J/MNRAS/375/931 Radio sources in the 6dFGS (Mauch+, 2007)
Radio sources in the 6dFGS: local luminosity functions at 1.4GHz for
star-forming galaxies and radio-loud AGN.
Mauch T., Sadler E.M.
<Mon. Not. R. Astron. Soc., 375, 931-950 (2007)>
=2007MNRAS.375..931M 2007MNRAS.375..931M
ADC_Keywords: Surveys ; Radio sources ; Cross identifications ; Redshifts
Keywords: surveys - galaxies: active -
galaxies: luminosity function, mass function - galaxies: starburst -
radio continuum: galaxies
Abstract:
We have identified 7824 radio sources from the 1.4GHz NRAO VLA Sky
Survey (NVSS, Cat. VIII/65) with galaxies brighter than K=12.75mag
in the Second Incremental Data Release of the 6 degree Field Galaxy
Survey (6dFGS DR2, Cat. VII/249). The resulting sample of redshifts
and optical spectra for radio sources over an effective sky area of
7076deg2 (about 17 per cent of the celestial sphere) is the largest
of its kind ever obtained. NVSS radio sources associated with galaxies
in the 6dFGS span a redshift range 0.003<z<0.3 and have median
z{bar}=0.043. Through visual examination of 6dF spectra we have
identified the dominant mechanism for radio emission from each galaxy.
60 per cent are fuelled by star formation and 40 per cent are fuelled
by an active galactic nucleus (AGN) powered by a supermassive black
hole. We have accurately determined the local radio luminosity
function (RLF) at 1.4GHz for both classes of radio source and have
found it to agree well with other recent determinations. From the RLF
of star-forming galaxies we derive a local star formation density of
0.022±0.001M☉/yr/Mpc3, in broad agreement with recent
determinations at radio and other wavelengths.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 102 7824 6dFGS-NVSS data
--------------------------------------------------------------------------------
See also:
VII/249 : 6dF Galaxy Survey DR2 (Jones+, 2005)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
VIII/78 : Sydney University Molonglo Sky Survey (SUMSS) (Mauch+ 2006)
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- 6dFGS Target name of the object from 6dFGS database
19- 20 I2 h RAh 2MASS-XSC Right ascension (J2000)
22- 23 I2 min RAm 2MASS-XSC Right ascension (J2000)
25- 29 F5.2 s RAs 2MASS-XSC Right ascension (J2000)
31 A1 --- DE- 2MASS-XSC Declination sign (J2000)
32- 33 I2 deg DEd 2MASS-XSC Declination (J2000)
35- 36 I2 arcmin DEm 2MASS-XSC Declination (J2000)
38- 41 F4.1 arcsec DEs [0/60] 2MASS-XSC Declination (J2000)
45- 50 F6.3 mag Kmag Total K-band magnitude calculated from 2MASS
isophotal K magnitude
54- 60 F7.4 --- z 6dFGS measured redshift
62 I1 --- q_z Quality flag
66- 69 F4.1 arcsec Offset Offset from the NVSS (VIII/65) radio position
to the objects position in the 6dFGS database
71- 76 F6.1 mJy S1.4GHz NVSS 1.4GHz flux density
80- 85 F6.1 mJy S843MHz ? 843MHz flux density for 6dFGS objects with a
SUMSS (VIII/78) catalogue match within 10"
90- 95 F6.3 Jy S60um ? IRAS-FSC 60 micron flux density for 6dFGS
objects which also appear in additional
target sample 126 of the 6dFGS
99-102 A4 --- Class Classification of the spectrum (1)
--------------------------------------------------------------------------------
Note (1): Spectral classes as follows:
Aa = Pure absorption-line spectrum
Aae = Narrow LINER-like emission lines
Ae = Emission line AGNs
SF = Star-Forming galaxy
? = Unclassifiable or unknown
Star = Galactic star
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Sep-2007