The core dominance parameter of extragalactic radio sources

Details The core dominance parameter of extragalactic radio sources The core dominance parameter of extragalactic radio sources

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...407..899f&link_type=abstract

Astronomy and Astrophysics, v.407, p.899-904 (2003)

Astronomy and Astrophysics

Astrophysics

13

Bl Lacertae Objects: General, Quasars: General, Galaxies: Seyfert, Galaxies: Jets

Scientific paper

In this paper, based on a paper by Liu and Zhang (2002), 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. log R = -1.40 +/-0.74 for galaxies, log R = -0.53 +/-0.92 for quasars, and log R = 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.
Table 1 is only available in electronic form at http://www.edpsciences.org

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