J/AJ/98/64 VLA survey of Abell clusters of galaxies I. (Zhao+ 1989)
A 20cm VLA survey of Abell clusters of galaxies. I. Distance class <3 clusters.
Zhao J.-H., Burns J.O., Owen F.N.
<Astron. J. 98, 64 (1989)>
=1989AJ.....98...64Z 1989AJ.....98...64Z
ADC_Keywords: Clusters, galaxy ; Radio sources ; X-ray sources
Abstract:
We report the results of a VLA survey at 20cm of a complete sample of
nearby Abell clusters (D≤3). We have compiled an extensive catalog of
cluster radio sources with S20>10mJy from a combination of our VLA
observations and observations of similar resolution with the
Westerbork Synthesis Radio Telescope (WSRT). Using these radio data
and X-ray data from the Einstein observatory, we have analyzed the
properties of these clusters. Unlike that previously suggested, no
significant correlation is found between 20cm radio power and X-ray
luminosity. There is weak evidence that richer clusters have a higher
probability of radio emission. Based on Rood-Sastry morphological
types of clusters, we do not find any strong evidence that
regular-type clusters are statistically more likely to be radio loud
than irregular-type clusters. However, Bautz-Morgan types I and II-III
are found to have comparable radio-detection rates; but Bautz-Morgan
Type III clusters are likely to have a lower radio-detection rate. A
weak correlation between X-ray-cooling mass-accretion rates and radio
powers was found for central, dominant galaxies in cooling-flow
clusters. This might suggest that either cooling accretion directly
fuels the central engine and/or cooling flows strongly interact with
(e.g., confine) the radio plasma. In addition, radio sources
associated with central dominant galaxies in cooling-flow clusters
tend to be small in comparison with those in non-cooling-flow
clusters. This might suggest that cooling flows tend to obstruct the
propagation of radio jets from central, dominant galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
cluster.dat 175 110 *Abell cluster properties (from table4)
radio.dat 220 166 *Abell cluster radio sources (from table4)
optical.dat 87 178 *Optical identifications of the radio sources
refs.dat 106 79 References
notes.dat 95 37 Notes on clusters
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Note on cluster.dat, radio.dat and optical.dat: the 3 files are the data
contained in table4 "Radio sources and X-ray data of Abell clusters (D≤3)".
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See also:
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
J/ApJS/80/501 : VLA survey of Abell clusters. II. (Owen+ 1992)
J/AJ/109/853 : VLA survey of Abell clusters. IV. (Ledlow+ 1995)
J/AJ/110/1959 : VLA survey of Abell clusters. V. (Ledlow+ 1995)
Byte-by-byte Description of file: cluster.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [A]
2- 5 I4 --- Abell Abell (Cat. VII/110) Cluster Number
7- 8 I2 h RAh Right ascension (1950)
10- 13 F4.1 min RAm Right ascension (1950)
15 A1 --- DE- Declination sign (1950)
16- 17 I2 deg DEd Declination (1950)
19- 20 I2 arcmin DEm Declination (1950)
22- 25 F4.1 mag m10 Magnitude of the tenth-brightness galaxy
27 I1 --- Class [0/2] Richness classification
29- 33 F5.4 --- z ? Redshift
35- 45 A11 ---- BM Bautz-Morgan type
47- 50 A4 --- RS Rood-Sastry (1971PASP...83..313R 1971PASP...83..313R) type
52- 54 I3 --- NA Number of galaxies in the cluster
56- 89 A34 --- MT Hubble morphological type
91 A1 --- l_LX Limit flag on LX
92- 99 E8.3 10-7W LX ? X-ray luminosity
100 A1 --- n_LX [abwW] Note on LX (1)
103 A1 --- l_RX Limit flag on RX
104-107 F4.3 Mpc RX ? Core radius of the X-ray region
(lower limit if interval)
108 A1 --- n_RX [-] -: when interval
109-111 F3.2 Mpc RX2 ? Upper limit of RX when interval
113 A1 --- l_No Limit flag on No
114-120 E7.2 cm-3 No ? Central gas density
122 A1 --- l_Mx Limit flag on Mx
123-129 E7.1 solMass Mx ? Intracluster mass
132-139 E8.2 yr tc ? Cluster cooling time
141-148 E8.1 yr e_tc ? rms uncertainty on tc
150 A1 --- l_LeX [≲] Limit flag on LeX
151-154 F4.1 % LeX ? Central X-ray luminosity excess
155 A1 --- n_LeX [-] -: when interval
156-157 I2 % LeX2 ? Upper limit of LeX when interval
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Note (1): the symbols have the following meaning:
w = within 0.67Mpc
W = weak, within 0.33Mpc
a = within 0.33Mpc
b = within 0.67Mpc of center
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Byte-by-byte Description of file: radio.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [A]
2- 5 I4 --- Abell Abell (Cat. VII/110) Cluster Number
7 I1 --- Nr Radiosource number in the cluster (1)
9- 15 F7.1 mJy S20cm Radiosource flux density at 1.5GHz (20cm)
17- 31 A15 --- MType Radiosource morphological type (2)
33 A1 --- l_Size Limit flag on size
34- 38 F5.1 arcsec Size ? Largest angular size of the radiosource
40- 41 I2 h RAh Right ascension (1950)
43- 44 I2 min RAm Right ascension (1950)
46- 50 F5.2 s RAs Right ascension (1950)
52 A1 --- DE- Declination sign (1950)
53- 54 I2 deg DEd Declination (1950)
56- 57 I2 arcmin DEm Declination (1950)
59- 63 F5.2 arcsec DEs Declination (1950)
65- 69 F5.3 --- D Ratio of the separation between the radio
source and the cluster center to the
Abell cluster radius
70 A1 --- n_D [*] *: the radiosource is outside 0.5 of the
Abell cluster radius
72- 79 E8.2 W/Hz P20cm Radio power at 1.5GHz (20cm)
81-107 A27 --- Names Other names
108-127 A20 --- Ref Comma-separated list of reference numbers
detailed in file "refs.dat"
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Note (1): [ZBO89] ACO NNNN-N in Simbad
Note (2): Abbreviations used:
CP: compact
NAT: narrow-angle tailed
WAT: wide-angle tailed
DB: double source
UNK: unknown
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Byte-by-byte Description of file: optical.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [A]
2- 5 I4 --- Abell Abell (Cat. VII/110) Cluster Number
7 I1 --- Nr Radiosource number in the cluster
9- 14 F6.5 --- z ? Redshift of optically identified galaxy
16- 17 I2 h RAh Right ascension (1950)
19- 20 I2 min RAm Right ascension (1950)
22- 26 F5.2 s RAs Right ascension (1950)
28 A1 --- DE- Declination sign (1950)
29- 30 I2 deg DEd Declination (1950)
32- 33 I2 arcmin DEm Declination (1950)
35- 39 F5.2 arcsec DEs Declination (1950)
41 A1 --- l_mag Limit flag on mag
42- 45 F4.1 mag mag ? Visual or photographic magnitude of the
galaxy
46 A1 --- n_mag [bvp] Type of magnitude:
v: V magnitude
p: photographic magnitude
b: b magnitude
48- 69 A22 --- MType Morphological type of the optically
identified galaxy
71- 87 A17 --- Note Note
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 44 A21 --- Author Author names
46-106 A61 --- Com Comments
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [A]
2- 5 I4 --- Abell Abell (Cat. VII/110) Cluster Number
7- 97 A91 --- Note Text of the note
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History: Prepared via OCR at CDS; proof-read and corrected by H. Andernach
() on 5-Nov-2004.
References:
Owen et al., Paper II. 1992ApJS...80..501O 1992ApJS...80..501O, Cat. J/ApJS/80/501
Owen et al., Paper III. 1993ApJS...87..135O 1993ApJS...87..135O
Ledlow et al., Paper IV. 1995AJ....109..853L 1995AJ....109..853L, Cat. J/AJ/109/853
Ledlow et al., Paper V. 1995AJ....110.1959L 1995AJ....110.1959L, Cat. J/AJ/110/1959
Owen & Ledlow, Paper VII. 1997ApJS..108...41O 1997ApJS..108...41O
(End) James Marcout, Patricia Vannier [CDS] (Jan-1999) H. Andernach 05-Nov-2004