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J/ApJ/542/673 Morphological types of galaxies in clusters (Fasano+, 2000)
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The evolution of the galactic morphological types in clusters.
Fasano G., Poggianti B.M., Couch W.J., Bettoni D., Kjaergaard P., Moles M.
<Astrophys. J. 542, 673 (2000)>
=2000ApJ...542..673F
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ADC_Keywords: Clusters, galaxy ; Morphology ; Redshifts
Keywords: galaxies: clusters: general - galaxies: evolution -
galaxies: structure
Abstract:
The morphological types of galaxies in nine clusters in the redshift
range 0.1<~z<~0.25 are derived from very good seeing images taken at
the North Optical Telescope (NOT) and the La Silla-Danish telescopes,
with all galaxies at M_V_<-20 and within the central ~1Mpc^2^ area
being classified. With the purpose of investigating the evolution of
the fraction of different morphological types with redshift, we
compare our results with the morphological content of nine distant
clusters studied by the MORPHS group, five clusters observed with
HST/WFPC2 at redshift z=0.2-0.3, and Dressler's large sample of nearby
clusters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 67 10 Cluster parameters
table3.dat 59 383 Positions and the morphological classifications
of all galaxies in our sample
table5.dat 44 23 Cluster backgrounds
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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- 5 A5 --- --- [Abell]
7- 10 I4 --- Abell Cluster number
12 A1 --- n_Abell [ls] Note on Cluster (1)
15- 19 F5.3 --- z Redshift
22- 23 I2 h RAh Right ascension (J2000)
25- 26 I2 min RAm Right ascension (J2000)
28- 29 I2 s RAs Right ascension (J2000)
31 A1 --- DE- Declination sign (J2000)
32- 33 I2 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 39 I2 arcsec DEs Declination (J2000)
42- 45 F4.2 mag E(B-V) Reddening
47 I1 --- Run Run number
49- 51 F3.1 Mpc+2 Area Cluster area
53- 56 F4.2 arcsec Seeing Seeing in arcsec
58- 61 F4.2 kpc Seeingpc Seeing in kpc
63- 67 F5.2 mag rmag Gunn r magnitude limit
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Note (1): Two entries for A2192:
l: Data refers to four contiguous Gunn r images covering a quite large area
s: Data relates to a smaller part of the cluster, for which (B-Gr) colors
of galaxies are available, thus allowing a more accurate photometric
calibration.
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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- 5 A5 --- --- [Abell]
7- 10 I4 --- Abell Abell cluster number (AAAA)
16- 17 I2 --- Galaxy Galaxy number in Abell cluster (NN)
([FPC2000] ACO AAAA NN in Simbad)
22- 23 I2 h RAh Right Ascension (J2000)
25- 26 I2 min RAm Right Ascension (J2000)
28- 32 F5.2 s RAs Right Ascension (J2000)
36 A1 --- DE- Sign of the Declination (J2000)
37- 38 I2 deg DEd Declination (J2000)
40- 41 I2 arcmin DEm Declination (J2000)
43- 47 F5.2 arcsec DEs Declination (J2000)
52- 59 A8 --- Mtype Galaxy morphological type (? indicates
uncertain classification)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Cluster Abell Cluster Name
10- 17 A8 --- Sample Sample from which cluster data was obtained
from (1)
19- 23 F5.3 --- z Redshift of the cluster
26- 28 F3.1 --- EField Expected number of field Elliptical
galaxies (2)
31- 33 F3.1 --- SOField Expected number of field SO type galaxies (2)
36- 39 F4.1 --- SpField Expected number of field Spiral galaxies (2)
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Note (1): References
OUR = This work
C98 = Couch W.J., Barger A.J., Smail I., Ellis R.S., Sharples R.M.,
1998, Cat. <J/ApJ/497/188>
MORPHS = Dressler A., Oemler A., Couch W.J., Smail I., Ellis R.S.,
Barger A., Butcher H., Poggianti B.M., Sharples R.M.,
1997ApJ...490..577D
Note (2): The field galaxies have been determined from the galaxy number
counts given by Metcalfe et al (1995MNRAS.273..257M) and the breakdown
into morphological classes (E/S0/Sp=18:27:56) was computed for our
limiting magnitudes at z{~}0.2 from the fits to the differential
number counts of the Medium Deep Survey.
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History:
From electronic version of the journal
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(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 19-Mar-2001