The Central Parsecs of the Bright Quasar PKS 1921 - 293

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dc.creatorShen, Z. -Q.
dc.creatorMoran, J. M.
dc.creatorKellermann, K. I.
dc.date2002-09-12
dc.date.accessioned2026-07-07T02:05:07Z
dc.date.available2026-07-07T02:05:07Z
dc.descriptionWe report on a VLBA imaging study of the nearby bright southern blazar PKS 1921 - 293 (OV - 236). High resolution VLBA observations, made at four frequencies (5, 12, 15, and 43 GHz) over the period 1994 - 2000, have revealed a strongly curved jet extending out to about 50 parsecs from the presumed central engine. Two epoch VLBA observations, each simultaneously carried out at both 5 and 43 GHz, show a large position angle difference of 51 - 67 degrees between the jet emission at 5 and 43 GHz. Although the core of PKS 1921 - 293 has one of the highest brightness temperatures measured in any compact radio source, unlike other bright blazars it is not a source of gamma-ray emission. However, there is evidence in these images for superluminal motion within the central region (a few parsecs from the core) and within the north-east diffuse emission region. In all six-epoch 43 GHz images, two equally compact bright components within the central parsec are seen.
dc.description2 pages including 2 ps figures, to appear in the proceedings of IAU 8th Asian-Pacific Regional Meeting (July 2 - 5, 2002, Tokyo, Japan), eds: S. Ikeuchi, J. Hearnshaw and T. Hanawa
dc.identifierhttps://arxiv.org/abs/astro-ph/0209234
dc.identifierhttp://arxiv.org/abs/astro-ph/0209234
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/5009
dc.subjectAstrophysics
dc.titleThe Central Parsecs of the Bright Quasar PKS 1921 - 293
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