Variability and Velocity of Superluminal Sources

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dc.creatorCohen, M. H.
dc.creatorRusso, M. A.
dc.creatorHoman, D. C.
dc.creatorKellermann, K. I.
dc.creatorLister, M. L.
dc.creatorVermeulen, R. C.
dc.creatorRos, E.
dc.creatorZensus, J. A.
dc.date2003-04-09
dc.date2003-05-06
dc.date.accessioned2026-07-07T02:08:12Z
dc.date.available2026-07-07T02:08:12Z
dc.descriptionWe 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 beta_{app}/delta_{var}, for 30 quasars, is roughly consistent with a Monte Carlo simulation. The intrinsic temperature appears to be ~2x10^{10} 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.
dc.descriptionTo 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
dc.identifierhttps://arxiv.org/abs/astro-ph/0304164
dc.identifierhttp://arxiv.org/abs/astro-ph/0304164
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/5954
dc.subjectAstrophysics
dc.titleVariability and Velocity of Superluminal Sources
dc.typetext

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