102 citations · 363 across the 13 of their papers we have counts for
13 papers
MOJAVE XIX: Brightness Temperatures and Intrinsic Properties of Blazar Jets
D. C. Homan, M. H. Cohen, T. Hovatta +7
We present multi-epoch, parsec-scale core brightness temperature observations of 447 AGN jets from the MOJAVE and 2cm Survey programs at 15 GHz from 1994 to 2019. The brightness te…
Reversals in the Direction of Polarization Rotation in OJ 287
M. H. Cohen, H. D. Aller, M. F. Aller +7
We have obtained a smooth time series for the Electric Vector Position Angle (EVPA) of the blazar OJ 287 at centimeter wavelengths, by making adjustments to archival value…
Relativistic Phenomena in Active Galactic Nuclei
M. H. Cohen, M. L. Lister, R. C. Vermeulen
The idea that the radio jets in AGN contain material in relativistic motion is supported by many lines of observational evidence, including morphology, brightness temperature estim…
Variability and Velocity of Superluminal Sources
M. H. Cohen, M. A. Russo, D. C. Homan +5
We investigate the relation between the Doppler factor determined from variations in total flux at 22 and 37 GHz, and the apparent transverse velocity determined from VLBA observat…
Jet Collimation in Action: Re-alignment on Kiloparsec Scales in 3C279
D. C. Homan, M. L. Lister, K. I. Kellermann +5
We report a change in the trajectory of a well studied jet component of the quasar 3C279. The component changes in apparent projected speed and direction, and we find it to be movi…
Superluminal Motion and Relativistic Beaming in Blazar Jets
K. I. Kellermann, M. L. Lister, D. C. Homan +5
High resolution radio observations remain the most direct way to study the formation and evolution of radio jets associated with the accretion onto massive black holes. We report p…