C.D.S. - SIMBAD4 rel 1.7 - 2021.02.27CET05:17:36

2008A&A...489..517Y - Astronomy and Astrophysics, volume 489, 517-524 (2008/10-2)

Multi-frequency investigation of the parsec- and kilo-parsec-scale radio structures in high-redshift quasar PKS 1402+044.


Abstract (from CDS):

We investigate the frequency-dependent radio properties of the jet of the luminous high-redshift (z=3.2) radio quasar PKS 1402+044 (J1405+0415) by means of radio interferometric observations. The observational data were obtained with the VLBI Space Observatory Programme (VSOP) at 1.6 and 5GHz, supplemented by other multi-frequency observations with the Very Long Baseline Array (VLBA; 2.3, 8.4, and 15GHz) and the Very Large Array (VLA; 1.4, 5, 15, and 43GHz). The observations span a period of 7 years. We find that the luminous high-redshift quasar PKS 1402+044 has a pronounced ``core-jet'' morphology from the parsec to the kilo-parsec scales. The jet shows a steeper spectral index and lower brightness temperature with increasing distance from the jet core. The variation of brightness temperature agrees well with the shock-in-jet model. Assuming that the jet is collimated by the ambient magnetic field, we estimate the mass of the central object as ∼109M. The upper limit of the jet proper motion of PKS 1402+044 is 0.03mas/yr (∼3c) in the east-west direction.

Abstract Copyright:

Journal keyword(s): galaxies: individual: PKS 1402+044 - galaxies: active - galaxies: quasars: general - galaxies: jets - radio continuum: galaxies

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1412 2
2 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3839 2
3 QSO B1402+044 QSO 14 05 01.11981424 +04 15 35.8189966   19.86 19.53 19.22   ~ 172 1

    Equat.    Gal    SGal    Ecl

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