J/A+A/524/A6 Evolution of spectral early-type galaxies (Saglia+, 2010)
The fundamental plane of EDisCS galaxies. The effect of size evolution.
Saglia R.P., Sanchez-Blazquez P., Bender R., Simard L., Desai V.,
Aragon-Salamanca A., Milvang-Jensen B., Halliday C., Jablonka P., Noll S.,
Poggianti B., Clowe D.I., De Lucia G., Pello R., Rudnick G.,
Valentinuzzi T., White S.D.M., Zaritsky D.
<Astron. Astrophys., 524, A6-6 (2010)>
=2010A&A...524A...6S 2010A&A...524A...6S
ADC_Keywords: Galaxies, spectra ; Redshifts ; Velocity dispersion
Keywords: galaxies: elliptical and lenticular, cD - galaxies: evolution -
galaxies: formation - galaxies: fundamental parameters
Abstract:
We study the evolution of spectral early-type galaxies in clusters,
groups, and the field up to redshift 0.9 using the ESO Distant Cluster
Survey (EDisCS) dataset. We measure structural parameters
(circularized half-luminosity radii Re, surface brightness Ie, and
velocity dispersions sigma) for 154 cluster and 68 field galaxies.
On average, we achieve precisions of 10% in Re, 0.1dex in logIe, and
10% in sigma. We sample ∼20% of cluster and ∼10% of field spectral
early-type galaxies to an I band magnitude in a 1arcsec radius
aperture as faint as I1=22. We study the evolution of the zero point
of the fundamental plane (FP) and confirm results in the literature,
but now also for the low cluster velocity dispersion regime.
Description:
The sample of galaxies analyzed in this paper consists of
spectroscopic early-type objects. We considered the flux-calibrated
spectra reduced in Halliday et al. (2004, Cat. J/A+A/427/397) and
Milvang-Jensen et al. (2008, Cat. J/A+A/482/419) of galaxies with
early spectral type (1 or 2).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 85 192 The FP parameters of cluster galaxies
table2.dat 85 78 The FP parameters of field galaxies
table3.dat 56 154 The structural parameters of galaxies with
measured velocity dispersions and HST photometry
derived from Sersic fits to HST images and
bulge+disk fits to VLT images
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See also:
J/A+A/427/397 : Redshifts of 5 EDisCS galaxy clusters (Halliday+, 2004)
J/A+A/482/419 : ESO Distant Cluster Survey, EDisCS. II (Milvang-Jensen+, 2008)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [EDCSN]
6- 21 A16 --- EDCSN Galaxy EDCSN name, JHHMMSSs+DDMMSS
23- 24 I2 --- Nclus ? Number of cluster (only in table1)
26- 31 F6.4 --- z Redshift
33 I1 --- S [1/2] Galaxy spectral type
35- 39 F5.1 km/s sig.m Measured velocity dispersion
41- 45 F5.1 km/s sig.c Corrected velocity dispersion
47- 50 F4.1 km/s e_sig rms uncertainty on sigma
52- 58 F7.4 kpc Re Circularized half-luminosity radius
60- 66 F7.5 [Lsun/pc2] logIe Surface brightness
67- 68 I2 --- TType ?=* Galaxy T Type
70- 74 F5.3 --- Psig sigma-completeness probability of the
velocity dispersion measurements
76- 80 F5.2 [Msun] logM* Galaxy mass
82- 85 F4.2 [Msun] e_logM* rms uncertainty on Mass
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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 --- --- [EDCSN]
6- 21 A16 --- EDCSN Galaxy EDCSN name, JHHMMSSs+DDMMSS
23- 29 F7.4 kpc ReS Circularized half-luminosity radius from
Sersic fits to HST images
31- 35 F5.3 [Lsun/pc2] logIeS Surface brightness from
Sersic fits to HST images
37- 43 F7.4 kpc ReV Circularized half-luminosity radius from
bulge+disk fits to VLT images
46- 51 F6.4 [Lsun/pc2] logIeV ? Surface brightness from
bulge+disk fits to VLT images
52- 56 I5 --- n_logIeV ? logIeV value for ReV=0
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 01-Apr-2011