J/ApJ/724/714 Velocity dispersions of MS1054-03 & Coma galaxies (Holden+, 2010)
M/LB and color evolution for a deep sample of M* cluster galaxies at z ∼ 1: the formation epoch and the tilt of the fundamental plane. Holden B.P., van der Wel A., Kelson D.D., Franx M., Illingworth G.D. <Astrophys. J., 724, 714-729 (2010)> =2010ApJ...724..714H
ADC_Keywords: Clusters, galaxy ; Galaxies, spectra ; Photometry ; Morphology ; Redshifts ; Velocity dispersion Keywords: galaxies: clusters: general - galaxies: clusters: individual (EMSS 1054.4-0321) - galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: fundamental parameters - galaxies: photometry Abstract: We have measured velocity dispersions (σ) for a sample of 36 galaxies with J<21.2 or Mr←20.6mag in MS 1054-03, a massive cluster of galaxies at z=0.83. Our data are of uniformly high quality down to our selection limit, our 16h exposures typically yielding errors of only δ(σ)∼10% for L* and fainter galaxies. By combining our measurements with data from the literature, we have 53 cluster galaxies with measured dispersions, and HST/ACS-derived sizes, colors and surface brightness. This sample is complete for the typical L* galaxy at z∼1, unlike most previous z∼1 cluster samples which are complete only for the massive cluster members (>1011M☉). We find no evidence for a change in the tilt of the fundamental plane (FP). Description: We based our sample on a magnitude-limited survey of galaxies in the field of MS 1054-03. The original selection was done using a limiting magnitude of J=21.2mag (Vega) from a catalog of galaxies observed with the CFH12K at CFHT and the WIRC camera on the du Pont. Each galaxy in this sample had either a spectroscopic redshift, or a photometric redshift from a catalog of BVRIJH imaging data. Galaxies with spectroscopic redshifts were preferred in our selection. These photometric redshifts, the catalog construction, and the spectroscopic subsample will be discussed in a later paper. The ACS imaging used in this paper comes from two separate programs. The first, discussed in Blakeslee et al. (2006, Cat. J/ApJ/644/30), used the F606W, F775W, and F850LP filters to image the center of the cluster. The second program imaged the outer regions of MS 1054-03 with the V606 and the F814W, or I814 filter. The spectral data were acquired over two observing runs in 2008 January and March on the DEIMOS spectrograph. Our low-redshift comparison sample is a subset of the Coma sample from Holden et al. (2007ApJ...670..190H). Objects: --------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------- 10 57 00.2 -03 37 27 MS 1054-03 = ClG 1054-03 12 59 48.7 +27 58 50 Coma cluster = ACO 1656 --------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 84 76 Data for galaxies in MS1054-03 tablea2.dat 43 80 Data for galaxies in Coma
See also: B/hst : HST Archived Exposures Catalog (STScI, 2007) J/ApJ/693/617 : Ellipticities of cluster early-type galaxies (Holden+, 2009) J/MNRAS/386/715 : Absorption-line strengths in Coma galaxies (Trager+, 2008) J/ApJ/684/905 : Galaxy clusters from IRAC Shallow Survey (Eisenhardt+, 2008) J/ApJS/169/225 : Photometry in the Coma cluster (Eisenhardt+, 2007) J/ApJ/661/750 : Photometry & spectroscopy of MS1054-03 members (Tran+, 2007) J/AJ/131/1891 : Photometric survey of MS 1054-03 field (Foerster-Schreiber+, 2006) J/ApJ/644/30 : HST Observations of 2 high-z clusters (Blakeslee+, 2006) J/AJ/131/143 : Morphology of galaxies (Homeier+, 2006) J/AJ/131/1288 : Composite spectra of early-type galaxies (Bernardi+, 2006) J/ApJ/633/174 : Spheroidals and bulge dominated galaxies (Treu+, 2005) J/AJ/127/2484 : Early-type galaxies color evolution (Holden+, 2004) Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1 A1 --- f_ID [w] w: Sample from W04 (1) 2- 6 I5 --- ID [1192/11945] Identification number 8- 12 F5.3 --- z [0.66/0.857]? Redshift 14- 18 F5.3 [km/s] sigma ? log10 of velocity dispersion 20- 24 F5.3 [km/s] e_sigma ? sigma uncertainty 26- 31 F6.3 [kpc] re log_10_ of effective radius (2) 33- 37 F5.3 [kpc] e_re re uncertainty (2) 39- 42 F4.2 --- q [0/1] Ratio of the minor to major axis (2) 44- 46 F3.1 --- n Sersic index (2) 48- 52 F5.2 mag <Ie> Average surface brightness within the effective radius in rest-frame B (-0.4µB) (2) 54- 58 F5.2 mag Bz B-band redshifted magnitude to z=0.83 60- 64 F5.2 mag (U-V)z (U-V)_z_ color index (3) 66- 70 F5.2 mag rz r-band redshifted AB magnitude to z=0.83 72- 73 I2 --- T Morphological class (4) 75- 79 F5.2 mag Jmag [0.1/21.76] J-band magnitude (Vega) 81- 84 F4.2 mag I-J [0/1.4] I-J color index
Note (1): The galaxies with redshifts are those we re-observed as part of our program. All of the other galaxies have spectroscopic information from Wuyts et al., 2004ApJ...605..677W (<[BVF2002] NNNN> in Simbad), which does not list redshifts, though those can be found in Tran et al. (2007, Cat. J/ApJ/661/750, <[VFK98] NNNN> in Simbad). Note (2): These are the measured values from fitting a elliptical Sersic model to the two-dimensional images. See section 4.1.1. Note (3): U-Vz refers to the U-V color as if measured by U and V filters redshifted to z=0.831, the redshift of the cluster. Note (4): The scheme is the same as Postman et al. (2005ApJ...623..721P). E: -5≤T≤-3, S0: -2≤T≤-1, with spirals 0≤T≤10.
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- ID [24/240] Identification number (1) 5- 9 F5.3 [km/s] sigma log10 of velocity dispersion 11- 16 F6.3 [kpc] re log10 of effective radius 18- 21 F4.2 --- q Ratio of the minor to major axis 23- 25 F3.1 --- n Sersic index 27- 32 F6.2 mag <Ie> Average surface brightness within the effective radius in rest-frame B (-0.4µB) 34- 38 F5.2 mag Bz B-band redshifted magnitude to z=0.83 40- 43 F4.2 mag (U-V)z ? (U-V) redshifted color index to z=0.831
Note (1): These are galaxies in the Jorgensen et al., 1996MNRAS.280..167J, catalog with the corresponding selection of E and S0 galaxies above a r magnitude limit of r<15.1mag AB. Each galaxy has a surface brightness profile derived from reprocessed SDSS imaging, see Holden et al. (2007ApJ...670..190H). This processing mimics what was done foro MS 1054-03, so we have comparable data sets. These galaxies are <[D80] ACO 1656 NNN> in Simbad.
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 31-Jul-2012
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