J/A+A/487/453 Bright galaxies in 5 medium redshift clusters. I. (Ascaso+, 2008)
The bright galaxy population of five medium redshift clusters.
I. Color-magnitude relation, blue fractions, and visual morphology.
Ascaso B., Moles M., Aguerri J.A.L., Sanchez-Janssen R., Varela J.
<Astron. Astrophys., 487, 453-460 (2008)>
=2008A&A...487..453A 2008A&A...487..453A
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Redshifts
Keywords: cosmology: observations - galaxies: clusters: general -
galaxies: fundamental parameters
Abstract:
Using data from five clusters of galaxies within the redshift range
0.15≤z≤0.25, imaged with the Nordic Optical Telescope (NOT) in the
central ∼1Mpc2 in very good seeing conditions, we have performed an
exhaustive inspection of their bright galaxy population. That range of
redshift, where only a small amount of data with the required
resolution and quality is available, is particularly important for the
understanding of the formation and evolution of clusters of galaxies.
We have inspected the color-magnitude relation (CMR) for those
clusters and measured the blue fraction of galaxies in their cores to
check for evidence of evolution as found in other works. Visual
classification of the galaxy morphology has been performed and the
morphology-radius relation examined.
Description:
Two of us (M.M. and J.A.L.A.) imaged five galaxy clusters with the
2.5m Nordic Optical Telescope (NOT) located at the Roque de Los
Muchachos Observatory (La Palma). The observations were taken with
the Stand Camera, with a field of view of 3'x3', a plate scale of
0.176"/pix, a gain of 1.69e-/ADU and a readout noise of 6.36e-.
All images were taken under photometric sky conditions and very good
seeing (between 0.5" and 0.8"). The clusters were observed through two
broad-band filters: Gunn-r' (r) and Bessel B (B).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 54 408 Catalogue of galaxies detected in the cluster sample
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See also:
J/A+A/506/1071 : Galaxy morphology in 5 medium redshift clusters (Ascaso+ 2009)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Cluster Cluster Abell name (ANNNN) (1)
7- 8 I2 h RAh Galaxy right ascension (J2000) (2)
10- 11 I2 min RAm Galaxy right ascension (J2000) (2)
13- 17 F5.2 s RAs Galaxy right ascension (J2000) (2)
19 A1 --- DE- Galaxy declination sign (J2000) (2)
20- 21 I2 deg DEd Galaxy declination (J2000) (2)
23- 24 I2 arcmin DEm Galaxy declination (J2000) (2)
26- 29 F4.1 arcsec DEs Galaxy declination (J2000) (2)
30 A1 --- --- [0]
32- 37 F6.4 --- z ? Redshift, when available
39- 44 F6.2 mag rMAG Absolute Gunn r' magnitude
46- 51 F6.2 mag BMAG Absolute Bessel B magnitude
53- 54 A2 --- MType Morphological type
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Note (1): The five clusters are A1643, A1878, A1952, A2111 and A2658.
Note (2): Galaxies identified in Simbad as
<[AMA2008] ANNNN JHHMMSS.ss+DDMMSS.ss>
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History:
From electronic version of the journal
References:
Ascaso et al., Paper II 2009A&A...506.1071A 2009A&A...506.1071A, Cat. J/A+A/506/1071
(End) Patricia Vannier [CDS] 11-Sep-2010