J/MNRAS/362/9 Radio-loud AGN in SDSS (Best+, 2005)
A sample of radio-loud active galactic nuclei in the Sloan Digital Sky Survey.
Best P.N., Kauffmann G., Heckman T.M., Ivezic Z.
<Mon. Not. R. Astron. Soc., 362, 9-24 (2005)>
=2005MNRAS.362....9B 2005MNRAS.362....9B
ADC_Keywords: Surveys ; Galaxies, radio ; Active gal. nuclei ; Redshifts
Keywords: surveys - galaxies: active - galaxies: evolution -
galaxies: luminosity function, mass function - galaxies: starburst -
radio continuum: galaxies
Abstract:
A sample of 2712 radio-luminous galaxies is defined from the second
data release of the Sloan Digital Sky Survey (SDSS) by cross-comparing
the main spectroscopic galaxy sample with two radio surveys: the
National Radio Astronomy Observatories (NRAO) Very Large Array (VLA)
Sky Survey (NVSS, VIII/65) and the Faint Images of the Radio Sky at
Twenty centimeters (FIRST, VIII/71) survey. The comparison is
carried out in a multistage process and makes optimal use of both
radio surveys by exploiting the sensitivity of the NVSS to extended
and multicomponent radio sources in addition to the high angular
resolution of the FIRST images. A radio source sample with 95 per cent
completeness and 98.9% reliability is achieved, far better than would
be possible for this sample if only one of the surveys was used. The
radio source sample is then divided into two classes: radio-loud
active galactic nuclei (AGN) and galaxies in which the radio emission
is dominated by star formation. The division is based on the location
of a galaxy in the plane of 4000Å break strength versus radio
luminosity per unit stellar mass and provides a sample of 2215
radio-loud AGN and 497 star-forming galaxies brighter than 5mJy at
1.4GHz. A full catalogue of positions and radio properties is provided
for these sources.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 84 2712 Properties of the 2712 SDSS radio galaxies
--------------------------------------------------------------------------------
See also:
II/259 : The SDSS Photometric Catalog, Release 3 (Abazajian+ 2005)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- IDPlate Plate identification number (from SDSS)
6- 12 I7 d JD Julian Date of observation (from SDSS)
14- 16 I3 --- IDFibre Fibre identification number (from SDSS)
18- 26 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
28- 35 F8.4 deg DEdeg Declination in decimal degrees (J2000)
37- 42 F6.4 --- z Redshift
44- 49 F6.4 Jy SNVSS NVSS (VIII/65) 1.4GHz integrated flux
density of the source
51 I1 --- Cl Radio class (1)
53- 58 F6.4 Jy SFIRST ?=- FIRST (VIII/71) 1.4GHz integrated flux
density of the central FIRST component (2)
60- 63 F4.2 arcsec Offset ?=- Offset from the optical galaxy of
the central FIRST component (2)
65- 69 F5.2 arcsec Size ?=- Radio size of the central FIRST
component (2)
71- 84 A14 --- Type Classification of the source
--------------------------------------------------------------------------------
Note (1): Radio classes as follows:
1 = single-component NVSS sources with a single FIRST match
2 = single-component NVSS sources resolved into multiple
components by FIRST
3 = single-component NVSS source without a FIRST counterpart
4 = sources are those which have multiple NVSS components
Note (2): Where a galaxy has a central FIRST (VIII/71) component, the
integrated flux density, offset from the optical galaxy, and
radio size of that central FIRST component are given.
--------------------------------------------------------------------------------
Acknowledgements:
Philip Best, pnb(at)roe.ac.uk
(End) Patricia Vannier [CDS] 19-Apr-2006