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The Compact Radio S...
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Bartel, N.Department of Earth and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA; Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA & Harvard-Smithsonian Astrophysical Observatory, Cambridge, MA, USA
(författare)
The Compact Radio Source 2021+614 : Simultaneous 2.3 and 8.3 GHz Mark III VLBI Observations
- Artikel/kapitelEngelska1984
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Philadelphia, PA :Institute of Physics Publishing (IOPP),1984
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LIBRIS-ID:oai:DiVA.org:hh-22784
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https://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-22784URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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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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Shapiro, I.I.Department of Earth and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA; Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA & Harvard-Smithsonian Astrophysical Observatory, Cambridge, MA, USA
(författare)
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Corey, B.E.NEROC, Haystack Observatory, Westford, MA, USA
(författare)
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Marcaide, J.M.Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA & Max-Planck-Institut für Radioastronomie, Bonn, Germany
(författare)
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Rogers, A.E.E.NEROC, Haystack Observatory, Westford, MA, USA
(författare)
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Whitney, A.R.NEROC, Haystack Observatory, Westford, MA, USA
(författare)
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Cappallo, R.J.NEROC, Haystack Observatory, Westford, MA, USA
(författare)
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Kühr, H.Steward Observatory, Tucson, AZ, USA
(författare)
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Graham, D.Max-Planck-Institut für Radioastronomie, Bonn, Germany
(författare)
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Bååth, L.B.1948-Onsala Space Observatory, Chalmers University of Technology, Gothenburg, Sweden(Swepub:hh)baath
(författare)
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Department of Earth and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA; Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA & Harvard-Smithsonian Astrophysical Observatory, Cambridge, MA, USANEROC, Haystack Observatory, Westford, MA, USA
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Astrophysical JournalPhiladelphia, PA : Institute of Physics Publishing (IOPP)279:1, s. 116-1210004-637X1538-4357
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Bartel, N.
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Shapiro, I.I.
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Corey, B.E.
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Marcaide, J.M.
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Rogers, A.E.E.
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Whitney, A.R.
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visa fler...
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Cappallo, R.J.
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Kühr, H.
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Graham, D.
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Bååth, L.B. 1948 ...
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