers on quasars, blazars
, active galaxies and normal galaxies, and signatures of accretion disks in active galaxies.
Some have suggested that a transition to axion-like particles (and back again) could explain why more gamma rays reach us from black-hole-powered beacons called blazars
than we think should survive the trip (S&T: July 2012, p.
The two supermassive black holes discovered are at the center of, and power, extremely bright objects - in the same class as quasars and blazars
- called active galactic nuclei.
These accelerators include supernova remnants and active galaxies known as blazars
that shoot out blasts of particles.
are radio-loud active galactic nuclei (AGN) that are characterized by intense and rapid variability across the electromagnetic spectrum.
The extreme brightness and variability of blazars
result from a chance orientation that brings one jet almost directly in line with Earth.
to thunderstorms, from dark matter to supernova remnants, catch the highlights of NASA Fermi's first five years in space.
The prior catalogues produced by Fermi contain literally thousands of gamma-ray emitters in the far-flung cosmos, corresponding to objects such as blazars
and active galactic nuclei - both associated with black holes snacking at the centres of galaxies - or pulsars, fast-spinning neutron stars that flash our neighbourhood like a distant lighthouse.
Personally I [JT] have seen flickering visually in several dwarf novae and blazars
but U Gem is the only object where I have seen it occur on multiple occasions.
It's already found hundreds of massive black holes known as blazars
and has imaged the coldest known stars in the universe.
The fastest ' things' i n the Universe are blobs of superheated plasma that are ejected from black holes that are in the cores of extremely active galaxies known as blazars
About two-thirds of the material is dedicated to invited talks covering black holes, blazars
, active galactic nuclei and galactic masers, variability and high brightness objects, and radio stars.