Access to Astronomical Catalogues

← Click to display the menu
J/A+A/407/899  Core dominance in extragalactic radio sources     (Fan+, 2003)

The core dominance parameter of extragalactic radio sources. Fan J.H., Zhang J.S. <Astron. Astrophys. 407, 899 (2003)> =2003A&A...407..899F
ADC_Keywords: QSOs ; Galaxies, Seyfert ; Radio sources Keywords: BL Lacertae objects: general - quasars: general - galaxies: Seyfert - galaxies: jets Abstract: In this paper, based on a paper by Liu and Zhang (2002, Cat. J/A+A/381/757), 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. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 43 542 Core-dominance parameters
See also: J/A+A/381/757 : List of extra-galactic radio jets (Liu+, 2002) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name IAU name of the radio source, HHMM+DDd (B1950.0) 10- 13 A4 --- Type Type of the source (1) 15- 19 F5.3 --- z Redshift 21- 25 F5.2 [W/Hz] logPtot Total luminosity at 1.4GHz 27- 31 F5.2 [W/Hz] logPc Core luminosity at 5GHz 33- 37 F5.2 --- logR05 Core-dominance parameter corresponding to αE=0.5 (2) 39- 43 F5.2 --- logR10 Core-dominance parameter corresponding to αE=1.0 (2)
Note (1): Type as follows: G = radio galaxy BL = BL Lac object Q = quasar S0.5 = Seyfert Type 0.5 galaxy S1 = Seyfert Type 1 galaxy S2 = Seyfert Type 2 galaxy S3 = Seyfert Type 3 galaxy Note (2): R=Pc/PE=[Pc/(Ptot-Pc)]*(1.4/5)-αE*(1+z)-αE To calculate the core-dominance parameter R at 5GHz, we assume that the spectral index (Sν∝ν) for the core is is αC=0.0 and the extended spectral index is αE=0.5 or 1.0.
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 10-Oct-2003
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service