J/A+A/393/439 Catalogue of galaxies towards Abell 496 (Durret+, 2002)
Environmental effects on the galaxy luminosity function in
the cluster of galaxies Abell 496.
Durret F., Adami C., Lobo C.
<Astron. Astrophys. 393, 439 (2002)>
=2002A&A...393..439D 2002A&A...393..439D
ADC_Keywords: Clusters, galaxy ; Magnitudes
Keywords: clusters: individual (Abell 496) - galaxies: luminosity function
Abstract:
We have derived the galaxy luminosity function (GLF) in the cluster of
galaxies Abell 496 from a wide field image in the I band. A single
Schechter function reproduces quite well the GLF in the 17≤IAB≤22
(-19.5≤MI≤eq-14.5) magnitude interval, and the power law index of
this function is found to be somewhat steeper in the outer regions
than in the inner regions. This result agrees with the idea that faint
galaxies are more abundant in the outer regions of clusters, while in
the denser inner regions they have partly been accreted by larger
galaxies or have been dimmed or even disrupted by tidal interactions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 114 37058 Catalogue of galaxies in the direction of the
cluster Abell 496
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See also:
J/A+AS/139/525 : Abell 496 heliocentric velocities (Durret+, 1999)
J/A+AS/139/559 : Abell 496 photometric catalogue (Slezak+, 1999)
Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Running number
7- 16 F10.7 deg RAdeg Right ascension in degrees (equinox J2000.0)
18- 28 F11.7 deg DEdeg Declination in degrees (equinox J2000.0)
30- 36 F7.3 arcsec aaxis Semi major axis (A_IMAGE from SExtractor,
multiplied by pixel size)
38- 43 F6.1 deg PA [-180/0] Major axis position angle
(anticlockwise from north)
45- 49 F5.3 --- Ell Ellipticity (defined as 1-b/a)
51- 55 F5.2 mag Imagauto ?=99.00 Total Kron elliptical magnitude
(MAG_AUTO) from SExtractor, calculated with
an adaptive aperture) in I band
57- 61 F5.2 mag e_Imagauto ?=99.00 Error on the total Kron magnitude
63- 67 F5.2 mag Amag15 ?=99.00 Aperture magnitude within a diameter
of 15 pixels (3.09 arcsec) in I band
69- 73 F5.2 mag e_Amag15 ?=99.00 Error on Amag15
75- 79 F5.2 mag Amag10 ?=99.00 Aperture magnitude within a diameter
of 10 pixels (2.06 arcsec) in I band
81- 85 F5.2 mag e_Amag10 ?=99.00 Error on Amag10
87- 91 F5.2 mag Amag5 ?=99.00 Aperture magnitude within a diameter
of 5 pixels (1.03 arcsec) in I band
93- 97 F5.2 mag e_Amag5 ?=99.00 Error on Amag5
99-103 F5.2 mag Amag3.64 ?=99.00 Aperture magnitude within a diameter
of 3.64 pixels (0.75 arcsec, the
seeing of our image) in I band
105-109 F5.2 mag e_Amag3.64 ?=99.00 Error on Amag3.64
112-114 I3 --- SDG99 ?Number in table2 of 1999A&AS..139..559S 1999A&AS..139..559S
(Slezak et al., Cat. J/A+AS/139/559)
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Acknowledgements: Florence Durret
History:
* 02-Jan-2003: the cross-identification SDG99 was supplied by Florence
Durret to Francoise Genova and added to the catalog.
(End) Patricia Bauer [CDS] 26-Sep-2002