J/A+A/578/A79 Galaxy clusters in SDSS Stripe 82 (Durret+, 2015)
Galaxy clusters in the SDSS Stripe 82 based on galaxy photometric redshifts.
Durret F., Adami C., Bertin E., Hao J., Marquez I., Martinet N.,
Maurogordato S., Sauvaget T., Scepi N., Takey A., Ulmer M.P.
<Astron. Astrophys. 578, A79 (2015)>
=2015A&A...578A..79D 2015A&A...578A..79D
ADC_Keywords: Clusters, galaxy ; Redshifts
Keywords: surveys - galaxies: clusters: general -
cosmology: large-scale structure of Universe
Abstract:
The discovery of new galaxy clusters is important for two reasons.
First, clusters are interesting per se, since their detailed analysis
allows us to understand how galaxies form and evolve in various
environments and second, they play an important part in cosmology
because their number as a function of redshift gives constraints on
cosmological parameters.
We have searched for galaxy clusters in the Stripe 82 region of the
Sloan Digital Sky Survey, and analysed various properties of the
cluster galaxies.
Based on a recent photometric redshift (hereafter photo-z) galaxy
catalogue, we built a cluster catalogue by applying the Adami & MAzure
Cluster FInder (AMACFI). Extensive tests were made to fine-tune the
AMACFI parameters and make the cluster detection as reliable as
possible. The same method was applied to the Millennium simulation to
estimate our detection efficiency and the approximate masses of the
detected clusters. Considering all the cluster galaxies (i.e. within a
1Mpc radius of the cluster to which they belong and with a photo-z
differing by less than ±0.05 from that of the cluster), we stacked
clusters in various redshift bins to derive colour-magnitude
diagrams and galaxy luminosity functions (GLFs). For each galaxy
brighter than Mr←19.0, we computed the disk and spheroid
components by applying SExtractor, and by stacking clusters we
determined how the disk-to-spheroid flux ratio varies with cluster
redshift and mass.
Description:
Table A1 (in the Appendix) is a catalogue of clusters of galaxies
detected in the Stripe 82 region of the Sloan Digital Sky Survey, in
order of increasing right ascension.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 37 3663 Catalogue of clusters of galaxies detected in
the Stripe 82 region of SDSS
--------------------------------------------------------------------------------
See also:
J/MNRAS/413/3059 : 4098 galaxy clusters in SDSS Stripe 82 (Geach+, 2011)
J/other/RAA/11.309 : Nearby early-type galaxies in Stripe 82 (Jiang+, 2011)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Seq [1/3663] Cluster number
6- 15 F10.6 deg RAdeg Right ascension (J2000.0)
18- 26 F9.6 deg DEdeg Declination (J2000.0)
28- 31 F4.2 --- z [0.15/0.7] Cluster photometric redshift
33 I1 --- Nsig [3/9] Cluster detection level (in σ's)
35- 37 I3 --- Ngal [11/102] Number of galaxies within a radius of
1Mpc of the cluster centre and with a photometric
redshift differing by less than 0.04(1+z) from
the cluster redshift
--------------------------------------------------------------------------------
Acknowledgements:
Florence Durret, durret(at)iap.fr
(End) Patricia Vannier [CDS] 23-Mar-2015