J/ApJ/671/1503 Cl 0024+16 and MS 0451-03 spectrophotometry (Moran+, 2007)
A wide-field survey of two z∼0.5 galaxy clusters: identifying the physical
processes responsible for the observed transformation of spirals into S0s.
Moran S.M., Ellis R.S., Treu T., Smith G.P., Rich R.M., Smail I.
<Astrophys. J., 671, 1503-1522 (2007)>
=2007ApJ...671.1503M 2007ApJ...671.1503M
ADC_Keywords: Clusters, galaxy ; Redshifts ; Photometry, HST ; Spectroscopy
Keywords: galaxies: clusters: individual (Cl 0024+1654, Cl 0024+1654,
Cl 0024+1654, MS 0451-0305, MS 0451-0305, MS 0451-0305) -
galaxies: elliptical and lenticular, cD - galaxies: evolution -
galaxies: spiral - galaxies: stellar content - ultraviolet: galaxies
Abstract:
We present new results from our comparative survey of two massive,
intermediate-redshift galaxy clusters, Cl 0024+17 (z=0.39) and MS
0451-03 (z=0.54). Combining optical and UV imaging with spectroscopy
of member galaxies, we identify and study several key classes of
"transition objects" whose stellar populations or dynamical states
indicate a recent change in morphology and star formation rate. For
the first time, we have been able to conclusively identify spiral
galaxies in the process of transforming into S0 galaxies. This has
been accomplished by locating both spirals whose star formation is
being quenched and their eventual successors, the recently created
S0s.
Description:
We make use of HST imaging of Cl 0024 and MS 0451 from the
comprehensive wide-field survey described in Paper I (Treu et al.,
Cat. J/ApJ/591/53) and G.P. Smith et al. (2008, in preparation).
Cl 0024 and MS 0451 were observed for 15 and 80ks, respectively, with
GALEX in 2004 October (GO-22; Cycle 1; PI: Treu), reaching comparable
depths in rest-frame far-ultraviolet (FUV) (observed near-ultraviolet
[NUV]).
We have used DEIMOS on Keck II to obtain deep spectra of ∼1500
galaxies per cluster in the fields of Cl 0024 and MS 0451.
Observations of Cl 0024 from 2001 October to 2003 October are
described in Papers I (Treu et al., Cat. J/ApJ/591/53) and III
(Moran et al., Cat. J/ApJ/634/977). We undertook an initial redshift
survey of MS 0451 during 2003 October. We have additionally observed
both clusters again in 2004 December and 2005 October.
Objects:
-----------------------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------------------
00 26 36.0 +17 08 36 Cl 0024 = ZwCl 0024+1652
04 54 10.9 -03 01 07 MS 0451-03 = ClG 0451.6-0305
-----------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 28 1562 MS 0451-03 redshift catalog
table3.dat 74 483 Photometric and spectroscopic measurements for
all cluster galaxies
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See also:
J/ApJS/116/247 : CNOC cluster redshift survey catalogs. VI. (Ellingson+ 1998)
J/ApJ/591/53 : I photometry of Cl 0024+16 (Treu+, 2003)
J/ApJ/634/977 : Redshifts in Cl 0024+16 members (Moran+, 2005)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.6 deg RAdeg Right Ascension in decimal degrees (J2000) (G1)
11- 19 F9.6 deg DEdeg Declination in decimal degrees (J2000) (G1)
21- 26 F6.3 --- z Redshift
28 A1 --- r_z [1/2] Redshift source: 1 = Keck/DEIMOS,
2 = Ellingson et al. 1998 (J/ApJS/116/247)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.6 deg RAdeg Right Ascension in decimal degrees (J2000) (G1)
11- 19 F9.6 deg DEdeg Declination in decimal degrees (J2000) (G1)
21- 26 F6.4 --- z Redshift
28- 31 A4 --- MType Morphology type
33- 36 F4.1 mag Imag HST F814W band (∼I band) magnitude
38- 42 F5.1 mag VMAG Absolute V band magnitude
44 A1 --- l_[OII] Limit flag on [OII]
45- 50 F6.1 0.1nm [OII] ? [OII] (3727Å) equivalent width (1)
52- 55 F4.1 0.1nm e_[OII] ? Uncertainty in [OII]
57- 60 F4.2 --- Dn ? Dn(4000) index (2)
62- 65 F4.2 --- e_Dn ? Uncertainty in Dn
67- 70 F4.1 0.1nm HdA ? The HδA index (1)
72- 74 F3.1 0.1nm e_HdA ? Uncertainty in HdA
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Note (1): Described in Paper III, Moran et al., Cat. J/ApJ/634/977.
Note (2): Indicates the strength of the 4000 Angstrom break; we adopt the
definition from Balogh et al. (1999ApJ...527...54B 1999ApJ...527...54B).
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Glonal notes:
Note (G1):
In table 2, Source identified as [MET2005] 6.dddddd+17.dddddd for Cl 0024,
[MET2007] 73.dddddd-d.dddddd for MS 0451-03.
In table 3, Source identified as [MET2005] 6.dddddd+17.dddddd for Cl 0024,
[MET2007] 73.dddddd-d.dddddd from table 2 otherwise.
--------------------------------------------------------------------------------
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
Moran et al., Paper III 2005ApJ...634..977M 2005ApJ...634..977M, Cat. J/ApJ/634/977
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 27-Mar-2010