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J/ApJ/497/188 A103, A118 and A114 morphological studies (Couch+ 1998)
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Morphological studies of the galaxy populations in distant ``Butcher-Oemler''
clusters with the Hubble Space Telescope.
II. AC 103, AC 118, and AC 114 at z = 0.31.
Couch W.J., Barger A.J., Smail I., Ellis R.S., Sharples R.M.
<Astrophys. J. 497, 188 (1998)>
=1998ApJ...497..188C (SIMBAD/NED BibCode)
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ADC_Keywords: Clusters, galaxy ; Photometry ; Equivalent widths ; Morphology
Mission_Name: HST
Keywords: galaxies: clusters: individual (AC 103, AC 114, AC 118) -
galaxies: evolution - galaxies: interactions - galaxies: structure
Abstract:
We present the results of a program to study the detailed morphologies
of galaxies in intermediate-redshift clusters and hence understand the
physical origin of the enhanced star formation seen in the
environments at earlier epochs. Deep, high-resolution imagery has been
obtained of three rich clusters, AC 103, AC 118 and AC 114 at z=0.31,
through the R (F702W) filter of the Wide Field Planetary Camera
(WFPC2) of the Hubble Space Telescope (HST).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 110 131 New spectroscopic results
table4.dat 97 738 Morphological classifications for AC 103,
AC 118, and AC 114
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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- 6 A6 --- Cluster Cluster name
9- 11 A3 --- Tel Telescope (1)
13- 18 A6 --- Inst Instrument (2)
20- 25 A6 --- HST HST number (3)
28- 30 I3 --- CN84 ? Couch & Newell (1984ApJS...56..143C) number
31 A1 --- m_CN84 Multiplicity index on CN84
33- 35 I3 --- BAE96 ? Barger et al. (1996MNRAS.279....1B) number
37- 38 I2 h RAh Right ascension (1950)
40- 41 I2 min RAm Right ascension (1950)
43- 46 F4.1 s RAs Right ascension (1950)
48 A1 --- DE- Declination sign
49- 50 I2 deg DEd Declination (1950)
52- 53 I2 arcmin DEm Declination (1950)
55- 58 F4.1 arcsec DEs Declination (1950)
60- 64 F5.2 mag Rmag ? R magnitude
66- 70 F5.2 mag K'mag ? K' magnitude
72- 75 F4.2 mag B-R B-R (or U-i if n_B-R=a) colour index
76 A1 --- n_B-R [a] a: U-I colour index from BAE96
in B-R column
78- 83 F6.4 --- z Redshift
84 A1 --- u_z Uncertainty flag on z (4)
86- 89 F4.1 0.1nm EW(3727) ? Equivalent width of [O II] {lambda}3727
emission line
91- 93 F3.1 0.1nm e_EW(3727) ? rms uncertainty on EW(3727)
95- 97 F3.1 0.1nm EW(Hd) ? Equivalent width of H{delta} absorption line
99-101 F3.1 0.1nm e_EW(Hd) ? rms uncertainty on EW(Hd)
103-110 A8 --- SpType Spectral type (5)
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Note (1): AAT: Anglo-Austalian Telescope
NTT: New Technology Telescope
Note (2): LDSS-1: Low Dispersion Survey Spectrograph on AAT
EMMI: European Multi-Mode Imager/Spectrograph on NTT
Note (3): Identity number of each object in SExtractor catalog derived from our
WFPC2 images.
The absence of entry indicates that the object lies outside the
WFPC2 field.
Note (4): The presence of a colon denotes that the measurement is based on just
one line emission, assumed in all cases to be [O II] {lambda}3727.
Note (5): Psv(pec): galaxies whose spectra have all the same characteristics
as the passive types but whose colors are marginally bluer.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Cluster Cluster name
8- 15 A8 --- HST HST number
17- 19 I3 --- CN84 ? Couch & Newell (1984ApJS...56..143C) number
20 A1 --- m_CN84 Multiplicity index on CN84
22- 27 F6.1 pix xpos X coordinate from HST
29- 34 F6.1 pix ypos Y coordinate from HST
36- 41 F6.3 mag R702 R (F702W filter) magnitude
43- 50 A8 --- Mtype Hubble type
52- 53 I2 --- MDS Classifications on the numerical scheme devised
by Glazebrook et al. (1995MNRAS.275...19G) (1)
55- 63 A9 --- Status Int/Merg/Sat (2)
64- 97 A34 --- Com Comments
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Note (1): 0= E
1= E/S0
2= S0
3= Sa-Sb
4= S
5= Sc-Sdm
6= Irr
7= unclassified object
8= galaxy merger
-1= same "compact" morphology as found here
Note (2): I or i: interactive
M or m: merger
T or t: tidal evidence
Sat: galaxies with faint satellites
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History: From the ApJ electronic version
References:
Couch et al., Paper I. 1994ApJ...430..121C
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(End) James Marcout, Patricia Bauer [CDS] 22-Jun-1998