J/MNRAS/333/100 Radio galaxies in the 2dFGRS (Magliocchetti+, 2002)
The 2dF Galaxy Redshift Survey:
the population of nearby radio galaxies at the 1-mJy level.
Magliocchetti M., Maddox S.J., Jackson C.A., Bland-Hawthorn J., Bridges T.,
Cannon R., Cole S., Colless M., Collins C., Couch W., Dalton G.,
de Propris R., Driver S.P., Efstathiou G., Ellis R.S., Frenk C.S.,
Glazebrook K., Lahav O., Lewis I., Lumsden S., Peacock J.A., Peterson B.A.,
Sutherland W., Taylor K.
<Mon. Not. R. Astron. Soc. 333, 100 (2002)>
=2002MNRAS.333..100M 2002MNRAS.333..100M
ADC_Keywords: Galaxies, radio ; Galaxies, Seyfert ; Active gal. nuclei ;
Spectroscopy
Keywords: galaxies: active - galaxies: starburst ; cosmology: observations -
radio continuum: galaxies
Abstract:
We use redshift determinations and spectral analysis of galaxies in
the 2dF Galaxy Redshift Survey (VII/226) to study the properties of
local radio sources with S≥1mJy. 557 objects (hereafter called the
spectroscopic sample) drawn from the FIRST survey(VIII/71) ,
corresponding to 2.3 per cent of the total radio sample, are found in
the 2dFGRS catalogue within the area 9h 48min≤RA≤14h 32min and
-2.77°≤DE≤2.25° (2000), down to a magnitude limit
bJ=19.45. The excellent quality of 2dF spectra allows us to divide
these sources into classes, according to their optical spectra.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table23.dat 150 556 Spectral identifications
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See also:
VII/226 : The 2dF Galaxy Redshift Survey (Colless+ 2001)
VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)
J/MNRAS/329/87 : 2dFGRS: galaxy clusters (de Propris+, 2002)
J/MNRAS/329/227 : 2dF Galaxy Redshift Survey. II. (Sadler+, 2002)
Byte-by-byte Description of file: table23.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- [MMJ2002] Sequential number
8- 9 I2 h RAh Right ascension (J2000.0) (1)
11- 12 I2 min RAm Right ascension (J2000.0)
14- 18 F5.2 s RAs Right ascension (J2000.0)
20 A1 --- DE- Declination sign (J2000.0)
21 I1 deg DEd Declination (J2000.0)
23- 24 I2 arcmin DEm Declination (J2000.0)
26- 29 F4.1 arcsec DEs Declination (J2000.0)
31- 34 F4.2 arcsec Off Offset of the optical counterpart in the APM
catalogue
36- 42 F7.2 Jy S1.4GHz Radio flux density at 1.4GHz
44- 48 F5.2 mag bJmag Optical counterpart apparent bJ magnitude
50- 54 F5.2 mag Rmag ? Optical counterpart R magnitude
55 A1 --- u_Rmag [?] Uncertainty flag on Rmag
57- 62 F6.4 --- z Redshift
64- 75 A12 --- Class Morphological class (2)
77-120 A44 --- EmLines Emission lines detected ordered from the most
to the least prominent (3)
122-151 A30 --- Notes Notes
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Note (1): The position corresponds to the FIRST radio coordinates, except in
the case of objects with double or triple substructures, where the
coordinates are the centroid of the source and are obtained by
following the procedure illustrated by Magliocchetti et al.
(1998MNRAS.300..257M 1998MNRAS.300..257M) to combine multicomponent objects.
Note (2): Classes are written as follows:
Early = Early-type galaxies, where spectra were dominated by continua
much stronger than the intensity of any emission line. These
objects can be further divided into two sub-classes:
galaxies with absorption lines only, and galaxies with
absorption lines+weak [O II] and Hα emission lines
denoting little star formation activity.
E+AGN = E+AGN-type galaxies, showing spectra typical of early-types
plus the presence of (narrow) emission lines such as [O II],
[O III], [N II] and [S II], which are strong if compared to
any Balmer line in emission and indicate the presence of
large, partially ionized transition regions, as is the case
in active galaxies.
Late = Late-type galaxies, where spectra show strong emission
(mainly Balmer) lines characteristic of star formation
activity, together with a detectable continuum.
SB = Starburst (SB) galaxies, with optical spectra characterized
by an almost negligible continuum with very strong emission
lines indicating the presence of intense star formation
activity.
Sy1 = Seyfert 1 galaxies, with spectra showing strong,
broad emission lines.
Sy2 = Seyfert 2 galaxies, where the continuum is missing and
spectra show only strong narrow emission lines due to the
presence of an active galactic nucleus.
Note (3): [N II] line appears only if its intensity is comparable with
that of Hα
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History:
From electronic version of the journal
(End) Patricia Bauer [CDS] 09-Jul-2002