Query : 2003A&A...407..899F

2003A&A...407..899F - Astronomy and Astrophysics, volume 407, 899-904 (2003/9-1)

The core dominance parameter of extragalactic radio sources.


Abstract (from CDS):

In this paper, based on a paper by Liu and Zhang (2002A&A...381..757L), we have chosen a sample of 542 extragalactic sources (27 BL Lac objects, 300 galaxies (radio galaxies and Seyfert galaxies), and 215 quasars), for which we have calculated the core-dominance parameters and investigated the relation between core-dominance parameter and the core and extended luminosities. The core-dominance parameter of galaxies is smaller than that in quasars, which is smaller than that in BL Lac objects. logR=-1.40±0.74 for galaxies, logR=-0.53±0.92 for quasars, and logR=0.01±0.65 for BL Lac objects on average respectively. For quasars, there is clear correlation between the core-luminosity and core-dominance parameter and an anti-correlation between the extended luminosity and the core-dominance parameter, which is explained by the beaming effect.

Abstract Copyright:

Journal keyword(s): BL Lacertae objects: general - quasars: general - galaxies: Seyfert - galaxies: jets

VizieR on-line data: <Available at CDS (J/A+A/407/899): table1.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 0

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