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Sub-milliarcsecond radio structure of three quasars
Yunnan Observatory, Chinese Academy of Sciences, 650011, Kunming, China.
Yunnan Observatory, Chinese Academy of Sciences, 650011, Kunming, China.
Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).ORCID iD: 0000-0002-4826-019X
Yunnan Observatory, Chinese Academy of Sciences, 650011, Kunming, China.
2001 (English)In: Chinese Astronomy and Astrophysics, ISSN 0275-1062, E-ISSN 1879-128X, Vol. 25, no 1, p. 23-28Article in journal (Refereed) Published
Abstract [en]

The quasars, 0420-014, 0748+126 and 2251+158 (3C 454.3), have been observed at 1.3 cm with a global VLBI network. We have obtained the hybrid maps of the quasars at sub-milliarcsecond resolution. The brightness distribution is revealed in their nuclear regions. The observed data are fitted with a small number of Gaussian components. 2251+158 shows a core-jet structure, and its nuclear region is elongated in the direction PA= -130o. The jet is curved. Its observations at the epoch 1992.9 show it to be in the course of a large burst, accompanied by several smaller ones. The strongest component has a flux of ~ 4.11 Jy (67% of the total detected flux), mostly from an area of 0.16 x 0.01 mas. Doppler boosting is probably responsible for raising the brightness temperature up to 2.6 x 1012 K.

Place, publisher, year, edition, pages
Elsevier , 2001. Vol. 25, no 1, p. 23-28
Keywords [en]
quasar, radio emission, sub-milliarcsecond structure
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:hh:diva-1839DOI: 10.1016/S0275-1062(01)00039-XISI: 000167510400003Scopus ID: 2-s2.0-0346941258Local ID: 2082/2234OAI: oai:DiVA.org:hh-1839DiVA, id: diva2:239057
Note

A translation of Acta Astrophys. Sin. Vol. 20, No. 4 349-354, 2000

Available from: 2008-09-03 Created: 2008-09-03 Last updated: 2017-12-13Bibliographically approved

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Bååth, Lars B.

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