J/A+A/495/15 A959 galaxies r' magnitude and radial velocities (Boschin+, 2009)
Internal dynamics of the galaxy cluster Abell 959.
Boschin W., Barrena R., Girardi M.
<Astron. Astrophys., 495, 15-26 (2009)>
=2009A&A...495...15B 2009A&A...495...15B
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Radial velocities
Keywords: galaxies: clusters: individual: Abell 959 -
galaxies: clusters: general - galaxies: distances and redshifts
Abstract:
The connection of cluster mergers with the presence of extended,
diffuse radio sources in galaxy clusters is still being debated.
We aim to obtain new insights into the internal dynamics of Abell 959,
showing evidence of a diffuse radio source, analyzing velocities and
positions of member galaxies.
Our analysis is based on redshift data for 107 galaxies in the cluster
field acquired at the Telescopio Nazionale Galileo. We also use
photometric data from the Sloan Digital Sky Survey (Data Release 6).
We combine galaxy velocities and positions to select 81 galaxies
recognized as cluster members and determine global dynamical
properties. We analyze the cluster searching for substructures by
using the weighted gap analysis, the KMM method and the
Dressler-Shectman statistics. We also study the 2D galaxy distribution
in the field of the cluster. We compare our results with those from
X-ray and gravitational lensing analyses.
Description:
Multi-object spectroscopic observations of A959 were carried out at
the TNG telescope in December 2006. We used DOLORES/MOS with the LR-B
Grism 1.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 46 107 Velocity catalog of 107 spectroscopically
measured galaxies in the field of A959
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See also:
II/282 : The SDSS Photometric Catalog, Release 6 (Adelman-McCarthy+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [BBG2009] Sequential number
4 A1 --- n_[BBG2009] [*g] Note on [BBG2009] (1)
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 16 F5.2 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign (J2000)
19- 20 I2 deg DEd Declination (J2000)
22- 23 I2 arcmin DEm Declination (J2000)
25- 28 F4.1 arcsec DEs Declination (J2000)
30- 34 F5.2 mag r'mag r' magnitude
35 A1 --- n_r'mag [b] Inconsistency with SDSS (2)
37- 42 I6 km/s RV Radial velocity
44- 46 I3 km/s e_RV rms uncertainty on RV
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Note (1): Note as follows:
* = non-cluster galaxy
g = indicate the first (53) and the second (82) dominant
galaxies of the cluster (I and II; see text)
Note (2): 'b': a visual inspection of the SDSS r image suggests that the
r' magnitude of galaxy ID 69 listed in the SDSS catalog is incorrect,
possibly due to the contamination of a very close galaxy. We recompute
the r' of ID 69 and present our estimate here.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 26-Apr-2009