Access to Astronomical Catalogues

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
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:

       FileName      Lrecl  Records   Explanations

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         97       37   Notes on clusters

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)".


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

   Bytes Format Units     Label    Explanations

       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) 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

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


Byte-by-byte Description of file: radio.dat

   Bytes Format Units    Label    Explanations

       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"

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


Byte-by-byte Description of file: optical.dat

   Bytes Format Units   Label     Explanations

       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


Byte-by-byte Description of file: refs.dat

   Bytes Format Units   Label     Explanations

   1-  2  I2    ---     Ref       Reference number
   4- 22  A19   ---     BibCode   BibCode
  24- 44  A21   ---     Author    Author names
  46-106  A61   ---     Com       Comments


Byte-by-byte Description of file: notes.dat

   Bytes Format Units   Label     Explanations

       1  A1    ---     ---       [A]
   2-  5  I4    ---     Abell     Abell (Cat. VII/110) Cluster Number
   7- 97  A91   ---     Note      Text of the note


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, Cat. J/ApJS/80/501
    Owen et al.,   Paper III.  1993ApJS...87..135O
    Ledlow et al., Paper IV.   1995AJ....109..853L, Cat. J/AJ/109/853
    Ledlow et al., Paper V.    1995AJ....110.1959L, Cat. J/AJ/110/1959
    Owen & Ledlow, Paper VII.  1997ApJS..108...41O
(End) James Marcout, Patricia Vannier [CDS] (Jan-1999) H. Andernach  05-Nov-2004