J/AJ/122/621 Galaxy morphology in the CFRS (van den Bergh, 2001)
The evolution of galaxy morphology for galaxies in the
Canada-France Redshift Survey.
van den Bergh S.
<Astron. J. 122, 621 (2001)>
=2001AJ....122..621V 2001AJ....122..621V
ADC_Keywords: Galaxy catalogs ; Surveys ; Redshifts ; Morphology
Keywords: galaxies: evolution - surveys
Abstract:
The images of 229 galaxies in the Canada-France Redshift Survey have
been classified on the DDO system. These observations were combined
with previous classifications of galaxies with known redshifts in the
Hubble Deep Field. The combined sample provides homogeneous
morphological classifications for 425 galaxies of known redshift. The
fraction of all galaxies that are of type E, S0, or E/S0 appears to
remain approximately constant at ∼17% over the redshift range
0.25<z<1.2. Over the same range, the fraction of irregular (Ir)
galaxies increases from ∼5% to ∼12%. Part of this increase may be due
to mild luminosity evolution of Ir galaxies. The frequency of mergers
is found to rise by a factor of 2 or 3 over the redshift range covered
by the present survey. These results are in qualitative agreement with
those obtained previously by Brinchmann et al. (Cat. J/ApJ/499/112)
using a coarser galaxy classification system.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 117 229 Morphological classifications for galaxies that
have been observed spectroscopically
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See also:
VII/225 : Canada-France Redshift Survey catalogue ((Le Fevre+ 1995)
J/ApJ/464/79 : CFRS XI: High-redshift field galaxies morphology (Schade+ 1996)
J/ApJ/481/49 : CFRS XIV. Field galaxies up to z=1 (Hammer+ 1997)
J/ApJ/499/112 : HST CFRS and LDSS redshift surveys. I. (Brinchmann+ 1998)
J/ApJ/517/148 : ISO observations of the CFRS field (Flores+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 F6.4 --- z Redshift
8- 14 F7.4 --- CFRS CFRS number (Cat. VII/225)
15 A1 --- n_CFRS [a] if classified at (or close to)
rest-frame B wavelength.
17- 29 A13 --- Class Morphology classification
31-117 A87 --- Rem Remarks
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 12-Nov-2001