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The quasars 1038+528 A and B

Marcaide, J. M. (author)
Massachusetts Institute of Technology, Cambridge, MA, USA & Max-Planck-Institut für Radioastronomie, Bonn, Germany
Shapiro, I. I. (author)
Massachusetts Institute of Technology, Cambridge, MA, USA & Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA
Corey, B. E. (author)
Massachusetts Institute of Technology, Cambridge, MA, USA & Haystack Observatory/NEROC, Westford, MA, USA
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Cotton, W. D. (author)
National Radio Astronomy Observatory, Charlottesville, VA, United States
Gorenstein, M. V. (author)
Massachusetts Institute of Technology, Cambridge, MA, USA & Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA
Rogers, A. E. E. (author)
Haystack Observatory/NEROC, Westford, MA, USA
Romney, J. D. (author)
Max-Planck-Institut für Radioastronomie, Bonn, Germany
Schild, R. E. (author)
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA
Bååth, L.B. 1948- (author)
Onsala Space Observatory, Chalmers University of Technology, Gothenburg, Sweden
Bartel, N. (author)
Massachusetts Institute of Technology, Cambridge, MA, USA & Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA
Cohen, N. L. (author)
Massachusetts Institute of Technology, Cambridge, MA, USA; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA & Cornell University, Ithaca, NY, USA
Clark, T. A. (author)
NASA, Goddard Space Flight Center, Greenbelt, MD, USA
Preston, R. A. (author)
Jet Propulsion Laboratory, Pasadena, CA, USA
Ratner, M. I. (author)
Massachusetts Institute of Technology, Cambridge, MA, USA & Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA
Whitney, A. R. (author)
Haystack Observatory/NEROC, Westford, MA, USA
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 (creator_code:org_t)
Les Ulis : EDP Sciences, 1985
1985
English.
In: Astronomy and Astrophysics. - Les Ulis : EDP Sciences. - 0004-6361 .- 1432-0746. ; 142:1, s. 71-84
Related links:
http://adsabs.harvar...
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https://urn.kb.se/re...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The results of VLBI observations of the quasars 1038 + 528 A and B at 2.8, 3.6, 13, and 18 cm at various times between November 1979 and March 1981 are reported. The observations and data calibration are described, as are the mapping and astrometric techniques applied in the study. Both quasars are found to have 'core-jet' morphologies. The core of the A quasar dominates its morphology at centrimetric wavelengths with the brightness temperature of its 400 pc long jet being about 1/100 that of the core. By contrast, the 'jet' in the B quasar is very short (about 70 pc); the tail of this jet has the steepest spectral index found to date in extragalactic compact sources, indicating that high electron losses are responsible for the shortness of the jet. No evidence for appreciable morphological change in the B quasar was found over the time span of the study, whereas a new feature may be emerging from the A quasar core at superluminal speed.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Keyword

VLBI
mapping
astrometry
radiosources
quasars

Publication and Content Type

ref (subject category)
art (subject category)

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