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Quasar 4C39.25 is not contractingA map has been made of the quasar 4C39.25, which has been described as consisting of two components whose angular separation remains constant at about 2 marc-sec, using VLBI observations made at 3.6 cm during 1983. From the map it is concluded that Shaffer's (1984) suggestion that this source may have been contracting superluminally during 1979-82 is not correct. Three distinct components are found in the quasar structure, two separated by 2.0 marc-sec and a third, presumably new and not previously reported, situated between the other two. It is possible either that the third component is stationary and that its flux density has rapidly increased to render it visible, or that it has recently been ejected from the westernmost component.
Document ID
19850050011
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Marcaide, J. M.
(Max-Planck-Institut fuer Radioastronomie Bonn, Germany)
Bartel, N.
(Max-Planck-Inst. fuer Radioastronomie Bonn, Germany)
Gorenstein, M. V.
(Max-Planck-Inst. fuer Radioastronomie Bonn, Germany)
Shapiro, I. I.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Corey, B. E.
(Max-Planck-Inst. fuer Radioastronomie Bonn, Germany)
Rogers, A. E. E.
(Max-Planck-Inst. fuer Radioastronomie Bonn, Germany)
Webber, J. C.
(Haystack Observatory Westford, MA, United States)
Clark, T. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Romney, J. D.
(National Radio Astronomy Observatory Charlottesville, VA, United States)
Preston, R. A.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Date Acquired
August 12, 2013
Publication Date
April 4, 1985
Publication Information
Publication: Nature
Volume: 314
ISSN: 0028-0836
Subject Category
Astrophysics
Accession Number
85A32162
Funding Number(s)
CONTRACT_GRANT: JPL-956542
Distribution Limits
Public
Copyright
Other

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