2 papers
gr-qc2009
Black Holes in Active Galactic Nuclei
M. J. Valtonen, S. Mikkola, D. Merritt +7
Supermassive black holes are common in centers of galaxies. Among the active galaxies, quasars are the most extreme, and their black hole masses range as high as to $6\cdot 10^{10}…
astro-ph2005
The luminous host galaxies of high redshift BL Lac objects
J. K. Kotilainen, T. Hyvonen, R. Falomo
(abridged) We present near-infrared Ks-band imaging of 13 high redshift (0.6 < z < 1.3) BL Lac objects. We clearly detect the host in eight objects, and marginally in three others.…