J/A+A/337/17 Redshift survey between A548 and A3367 (Andreuzzi+, 1998)
A redshift survey between the clusters of galaxies A 548 and A 3367.
Andreuzzi G., Bardelli S., Scaramella R., Zucca E.
<Astron. Astrophys. 337, 17 (1998)>
=1998A&A...337...17A 1998A&A...337...17A
ADC_Keywords: Clusters, galaxy ; Redshifts
Keywords: galaxies: clusters: individual: A 548; A 3367 -
galaxies: clusters: general - galaxies: distances and redshifts
Abstract:
In this paper we present the results of a spectroscopic survey of
galaxies in an area between the two clusters of galaxies A548 and
A3367, suspected to be a close and interacting pair. With the use of
multifiber spectroscopy, we measured 180 new velocities of galaxies in
the central part of A 3367 and in the external regions of A 548. The
redshift histogram shows the presence of three velocity peaks, at
v∼12000km/s, v∼30000km/s and v∼40000km/s, respectively. For these we
estimate the density excess, the mean velocity, and the velocity
dispersion. The first clump corresponds to an elongation of A 548: in
particular we found a correspondence between the features of this peak
and the substructures of A 548. The second peak has a velocity
dispersion which is typical of clusters and the distribution of its
members on the plane of the sky corresponds to the highest density
peak in A 3367. We therefore suggest that the name A 3367 has to be
attributed to this clump. Our general conclusion is that, differently
from expected, A 548 and A 3367 do not form a close pair of merging
clusters, since the two structures are at significantly different
redshifts. Moreover, we found that the complex dynamical structure of
A 548 has large coherence, with a projected extension in the range of
1-3h-1Mpc.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tables.dat 58 180 Velocities (tables 2 to 7)
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Byte-by-byte Description of file: tables.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Field Field designation (1)
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 15 F4.1 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 32 F4.1 mag bJ bJ magnitude
34- 38 I5 km/s HVabs ? Absorption line heliocentric velocity
40- 42 I3 km/s e_HVabs ? rms uncertainty on HVabs
44- 49 I6 km/s HVem ? Emission line heliocentric velocity
51- 53 I3 km/s e_HVem ? rms uncertainty on HVemi
55- 58 A4 --- Note [abcd ] Presence of emission lines (2)
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Note (1):
* F51a, F51b (F51 centered at 05:49:24-24:35:00 (J2000),
* F52 (centered at 05:49:00-25:00:00 (J2000),
* F53 (centered at 05:49:24-24:10:00 (J2000),
* F61 (centered at 05:50:46-25:09:47 (J2000),
* F62 (centered at 05:50:46-24:39:52 (J2000)
Note (2): the symbols are:
a = [OII]λ3727Å
b = [Oβ]λ4861Å
c = [OIII]λ4959Å
d = [OIII]λ5007Å
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History: Prepared via OCR at CDS.
* 13-Jun-2003: One error communicated by H. Andernach (record#69)
(End) James Marcout, Patricia Bauer [CDS] 28-May-1999