J/AJ/120/2269 Wide-Angle-Tailed radio galaxies redshifts (Pinkney+, 2000)
Substructure in clusters containing Wide-Angle-Tailed radio galaxies.
I. New redshifts.
Pinkney J., Burns J.O., Ledlow M.J., Gomez P.L., Hill J.M.
<Astron. J. 120, 2269 (2000)>
=2000AJ....120.2269P 2000AJ....120.2269P
ADC_Keywords: Galaxies, radio ; Redshifts ; Clusters, galaxy
Keywords: galaxies: clusters: general - galaxies: distances and redshifts -
galaxies: jets
Abstract:
We present new redshifts and positions for 635 galaxies in nine rich
clusters containing wide-angle tailed (WAT) radio galaxies. Combined
with existing data, we now have a sample of 18 WAT-containing clusters
with more than 10 redshifts. This sample contains a substantial
portion of the WAT clusters in the VLA 20 cm survey of Abell clusters,
including 75% of WAT clusters in the complete survey (z≤0.09), and
20% of WAT clusters with z>0.09. It is a representative sample, which
should not contain biases other than selection by radio morphology. We
graphically present the new data using histograms and sky maps. A
semiautomated procedure is used to search for emission lines in the
spectra in order to add and verify galaxy redshifts. We find that the
average apparent fraction of emission-line galaxies is about 9% in
both the clusters and the field. We investigate the magnitude
completeness of our redshift surveys with CCD data for a test case,
Abell 690. This case indicates that our galaxy target lists are deeper
than the detection limit of a typical MX exposure, and they are 82%
complete down to R=19.0. The importance of the uniformity of the
placement of fibers on targets is posited, and we evaluate this in our
data sets. We find some cases of nonuniformities which may influence
dynamical analyses. A second paper will use this database to look for
correlations between the WAT radio morphology and the cluster's
dynamical state.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 74 17 Radio properties of WATs
table3.dat 89 702 Velocities and positions of WAT cluster galaxies
table4.dat 39 8 Traditional velocity data for WAT clusterS
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Source name (based on B1950 position)
13- 22 A10 --- Cluster Source cluster (ANNNN)
24- 33 A10 --- AName Alternative name
35- 40 F6.4 --- z Redshift (1)
42- 45 F4.2 --- Ratio ? Ratio of radio galaxy cluster center
distance to the Abell radius
47- 51 F5.2 [W/Hz] Power The logarithmic radio power (2)
53- 56 I4 kpc Extent ? Maximum, projected, linear source size (3)
58- 66 A9 --- Morph Morphological type (4)
68- 74 A7 --- n_Name Notes on Name (5)
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Note (1): Redshift of the radio galaxy from Owen et al. (1988AJ.....95....1O 1988AJ.....95....1O,
1995, Cat. J/AJ/109/14).
Note (2): Calculated from flux densities given by Owen et al. (1992, 1993)
1992, Cat. J/ApJS/80/501, 1993ApJS...87..135O 1993ApJS...87..135O
or in O'Donoghue et al. (1990ApJS...72...75O 1990ApJS...72...75O) and assuming
H0=75km/s/Mpc and q0=0.0).
Note (3): Usually the size is between ends of the tails.
Note (4): Morphologies are suggested by Owen from the 20 cm survey
(Owen, private communication).
WAT = wide-angle tailed radio galaxy.
TJ = Twin Jet morphology.
Note (5):
Z = New redshifts presented in this paper.
I = Observed with Einstein IPC.
P = Observed with ROSAT PSPC.
O = High resolution radio data in O'Donaghue et al. (1990ApJS...72...75O 1990ApJS...72...75O).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cluster Source cluster (Abell NNNN) (1)
12- 15 I4 --- Galaxy Galaxy identification number (2)
17- 18 I2 h RAh Right Ascension (J2000)
20- 21 I2 min RAm Right Ascension (J2000)
23- 27 F5.2 s RAs Right Ascension (J2000)
29 A1 --- DE- Declination (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 39 F4.1 arcsec DEs Declination (J2000)
42- 43 A2 --- f_cz1 [em] Indicates cz1 measured from emission lines
45- 49 I5 km/s cz1 ? Category 1 heliocentric velocity (3)
51- 52 A2 --- f_cz2 [em] Indicates cz2 measured from emission lines
54- 58 I5 km/s cz2 ? Category 2 heliocentric velocity (4)
60- 64 F5.1 km/s e_cz1 Velocity error (for either cz1 or cz
66- 89 A24 --- n_Galaxy Notes on galaxy ID (5)
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Note (1): Abell 2462 = A3897
Note (2): The galaxies are identified as [PBL2000] ACO NNNN NNNN
and [PBL2000] 1313+073 NNN in Simbad
NOTE: the galaxy numbers in Abell 98 (records #94 to #114) were
increased by 1000 compared to the original version of table3
(e.g. Abell 98 1408 was numbered originally Abell 98 0408)
in order to avoid a confusion with similar numbers
(e.g. Abell 98 408 in records #78). This modification was
made in agreement with the author (Jason Pinkney), Sep. 2001
Note (3): Those galaxies with an average r value ≥3.5 and at least 4
templates in agreement
Note (4): Those galaxies with 3.0≤r<3.5 and at least 4 templates
in agreement
Note (5): Absorption line velocities are placed in the notes column if they
are significantly less certain than the emission line velocity.
The following codes pertain to the emission line survey:
H = hydrogen Balmer line;
O3 = [OIII] 4363, 4959 or 5007Å;
O2 = [OII] 3727Å;
O1 = [OI] 6300Å;
N1 = [NI] 5199Å;
N2 = [NII] 6548 or 6583Å;
Ne = [NeIII] 3869Å;
E+A = strong H absorption blueward of Ca lines;
s = pluralizes the preceding code to refer to 2 or more lines from
a species;
em = emission;
ab = absorption;
st = strong;
wk = weak;
? = uncertain.
WAT = wide-angle tailed radio galaxy;
TJ = Twin Jet morphology;
FD = Identification from Faber & Dressler, 1977AJ.....82..187F 1977AJ.....82..187F
BGH = Identification from Beers, Geller, & Huchra, 1982ApJ...257...23B 1982ApJ...257...23B
gE = giant elliptical, usually 2nd ranked in cluster.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cluster Cluster name (Abell NNNN) (1)
12- 14 I3 --- NTot Total number of galaxies
16- 17 I2 --- NMemb Number of cluster members
19- 23 I5 km/s Vel Mean velocity within 4000km/s of the WAT velocity
25- 27 I3 km/s e_Vel Uncertainty in Vel
29- 32 I4 km/s Sigma Velocity dispersion (2)
34- 36 I3 km/s e_Sigma Uncertainty in Sigma
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Note (1): Abell 98 refers to North and South
Note (2): Estimated by the standard deviation with a cosmological correction
factor of (1+z)-1.
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History:
* From AJ electronic version
* 04-Sep-2001: some galaxy numbers were increased by 1000 in table 3,
the the note (2) of table3 above.
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 12-Jan-2001