5 papers
On the influence of radio galaxies on cooling flows: M87 and Cygnus A
Andrew S. Wilson, Andrew J. Young, David A. Smith
Results from Chandra studies of the intracluster medium around M87 and Cygnus A are summarized.
Host galaxies and nuclear structure of AGN with H_2O megamasers as seen with HST
Heino Falcke, Christian Henkel, Andrew S. Wilson +1
We present results of an HST survey in Halpha and continuum filters of a sample of H_2O megamaser galaxies compiled by Braatz et al., all of which contain AGN. These observations a…
Radio-Variability in Radio-Quiet Quasars and Low-Luminosity AGN
Heino Falcke, Joseph Lehar, Richard Barvainis +2
We report on two surveys of radio-weak AGN to look for radio variability. We find significant variability with an RMS of 10-20% on a timescale of months in radio-quiet and radio-in…
VLA and VLBA observations of compact radio cores in LINER galaxies
Heino Falcke, Luis C. Ho, James S. Ulvestad +2
A VLA survey of nearby LINER galaxies at 15 GHz has revealed the presence of a compact radio core in many sources. The cores seem to be correlated with the optical activity. Follow…
H_2O megamaser emission from FR I radio galaxies
C. Henkel, Y. P. Wang, H. Falcke +2
A systematic search for 22 GHz H2O megamaser emission is reported for 50 nearby (z < 0.15) FR I galaxies. No detection was obtained, implying that ultraluminous H2O masers (L_H2O>1…