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J/A+AS/106/1 Radio data in Dumbbell galaxies (Gregorini+, 1994)
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Dumbbell galaxies and multiple nuclei in rich clusters: radio data
Gregorini L., de Ruiter H.R., Parma P., Sadler E.M., Vettolani G.,
Ekers R.D.
<Astron. Astrophys. Suppl. Ser. 106, 1 (1994)>
=1994A&AS..106....1G
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ADC_Keywords: Clusters, galaxy ; Galaxies, radio
Keywords: galaxies: clusters - galaxies: elliptical and lenticular, cD -
radio continuum: galaxies
Abstract:
We present radio observations at 6 cm for 93 ACO clusters, in which the
brightest member consists of either two galaxies of roughly equal
brightness inside a common halo (a dumbbell) or has multiple nuclei. A
subsample of 27 dumbbell systems, belonging to a volume-limited sample, was
observed with the VLA and ATCA. The remaining clusters were mapped with the
VLA. The detection rate in the volume-limited sample is 44%. In all 93
clusters observed 43 brightest cluster members were detected in the radio.
Parameters are presented for all the radio sources detected in the cluster
fields.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4 74 271 Radio sources in the clusters fields
table5 81 172 Radio sources identified with the cluster
brightest member
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Byte-by-byte Description of file: table4 table5
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Bytes Format Units Label Explanations
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1- 6 A6 --- Name Cluster name
8- 9 A2 --- N Reference number of the source; a letter
refers to the different components of the
extended sources
11- 12 I2 h RAh []? Right ascension 1950.0 (1)
14- 15 I2 min RAm []? Right ascension 1950.0 (1)
17- 21 F5.2 s RAs []? Right ascension 1950.0 (1)
23 A1 --- DE- Declination sign
24- 25 I2 deg DEd []? Declination 1950.0 (1)
27- 28 I2 arcmin DEm []? Declination 1950.0 (1)
30- 33 F4.1 arcsec DEs []? Declination 1950.0 (1)
35 A1 --- l_S6cm limit flag on S6cm
36- 42 F7.2 mJy S6cm []? Total flux density at 6 cm (5 GHz) not
corrected for attenuation effects (2)
49- 52 F4.1 arcsec FWHM1 []? Full Width Half Maximun (FWHM) along major
axis of a Gaussian fitting of the source
53 A1 --- x [x] An 'x' indicates two values of FWHM along
major and minor axes
54 A1 --- l_FWHM2 limit flag for second values of FWHM
55- 59 F5.2 arcsec FWHM2 []? FWHM (along minor axis if x in column 53)
61 A1 --- l_PA limit flag on PA
62- 64 I3 deg PA []? Position angle of a Gaussian fitting the
source
66- 68 I3 arcsec LAS []? Largest angular size for complex sources
70- 73 F4.1 arcmin D []? Distance of the source from the
pointing position
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Note (1): in table4, the right ascension and declination refers to
the radio emission peak. See also Note (2) below
Note (2): in table5,
-For non detected radio sources,
the right ascension and declination refers to optical position of
the dominant galaxy
the F value refers to 3 sigma limit for the flux;
-For the detected radio sources,
the right ascension and declination of the first row refers to
optical position of the identified galaxy,
in the following rows, the parameters refers to radio parameters
-For A3432, the high flux 363.5mJy is likely an error
(see "Post-Publication Notes" above)
Remarks:
A367: there is a very faint (2 sigma) radio source right at the
position of the galaxy.
A1791: the radio source is complex, and the galaxy is almost certainly
associated with the source.
A2854: there is little doubt that the dumbbell system and the radio
source are associated, even though the positional coincidence
is difficult to judge, due to the absence of a strong,
well-defined radio core.
A3150: there are three galaxies close to the radio source. This is the
only unclear case in the whole sample. The identification
should be considered uncertain.
A3151: one galaxy falls right inside the double radio source, so the
identification is probably correct.
A3391: the radio source is complex; a faint core is present and lies
close (~5 arcsec) to the eastern galaxy of the dumbbell system,
and we therefore consider the radio source associated with this
galaxy.
A3432: see "Post-Publication Notes"
A3532: similar to the case of A1791: one galaxy is in between the two
lobes of a double source. The identification is quite likely
correct.
A3618: the western galaxy is probably the one associated with the radio
source.
A3706: the radio identification is uncertain due to the very faint
radio source associated.
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Historical Notes:
*02-Mar-1994: first released
*14-Oct-1994: Post-publication:
following a remark by H. Andernach (heinz@adel.univ-lyon1.fr)
on the high value (363.5mJy) of the peak flux of A3432,
L. Gregorini (GREGORINI@astbo1.bo.cnr.it) answered:
"I had no time to directly check on the map (I am teaching), but from my
printed paper I agree with you: the correct value must be a factor of 10
less. Thank you for finding this mistake."
*14-Oct-1994: ReadMe modified
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(End) Patricia Bauer [CDS] 14-Oct-1994