J/ApJ/464/79 CFRS XI: High-redshift field galaxies morphology (Schade+ 1996)
Canada-France Redshift Survey. XI. Morphology of high-redshift field galaxies
from high-resolution ground-based imaging
Schade D., Lilly S.J., Le Fevre O., Hammer H., Crampton D.
<Astrophys. J. 464, 79 (1996)>
=1996ApJ...464...79S 1996ApJ...464...79S
ADC_Keywords: Galaxies, photometry ; Redshifts ; Morphology
Keywords: galaxies: distances and redshifts - galaxies: evolution -
galaxies: photometry
Abstract:
The 143 galaxies with secure redshifts (Zmedian=0.62) from the
1415+52 field of the Canada-France Redshift Survey have been imaged
with median seeing of 0.67" (FWHM). Structural parameters have been
derived by fitting multicomponent models and the results confirm two
phenomena seen in a smaller sample of galaxies imaged with the Hubble
Space Telescope. First, 11±3% of the galaxies lie off the normal
locus of color versus bulge fraction B/T. This class of objects ("blue
nucleated galaxies," or BNGs) was identified using HST observations
(Schade et al. 1995ApJ...451L...1S 1995ApJ...451L...1S, hereafter CFRS IX), and it was
shown that they are associated with peculiar/asymmetric structure and
merger/interactions. The observed frequency of BNGs in this sample is
14±4% 0.5<z<1.2 and 6+6-3% at 0.2<z<0.5, but the true frequency
is likely to be a factor ∼2 higher after corrections are made for the
effect of asymmetric/peculiar structures. Galaxy disks at 0.5<z<1.1
are found to have a mean rest-frame, inclination-corrected central
surface brightness of µAB(B)=19.8±0.1mag/arcsec2, ∼1.6mag
brighter than the Freeman (1970ApJ...160..811F 1970ApJ...160..811F) value. At low redshift
(0.2<z<0.5) the mean surface brightness [µAB(B)=21.3±0.25] is
consistent with the Freeman value. These results are consistent with
the HST observations. With larger numbers of galaxies and therefore
more statistical weight they demonstrate the capabilities, and limits,
of ground-based work in the study of galaxy morphology at high
redshift.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 47 143 Canada-France Redshift Survey Galaxies at z>0.5
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See also:
J/ApJ/455/60 : CFRS II: 0000-00 and 1000+25 fields (Le Fevre+ 1995)
J/ApJ/455/75 : CFRS III: 1415+52 and 2215+00 fields (Lilly+ 1995)
J/ApJ/455/88 : CFRS IV: 0300+00 field (Hammer+ 1995)
J/ApJ/481/49 : CFRS XIV. Field galaxies up to z=1 (Hammer+ 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- CFRS Canada-France Redshift Survey designation
9- 13 F5.3 --- z Redshift
15- 19 F5.2 mag Imag IAB magnitude (1)
21- 24 F4.2 mag V-I (V-I)AB colour index
26- 31 F6.2 mag MBmag Absolute BAB magnitude (2)
33- 37 F5.2 mag U-V (U-V)AB colour magnitude
39- 42 F4.2 --- B/T Colour versus bulge fraction
44- 47 F4.2 kpc h ? Scale length
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Note (1): Magnitude is quoted whit the AB normalization scheme (Oke,
1974ApJS...27...21O 1974ApJS...27...21O)
Note (2): Absolute magnitudes assume H0=50km/s/Mpc, q0=0.5
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History: Prepared via OCR at CDS.
References:
Lilly S.J. et al., Paper I. =1995ApJ...455...50L 1995ApJ...455...50L
Le Fevre O. et al.. Paper II. =1995ApJ...455...60L 1995ApJ...455...60L, Cat. J/ApJ/455/60
Lilly S.J. et al., Paper III. =1995ApJ...455...75L 1995ApJ...455...75L, Cat. J/ApJ/455/75
Hammer F. et al., Paper IV. =1995ApJ...455...88H 1995ApJ...455...88H, Cat. J/ApJ/455/88
Crampton D. et al., Paper V. =1995ApJ...455...96C 1995ApJ...455...96C
Lilly S. J. et al., Paper VI. =1995ApJ...455..108L 1995ApJ...455..108L
Hammer F. et al., Paper VII. =1995MNRAS.276.1085H 1995MNRAS.276.1085H
Le Fevre O. et al., Paper VIII. =1996ApJ...461..534L 1996ApJ...461..534L
Schade D. et al., Paper IX. =1995ApJ...451L...1S 1995ApJ...451L...1S
Schade D. et al., Paper X. =1996MNRAS.278...95S 1996MNRAS.278...95S
Tresse L. et al., Paper XII. =1996MNRAS.281..847T 1996MNRAS.281..847T
Le Fevre et al., Paper XIII. =1996BCFHT..34...10L 1996BCFHT..34...10L
Hammer et al., Paper XIV. =1997ApJ...481...49H 1997ApJ...481...49H, Cat. J/APJ/481/49
(End) James Marcout, Patricia Bauer [CDS] 27-Mar-1997