J/A+A/527/A143 RX J105453.3+552102 cluster SDSS photometry (Aguerri+, 2011)
Fossil groups origins.
I. RX J105453.3+552102 a very massive and relaxed system at z∼0.5.
Aguerri J.A.L., Girardi M., Boschin W., Barrena R., Mendez-Abreu J.,
Sanchez-Janssen R., Borgani S., Castro-Rodriguez N., Corsini E.M.,
Del Burgo C., D'Onghia E., Iglesias-Paramo J., Napolitano N., Vilchez J.M.
<Astron. Astrophys., 527, A143 (2011)>
=2011A&A...527A.143A 2011A&A...527A.143A
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Photometry, SDSS
Keywords: galaxies: clusters: individual: RX J105453.3+552102 -
galaxies: groups: general - galaxies: kinematics and dynamics -
galaxies: luminosity function, mass function -
galaxies: elliptical and lenticular, cD - galaxies: evolution
Abstract:
The most accepted scenario for the origin of fossil groups is that
they are galaxy associations in which the merging rate was fast and
efficient. These systems have assembled half of their mass at early
epoch of the Universe, subsequently growing by minor mergers, and
therefore could contain a fossil record of the galaxy structure
formation.
We have started an observational project in order to characterize a
large sample of fossil groups. In this paper we present the analysis
of the fossil system RX J105453.3+552102.
Description:
Optical imaging of RX J105453.3+552102 was carried out at the 2.5m NOT
telescope in March 2008. Optical deep images were used for studying
the properties of the brightest group galaxy and for computing the
photometric luminosity function of the group. We have also performed a
detail dynamical analysis of the system based on redshift data for 116
galaxies. Combining galaxy velocities and positions we selected 78
group members.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 81 116 Photometric and kinematic properties of the
galaxies observed with DOLORES
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See also:
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SDSS]
6- 24 A19 --- SDSS SDSS name (JHHMMSS.ss+DDMMSS.s)
26- 31 I6 km/s cz Line-of-sight velocity
33- 35 I3 km/s e_cz rms uncertainty on cz
37 I1 --- Memb [0/1] Member code (1=cluster member)
39- 40 A2 --- n_cz [E NE] redshift from emission lines (2)
42- 46 F5.2 mag rmag1 ? This paper SExtractor r band magnitude (1)
48- 53 F6.3 mag umag SDSS u magnitude
55- 60 F6.3 mag gmag SDSS g magnitude
62- 67 F6.3 mag rmag SDSS r magnitude
69- 74 F6.3 mag imag SDSS i magnitude
76- 81 F6.3 mag zmag SDSS z magnitude
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Note (1): The error of this magnitude is in the range 0.08-0.10mag
for all objects.
Note (2): Comments as follows:
E = redshift measured using emission lines
NE = galaxies with no evidence of obvious emission lines
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 10-Aug-2011