Multifrequency VLA, VLBI, and single-dish observations of the quasar 4C 39. 25

Journal Article · Mon Apr 01 00:00:00 EST 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/169912· OSTI ID:5541169

Marscher, A P; Zhang, Y Fei; Shaffer, D B; Aller, H D; Aller, M F ^[1]

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1. Boston University, MA (USA) Interferometrics, Inc., Vienna, PA (USA) Michigan, University, Ann Arbor (USA)

The quasar 4C 39.25 has been observed at four wavelengths using the VLA and at three wavelengths using VLBI, and variability data in integrated flux density and polarization at three wavelengths, obtained using a single antenna, have been analyzed. The resulting maps and light curves reveal that 4C 39.25 is in some ways similar to and in other ways substantially different from other superluminal sources. It is proposed that 4C 39.25 has the same intrinsic morphology as other superluminal radio sources, but differs in at least one parameter that governs the observed morphology of such sources. That parameter is identified as the angle of inclination of the compact jet to the line of sight. A model is considered in which the viewing angle of a curved, compact relativistic jet in the quasar is such that the jet bends almost directly into the line of sight at two positions and is somewhat misdirected where a strong core would ordinarily appear. 34 refs.

• OSTI ID: 5541169
• Journal Information: Astrophysical Journal; (United States), Vol. 371; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
QUASARS
MORPHOLOGY
RADIOASTRONOMY
INTERFEROMETRY
MAPS
PLASMA JETS
POLARIMETRY
RADIO GALAXIES
RADIO TELESCOPES
RELATIVISTIC RANGE
ANTENNAS
ASTRONOMY
COSMIC RADIO SOURCES
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
ENERGY RANGE
EQUIPMENT
GALAXIES
RADIO EQUIPMENT
TELESCOPES
640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar
Radio & X-Ray Sources