J/AJ/126/119 Optical and radio data for rich Abell clusters (Rizza+, 2003)
Sensitive radio and optical observations of z∼0.2 rich Abell clusters.
Rizza E., Morrison G.E., Owen F.N., Ledlow M.J., Burns J.O., Hill J.
<Astron. J. 126, 119 (2003)>
=2003AJ....126..119R 2003AJ....126..119R
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Redshifts ; Photometry ;
Radio continuum
Keywords: galaxies: active - galaxies: clusters: general - galaxies: starburst -
radio continuum
Abstract:
We present optical observations and radio continuum imaging data for a
sample of rich, X-ray-bright Abell clusters at intermediate (z∼0.2)
redshifts. We find that the radio galaxy population varies
substantially from cluster to cluster within this homogeneous sample.
The spatial distribution of the high-luminosity radio galaxies (HLRGs;
L1.4>1023W/Hz) is very different from the low-luminosity radio
galaxies (LLRGs; L1.4≤1022.75W/Hz), with the LLRGs displaying a
flat spatial distribution in contrast to the centrally peaked HLRGs. A
color-morphology classification shows that the HLRGs are composed
primarily of galaxies with old stellar populations, whereas the LLRGs
have a much more diverse composition. We do not see a correlation
between the cluster radio fraction and cluster blue fraction. However,
there is a moderate anticorrelation with richness, suggesting that a
rich cluster is less likely to have radio-bright galaxies, whether the
radio emission is due to active galactic nuclei or star formation.
Description:
The optical imaging was performed using the Kitt Peak National
Observatory (KPNO) 0.9m telescope with the T2K CCD. The observations
were acquired over 10 nights divided into two observing runs during
1998 April 30 to May 3 and 1998 November 1923.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 65 22 Cluster sample
table2.dat 43 16 Radio flux limits
table3.dat 80 157 Radio Identifications
table4.dat 40 15 Radio contamination estimates
table5.dat 72 150 Concentration Index Results
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See also:
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
J/ApJS/146/267 : Very rich Abell clusters radio analysis (Morrison+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Abell Abell cluster name (ANNNN)
6 A1 --- n_Abell [ab] Note on Abell (1)
8- 9 I2 h RAh Right ascension (J2000.0)
11- 12 I2 min RAm Right ascension (J2000.0)
14- 17 F4.1 s RAs Right ascension (J2000.0)
19 A1 --- DE- Declination sign (J2000.0)
20- 21 I2 deg DEd Declination (J2000.0)
23- 24 I2 arcmin DEm Declination (J2000.0)
26- 27 I2 arcsec DEs Declination (J2000.0)
29- 33 F5.3 --- z Redshift
35- 38 F4.2 ct/s CR RASS count rate measured in a 90" detect cell
40- 42 I3 --- N0.5 ? Richness within 0.5Mpc (2)
44- 49 F6.3 --- fB ? Blue galaxies fraction
51- 52 I2 --- NRG ? Number of radio galaxies identifications
54 I1 --- NzRG ? Number of confirmed redshifts for radio
galaxies identifications
57- 60 F4.2 --- fRG ? Radio galaxies fraction
62- 65 F4.2 --- fLLRG ? Low-luminosity radio galaxies fraction
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Note (1): Notes as follows:
a = X-ray data only.
b = Optical and radio analysis from Morrison (1999, Ph.D. thesis,
Univ. New Mexico), Morrison et al. (2003, Cat. J/ApJS/146/267)
Morrison et al. (2003AJ....125..506M 2003AJ....125..506M).
Note (2): The number of galaxies within 0.5Mpc of the cluster center with
RMAG≤-20.5 were counted. All galaxies above this same detection limit
in the background field were then counted. The number of background
counts was normalized by the ratio of the two areas, and this number
was subtracted from the total cluster counts, yielding a value for N0.5.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Abell Abell cluster name (ANNNN)
7- 8 I2 h RAh Right ascension (J2000.0)
10- 11 I2 min RAm Right ascension (J2000.0)
13- 16 F4.1 s RAs Right ascension (J2000.0)
18 A1 --- DE- Declination sign (J2000.0)
19- 20 I2 deg DEd Declination (J2000.0)
22- 23 I2 arcmin DEm Declination (J2000.0)
25- 26 I2 arcsec DEs Declination (J2000.0)
28- 32 F5.3 --- z Redshift
34- 37 F4.1 --- rms rms noise of radio map
39- 43 F5.2 [W/Hz] log(L1.4GHz) 4σ radio luminosity at 1.4GHz limit
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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- 5 A5 --- Abell Abell cluster number
7- 8 I2 --- Seq Galaxy identification number (1)
10- 11 I2 h RAh Hour of right ascension (J2000)
13- 14 I2 min RAm Minute of right ascension (J2000)
16- 20 F5.2 s RAs Second of right ascension (J2000)
22 A1 --- DE- Sign of the declination (J2000)
23- 24 I2 deg DEd Degree of declination (J2000)
26- 27 I2 arcmin DEm Arcminute of declination (J2000)
29- 33 F5.2 arcsec DEs Arcsecond of declination (J2000)
35- 39 F5.3 --- z ? Redshift
41 A1 --- f_z Flag on z (2)
43- 46 F4.2 Mpc Dist Linear projected distance from the
cluster center
50- 55 F6.2 mag RMAG Absolute R-band magnitude
57- 60 F4.2 mag B-R The (B-R) color index
62- 65 F4.2 mag e_B-R ? Error in B-R (3)
67- 71 F5.2 [W/Hz] L1.4GHz Logarithm of the 1.4GHz radio luminosity
73- 76 F4.2 arcsec Size ? Angular size of radio source
78 A1 --- f_Size [e] Indicates an extended source
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Note (1): Objects identified as [RMO2003] ACO NNNN NN in Simbad.
Note (2): References for redshifts as follows:
a = Redshifts obtained with MX;
b = Kristian, Sandage, & Westphal, 1978ApJ...221..383K 1978ApJ...221..383K;
c = Quintana & Ramirez, 1995, Cat. J/ApJS/96/343
d = Huchra et al., 1990, Cat. J/ApJ/365/66
e = Allen et al., 1992MNRAS.259...67A 1992MNRAS.259...67A
f = Owen, White, & Burns, 1992, Cat. J/ApJS/80/501
g = Yee et al., 1996, Cat. J/ApJS/102/289
h = Crawford et al., 1995MNRAS.274...75C 1995MNRAS.274...75C
Note (3): Includes both the counting and calibration errors.
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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- 5 A5 --- Abell Abell cluster name (ANNNN)
7- 8 I2 h RAh Right ascension (J2000.0)
10- 11 I2 min RAm Right ascension (J2000.0)
13- 16 F4.1 s RAs Right ascension (J2000.0)
18 A1 --- DE- Declination sign (J2000.0)
19- 20 I2 deg DEd Declination (J2000.0)
22- 23 I2 arcmin DEm Declination (J2000.0)
25- 26 I2 arcsec DEs Declination (J2000.0)
28- 32 F5.3 --- z Redshift
34- 35 I2 --- RG ? Number of radio galaxies
37 I1 --- NzRG ? Number of confirmed redshifts for radio
galaxies
40 I1 --- e_RG Estimated error in radio galaxy count
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Abell Abell cluster number
7- 8 I2 --- Seq Galaxy identification number
10- 11 I2 h RAh Hour of right ascension (J2000)
13- 14 I2 min RAm Minute of right ascension (J2000)
16- 20 F5.2 s RAs Second of right ascension (J2000)
22 A1 --- DE- Sign of the declination (J2000)
23- 24 I2 deg DEd Degree of declination (J2000)
26- 27 I2 arcmin DEm Arcminute of declination (J2000)
29- 33 F5.2 arcsec DEs Arcsecond of declination (J2000)
35- 39 F5.3 --- z ? Redshift
41- 44 F4.2 Mpc Dist Linear projected distance from the
cluster center
46- 50 F5.3 --- Con Concentration index
52- 57 F6.3 mag/arcsec2 SB Mean surface brightness
59- 62 F4.2 mag B-R The (B-R) color
64- 67 F4.2 mag e_B-R ? Error in B-R
69- 71 A3 --- Pop Population classification (1)
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Note (1): Population classification as follows:
Old = old;
SB = starbursting;
Int = intermediate.
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History:
* 26-Sep-2003: From electronic version of the journal
* 20-Jan-2006: Flags in table3 corrected
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 26-Sep-2003