Access to Astronomical Catalogues

← Click to display the menu
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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 54 408 Catalogue of galaxies detected in the cluster sample
See also: J/A+A/506/1071 : Galaxy morphology in 5 medium redshift clusters (Ascaso+ 2009) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
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
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>
History: From electronic version of the journal References: Ascaso et al., Paper II 2009A&A...506.1071A, Cat. J/A+A/506/1071
(End) Patricia Vannier [CDS] 11-Sep-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact