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Search: WFRF:(Graham M. J.) > (1984)

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  • Bartel, N., et al. (author)
  • The Compact Radio Source 2021+614 : Simultaneous 2.3 and 8.3 GHz Mark III VLBI Observations
  • 1984
  • In: Astrophysical Journal. - Philadelphia, PA : Institute of Physics Publishing (IOPP). - 0004-637X .- 1538-4357. ; 279:1, s. 116-121
  • Journal article (peer-reviewed)abstract
    • Second-epoch VLBI observations of the flat-spectrum radio source 2021+614 made simultaneously at 2.3 and 8.3 GHz with the Mark III system are reported. The maps derived from these observations reveal a complex, frequency-dependent radio structure on the milliarcsecond scale. The object has four nearly collinear components oriented at a position angle of about 35 degrees and embedded in an extended region. Two of these are optically thin, one has a flat spectrum, and the other appears to be synchrotron self-absorbed in the frequency range 2.3-8.3 GHz. No significant structural variation is found at either frequency between epochs separated by about three years. The formal estimate of the transverse velocity between two components, one with a flat and the other with an inverted spectrum, is v/c = 0.7 + or - 2.3. Remarkable similarities between 2021+614 and the unusual source 0316+413 are discussed.
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  • Result 1-1 of 1
Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Graham, D. (1)
Marcaide, J.M. (1)
Rogers, A.E.E. (1)
Bååth, L.B. 1948- (1)
Bartel, N. (1)
Shapiro, I.I. (1)
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Corey, B.E. (1)
Whitney, A.R. (1)
Cappallo, R.J. (1)
Kühr, H. (1)
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University
Halmstad University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
1984 (1)Undo refine

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