2003/04/09 by M. H. Cohen, M. A. Russo, Cohen, M. H. +13
Engineering · Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #Mechanical and Optical Resonators #Photonic and Optical Devices #Quantum optics and atomic interactions #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0304164
To be published in "Radio Astronomy at the Fringe", ASP Conf. Ser. Vol. 300, J. A. Zensus, M. H. Cohen, & E. Ros (eds.), 8 pages, 3 figures, needs rafringe.sty
openalex publication_date 2003/04/09 · arxiv created 2003/05/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 observations at 2 cm. The data are consistent with the relativistic beaming theory for compact radio sources, in that the distribution of betaapp/deltavar, for 30 quasars, is roughly consistent with a Monte Carlo simulation. The intrinsic temperature appears to be ~2x1010 K, close to the "equipartition value" calculated by Readhead (1994). We deduce the distribution of Lorentz factors for a group of 48 sources; the values range up to about gamma=40.