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Sub-milliarcsecond ...
Sub-milliarcsecond radio structure of three quasars
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- Su, Bu-Mei (författare)
- Yunnan Observatory, Chinese Academy of Sciences, 650011, Kunming, China
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- Li, Yong-Sheng (författare)
- Yunnan Observatory, Chinese Academy of Sciences, 650011, Kunming, China
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- Bååth, Lars B. (författare)
- Högskolan i Halmstad,Maskinteknisk produktframtagning (MTEK)
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- Gao, Yi-Fei (författare)
- Yunnan Observatory, Chinese Academy of Sciences, 650011, Kunming, China
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(creator_code:org_t)
- Elsevier, 2001
- 2001
- Engelska.
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Ingår i: Chinese Astronomy and Astrophysics. - : Elsevier. - 0275-1062 .- 1879-128X. ; 25:1, s. 23-28
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- quasar
- radio emission
- sub-milliarcsecond structure
- Physics
- Fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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