J/ApJS/122/51 Spectroscopic catalog of 10 rich galaxy clusters (Dressler+ 1999)
A spectroscopic catalog of 10 distant rich clusters of galaxies.
Dressler A., Smail I., Poggianti B.M., Butcher H., Couch W.J.,
Ellis R.S., Oemler A.Jr
<Astrophys. J. Suppl. Ser. 122, 51 (1999)>
=1999ApJS..122...51D 1999ApJS..122...51D
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Redshifts
Keywords: galaxies: clusters: general - galaxies: distances and redshifts -
galaxies: evolution - galaxies: photometry
Abstract:
We present spectroscopic observations of galaxies in the fields of 10
distant clusters for which we have previously presented
deep imaging with WFPC2 on board the Hubble Space Telescope. The
clusters span the redshift range z=0.37-0.56 and are the subject of a
detailed ground- and space-based study to investigate the evolution of
galaxies as a function of environment and epoch. The data presented
here include positions, photometry, redshifts, spectral line
strengths, and classifications for 657 galaxies in the fields of the
10 clusters. The catalog is composed of 424 cluster members across the
10 clusters and 233 field galaxies, with detailed morphological
information from our WFPC2 images for 204 of the cluster galaxies and
71 in the field. We illustrate some basic properties of the catalog,
including correlations between the morphological and spectral
properties of our large sample of cluster galaxies. A direct
comparison of the spectral properties of the high-redshift cluster and
field populations suggests that the phenomenon of strong Balmer lines
in otherwise passive galaxies (commonly called E + A but renamed here
as the k + a class) shows an order-of-magnitude increase in the rich
cluster environment compared with a more modest increase in the field
population. This suggests that the process or processes involved in
producing k + a galaxies are either substantially more effective in
the cluster environment or that this environment prolongs the
visibility of this phase. A more detailed analysis and modeling of
these data is presented in Poggianti et al. (1999ApJ...518..576P 1999ApJ...518..576P).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 80 10 Properties of the clusters
table4a.dat 267 424 Spectroscopic catalog of cluster galaxies
table4b.dat 256 253 Spectroscopic catalog of field galaxies
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See also:
J/ApJS/78/1 : Galaxies in 7 clusters 0.35<z<0.55 (Dressler+, 1992)
J/ApJS/110/213 : Morphological Types in 10 Distant Rich Clusters (Smail+ 1997)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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2- 11 A10 --- Cl Cluster name
13- 18 F6.4 --- z Redshift
21- 24 I4 km/s sigma Velocity dispersion
26- 31 F6.4 --- zl Lower redshift limit in the cluster
32 A1 -- --- [-]
33- 38 F6.4 --- zu Upper redshift limit in the cluster
40- 41 I2 h RAh Right Ascension J2000 (hours)
43- 44 I2 min RAm Right Ascension J2000 (minutes)
46- 49 F4.1 s RAs Right Ascension J2000 (seconds)
51 A1 --- DE- Declination J2000 (sign)
52- 53 I2 deg DEd Declination J2000 (degrees)
55- 56 I2 arcmin DEm Declination J2000 (minutes)
58- 59 I2 arcsec DEs Declination J2000 (seconds)
61- 80 A20 --- Filters Name of HST filters used
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Byte-by-byte Description of file: table4a.dat table4b.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Cl Cluster name
11 A1 --- n_Cl [+] 2nd observation (originally _2)
12- 14 I3 --- [DSP99] Identification in spectroscopic catalog
for cluster (this catalog)
16- 21 F6.4 --- z Redshift
22 A1 --- u_z Uncertainty flag on z
24 I1 --- q_z Quality flag for spectra (1)
26- 31 F6.1 0.1nm [OII] ? Rest frame equivalent width for
[O II]λ3727
32 A1 --- u_[OII] Uncertainty flag on [OII]
33- 36 F4.1 0.1nm Hdelta ? Rest frame equivalent width for Hδ
(negative values indicates emission)
37 A1 --- u_Hdelta Uncertainty flag on Hdelta
39- 42 F4.2 --- D4000 ? D4000 break strength index
43 A1 ---- u_D4000 Uncertainty flag on D4000
45- 53 A9 --- Class Spectral classification (table 6) (7)
55- 60 F6.1 arcsec oRA Right ascension offset from field center in
Table 2
62- 67 F6.1 arcsec oDE Declination offset from field center in table2
69- 72 I4 --- IDHST ? Identification number in photometric catalog
for cluster (2)
74- 77 I4 pix X ? X coordinate on WFPC2 frame (2)
79- 82 I4 pix Y ? Y coordinate on WFPC2 frame (2)
84- 90 A7 --- MType Morphological type (2)
92- 94 I3 --- TType ? T type (2)
96 I1 --- D ? Visual disturbance index (2)
98-101 A4 --- Int Interpretation of disturbance (2)
103-107 F5.2 mag mag ? Total magnitude in F702W/F814W from WFPC2
frame (2) (3)
109-112 F4.2 mag Col ? Aperture color from WFPC2 frame (2) (4)
114-118 F5.2 mag magGB ? Magnitude from ground-based imaging published
in DG92 (Cat. J/ApJS/78/1) (5)
120-124 F5.2 mag ColGB ? Colour from ground-based imaging published
in DG92 (Cat. J/ApJS/78/1) (5)
126-130 A5 --- Run Code giving details of observing run (6)
132-138 A7 --- Mask Mask and object slit identifier
139-158 A20 --- Features Spectral features identified
160-267 A108 --- Com Description of features in spectrum
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Note (1): q=1 signifying the best and q=5 the worst quality
Note (2): See S97 (Smail et al., 1997, Cat. J/ApJS/110/213) for more details.
The disturbance index takes the following values:
0 = normal;
1 = moderate asymmetry;
2 = strong asymmetry;
3 = moderate distortion;
4 = strong distortion;
-99 = undefined.
Note (3): Magnitudes are F702W for
Cl 0303+17, Cl 0939+47, 3C 295, Cl 1447+26 and Cl 1601+42,
and in F814W for Cl 0016+16, Cl 0024+16, Cl 0054-27, A 370 Field 2,
Cl 0412-65, Cl 0939+47 Field 2.
Note (4): WFPC2 V555-I814 color information is available for:
Cl 0016+16, Cl 0054-27, A 370 Field 2, Cl 0412-65, Cl 0939+47, and
B450-I814 colors for Cl 0024+16.
Note (5): Aperture r-band magnitude from DG92 (Dressler & Gunn, 1992,
Cat. J/ApJS/78/1), colors are aperture (g-r) measurements in all
instances.
Note (6): [P/W/N],
P=Palomar 5 m,
W=WHT,
N=NTT, or DG92 (Dressler & Gunn, 1992, Cat. J/ApJS/78/1)
Note (7): Table 6: Spectral classification scheme
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EW
Class [O II]3727 Hδ Comments
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k Absent < 3 Passive
k+a Absent 3-8 Moderate Balmer absorption without emission
a+k Absent ≥8 Strong Balmer absorption without emission
e(c) Yes, <40 < 4 Moderate Balmer absorption plus emission,
spiral-like
e(a) Yes ≥4 Strong Balmer absorption plus emission
e(b) ≥40 Starburst
e(n) AGN from broad lines or [O III] 5007/Hβ ratio
e Yes ? With at least one emission line but S/N too low
to classify
? ? ? Unclassifiable
CSB Very blue Photometrically defined starburst
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History:
* 14-Sep-1999: From ApJS electronic version
* 12-Jun-2013: table2 corrected position of 3C295 from
14 11 10.5 +52 12 11 (original) to 14 11 20.5 +52 12 08
(End) James Marcout, Patricia Bauer [CDS] 14-Sep-1999