J/A+A/468/937 K-band AO imaging in COSMOS deep field (Huertas-Company+, 2007)
Morphological evolution of z∼1 galaxies from deep K-band AO imaging in the
COSMOS deep field.
Huertas-Company M., Rouan D., Soucail G., Le Fevre O., Tasca L., Contini T.
<Astron. Astrophys., 468, 937-950 (2007)>
=2007A&A...468..937H 2007A&A...468..937H
ADC_Keywords: Galaxies, photometry ; Morphology
Keywords: galaxies: fundamental parameters - galaxies: high-redshift -
galaxies: evolution - instrumentation: adaptive optics
Abstract:
We present the results of an imaging program of distant galaxies
(z∼0.8) at high spatial resolution (∼0.1") aiming at studying their
morphological evolution. We observed 7 fields of 1'x1' with the NACO
Adaptive Optics system (VLT) in Ks (2.16µm) band with typical V∼14
guide stars and 3h integration time per field. Observed fields are
selected within the COSMOS survey area, in which multi-wavelength
photometric and spectroscopic observations are ongoing. High
angular-resolution K-band data have the advantage of probing old
stellar populations in the rest-frame, enabling a determination of
galaxy morphological types unaffected by recent star formation, which
are more closely linked to the underlying mass than classical optical
morphology studies (HST). Adaptive optics on ground based telescopes
is the only method today for obtaining such a high resolution in the
K-band, but it suffers from limitations since only small fields are
observable and long integration times are necessary.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table6.dat 80 79 Summary of the morphological classifications for
the 79 detected objects
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [NHzG]
6- 21 A16 --- NHzG NHzG designation (JHHMMSS.s+DDMMSS)
23- 29 F7.3 deg RAdeg Right ascension in decimal degrees (J2000)
31- 37 F7.5 deg DEdeg Declination in decimal degrees (J2000)
39- 45 F7.4 mag Ksmag Ks-band magnitude
47- 53 F7.4 mag Imag I-band magnitude
55- 62 F8.6 arcsec rh Radius
64- 70 F7.4 --- zphot ?=99.9999 Photometric redshift
72- 73 A2 --- G2D(K) Estimated morphological type from AO imaging
in the K-band with GIM2D (1)
75- 76 A2 --- C-A(K) Estimated morphological type from AO imaging
in the K-band with C-A (1)
78- 80 A3 --- C-A(I) Estimated morphological type from HST-ACS in
the I-band (1)
--------------------------------------------------------------------------------
Note (1): Morphological types as follows:
BD = bulge-dominated
DD = disk-dominated
I = irregular
N/A = not analysed
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 03-Jul-2007