J/AJ/122/38 BVRI photometry of Abell 2443 (Trujillo+, 2001)
Quantitative morphology of the intermediate-redshift galaxy cluster Abell 2443
from ground-based imaging: evidence for a galaxy concentration index
correlation with cluster density.
Trujillo I., Aguerri J.A.L., Gutierrez C.M., Cepa J.
<Astron. J. 122, 38 (2001)>
=2001AJ....122...38T 2001AJ....122...38T
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Photometry, UBVRI
Keywords: galaxies: distances and redshifts - galaxies: evolution -
galaxies: fundamental parameters - galaxies: photometry
Abstract:
We present broadband photometry and provide a quantitative analysis of
the structure of galaxies in the inner region of the Abell Cluster
2443 (z∼0.1). The galaxy parameters have been derived by fitting a
two-component model (Sersic r1/n bulge and exponential disk) to a
magnitude-limited sample. Using a new method of analysis that takes
into account the effects of seeing on the structural parameters and
considers ellipticity as an active parameter, we avoid systematic
errors arising from assumptions of circular symmetry. Of the sample
galaxies, 76% were classified with these models, while the rest were
morphologically peculiar. For the spiral galaxies, the relation
between n and B/D is consistent with the trend observed in nearby
field galaxy samples. The Sersic index n (which can be considered as a
concentration index) of the elliptical galaxies is correlated with the
local surface density of the cluster. Monte Carlo simulations were
used to check the reliability of the method and determine the
magnitude selection criteria.
Observations were obtained on 1998 August 19 at the 2.5 m Nordic
Optical Telescope (NOT) at the Observatorio del Roque de los Muchachos
on La Palma. The prime-focus CCD camera was used with pixel scale of
0.11"/pix, and the seeing ranged from FWHM 0.88" to 1".
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 52 121 Broadband photometry (Johnson filters)
of the core of Abell 2443
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [TAG2001] Sequential number
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 33 F5.2 mag Bmag Johnson B magnitude
35- 39 F5.2 mag Vmag Johnson V magnitude
41- 45 F5.2 mag Rmag Johnson R magnitude
47- 51 F5.2 mag Imag Johnson I magnitude
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 14-Jan-2002