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The parsec-scale radio jet of 4C 39.25
Alberdi, A.; Marcaide, J. M.; Marscher, A. P.; Zhang, Y. F.; Elosegui, P.; Gomez, J. L.; Shaffer, D. B.
AA(Andalucia, Inst. de Astrofisica, Granada, Spain), AB(Andalucia, Inst. de Astrofisica, Granada; Valencia Univ., Burjassot, Spain), AC(Boston University, MA), AD(Boston University, MA), AE(Andalucia, Inst. de Astrofisica, Granada, Spain; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA), AF(Andalucia, Inst. de Astrofisica, Granada, Spain), AG(Interferometrics, Inc., Vienna, VA)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 402, no. 1, p. 160-172. (ApJ Homepage)
Publication Date:
NASA/STI Keywords:
Quasars, Radio Jets (Astronomy), Relativistic Plasmas, Very Long Base Interferometry, Astronomical Maps, Shock Wave Propagation
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The parsec-scale radio jet of the peculiar superluminal quasar 4C 39.25 is studied. Different observing epochs at 1.3, 2.8, and 3.6 cm are analyzed, and maps clarifying the structure and kinematics of 4C 39.25 are presented. The source consists of a curved jet. A new component is detected at 1.3 cm which is a plausible candidate to be the 'core' of the radio source. The structure of a superluminal source is analyzed in terms of shock waves traveling along a supersonic jet. A geometry and a set of physical parameters that reproduce the structure of 4C 39.25 are reported.

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