J/ApJ/634/977 Redshifts in Cl 0024+16 members (Moran+, 2005)
A Wide-Field Hubble Space Telescope survey of the cluster Cl 0024+16 at z=0.4.
III. Spectroscopic signatures of environmental evolution in early-type galaxies.
Moran S.M., Ellis R.S., Treu T., Smail I., Dressler A., Coil A.L.,
Smith G.P.
<Astrophys. J., 634, 977-1001 (2005)>
=2005ApJ...634..977M 2005ApJ...634..977M
ADC_Keywords: Clusters, galaxy ; Redshifts
Keywords: galaxies: clusters: individual (Cl 0024+1654) -
galaxies: elliptical and lenticular, cDgalaxies: evolution -
galaxies: formation - galaxies: fundamental parameters -
galaxies: kinematics and dynamics
Abstract:
We report results from a panoramic spectroscopic survey of 955 objects
in the field of the rich cluster Cl 0024+1654 (z∼0.4), complementing
the HST imaging presented in the first paper in this series. Combining
with previous work, we compile a catalog of 1394 unique redshifts in
the field of this cluster (1334 in Table 2), including 486 cluster
members spread across an area 10Mpc in diameter. Our new spectroscopic
sample includes over 200 high-quality spectra of cluster members. We
examine the properties of a large sample of 104 cluster early-type
galaxies as a function of cluster radius and local density, using them
as sensitive tracers of the various physical processes that may be
responsible for galaxy evolution.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 54 104 Observed E+S0 cluster members
table2.dat 48 1334 Cl 0024+1654 redshift catalog
table3.dat 61 104 All measurements of observed E+S0 members
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See also:
J/ApJ/591/53 : I photometry of Cl 0024+16 (Treu+, 2003)
J/A+A/372/391 : Spectroscopic Survey of Cl 0024+1654 (Czoske+, 2001)
J/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Object name (G1)
11- 17 F7.5 deg RAdeg Right Ascension (J2000.0)
19- 26 F8.5 deg DEdeg Declination (J2000.0)
28- 33 F6.4 --- z Redshift
35- 39 F5.2 mag Imag I (F814W) magnitudes (1)
41- 44 F4.2 Mpc R Projected radius of the galaxy
46- 49 I4 Mpc-2 Sigma Local density Σ10 of the galaxy (2)
51- 54 A4 --- MType Morphological type
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Note (1): F814W magnitudes are corrected for Galactic extinction, adopting
E(B-V)=0.057 (Schlegel et al. 1998ApJ...500..525S 1998ApJ...500..525S).
Errors in F814W magnitudes are less than 0.05mag rms.
Note (2): Typical uncertainty in 10 is 25%, equal to the rms variation in the
local density across different measurement methods.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 F8.6 deg RAdeg Right Ascension in decimal degrees (J2000)
10- 18 F9.6 deg DEdeg Declination in decimal degrees (J2000)
20- 26 F7.4 --- z Most reliable redshift
28 I1 --- q_z [0/3] Quality flag on z (1)
30 I1 --- r_z [1/5] Source flag on z (2)
32- 38 F7.4 --- Mean redshift when multiple sources available
40- 46 F7.4 --- e_ The rms difference in
48 I1 --- o_ Number of redshift sources in
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Note (1): Quality flag on z, defined as follows:
0 = Unspecified by source;
1 = Secure;
2 = Probable;
3 = Uncertain.
Note (2): Source flag on z, defined as follows:
1 = Czoske et al. (2001, Cat. J/A+A/372/391);
2 = Frazier Owen (private communication);
3 = Hale/COSMIC;
4 = Keck/LRIS;
5 = Keck/DEIMOS
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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- 9 A9 --- Name Object name (G1)
11- 15 F5.1 0.1nm [OII] Line strength index of [OII]
(Error∼0.1Å) (1)
17- 20 F4.1 0.1nm HdA Line strength index of HδA
(Error∼0.2Å) (1)
22- 25 F4.1 0.1nm HgA ? Line strength index of HγA
(Error∼0.2Å) (1)
27- 29 F3.1 0.1nm Mgb ? Line strength index of Mgb
(Error∼0.1Å) (1)
31- 34 F4.1 0.1nm Fe5270 ? Line strength index of Fe at 5270Å
(Error∼0.1Å) (1)
36- 39 F4.1 0.1nm Fe5335 ? Line strength Fe index at 5335Å
(Error∼0.1Å) (1)
41- 43 I3 km/s sigma0 ? Velocity dispersion (2)
45- 46 I2 km/s e_sigma0 ? Error in sigma0
48- 52 F5.2 mag/arcsec2 <muV> ? Mean surface brightness
(Error∼0.1mag) (3)
54- 56 F3.1 arcsec Re ? Effective radius (Error∼0.1")
58- 61 F4.1 10nm-1 S/N Signal to noise ratio (Å-1, observed)
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Note (1): Line strengths are given in angstroms of equivalent width, with
negative values denoting emission and positive values indicating
absorption. No aperture corrections have been applied to the indices.
Note (2): The values are aperture corrected to a 3.4" diameter aperture at the
distance to the Coma Cluster.
Note (3): Mean surface brightness within the effective radius, Re, in rest-frame
V band and is corrected for cosmological dimming.
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Global Notes:
Note (G1): Objects identified as [TEK2003] NN-N-NNN in Simbad
(for example: p15i144c4 translates into [TEK2003] 15-4-144)
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History:
From electronic version of the journal
References:
Treu et al., Paper I 2003ApJ...591...53T 2003ApJ...591...53T, Cat. J/ApJ/591/53
Kneib et al., Paper II 2003ApJ...598..804K 2003ApJ...598..804K
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 20-Oct-2006