J/ApJ/659/1138 Intermediate-redshift spiral galaxies Vmax (Moran+, 2007)
Dynamical evidence for environmental evolution of intermediate-redshift spiral
galaxies.
Moran S.M., Miller N., Treu T., Ellis R.S., Smith G.P.
<Astrophys. J., 659, 1138-1152 (2007)>
=2007ApJ...659.1138M 2007ApJ...659.1138M
ADC_Keywords: Clusters, galaxy ; Rotational velocities ; Magnitudes, absolute
Keywords: galaxies: clusters: individual (Cl 0024+1654, MS 0451-03) -
galaxies: evolution - galaxies: kinematics and dynamics -
galaxies: spiral - galaxies: stellar content
Abstract:
Combining resolved optical spectroscopy with panoramic HST imaging, we
study the dynamical properties of spiral galaxies as a function of
position across two intermediate-redshift clusters, and we compare the
cluster population to field galaxies in the same redshift range. By
modeling the observed rotation curves, we derive maximal rotation
velocities for 40 cluster spirals and 37 field spirals, yielding one
of the largest matched samples of cluster and field spirals at
intermediate redshift. We construct the Tully-Fisher (TF) relation in
both V and Ks bands, and find that the cluster Tully-Fisher relation
exhibits significantly higher scatter than the field relation, in both
V and Ks bands.
Description:
We make use of HST imaging of Cl 0024 (ClG 0024+1652) and MS 0451
(ClG 0451-03) from the comprehensive wide-field survey described in
Treu et al. (2003, Cat. J/ApJ/591/53) and G.P. Smith et al. (2007,
in preparation). We also use panoramic ground-based Ks-band imaging of
both clusters, and J-band imaging of Cl 0024, with the WIRC camera on
the Hale 200 inch (5.08m) Telescope. Observations were made in 2004
November for MS 0451 and 2002 October for Cl 0024. The details of the
observations and data reduction are described by Smith et al.
(2005ApJ...620...78S 2005ApJ...620...78S) and G.P. Smith et al. (2007, in preparation)
for Cl 0024 and MS 0451, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 93 77 Information and measurements of Cl 0024, MS 0451,
and field galaxies
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See also:
J/ApJ/591/53 : I photometry of Cl 0024+16 (Treu+, 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- [MMT2007b] Object designation
11- 17 A7 --- Sample Sample (Cl 0024, MS 0451 or Field)
19- 23 F5.3 --- z Redshift
25- 33 F9.6 deg RAdeg Right ascension in decimal degrees (J2000)
35- 44 F10.6 deg DEdeg Declination in decimal degrees (J2000)
46- 50 F5.2 kpc Rs Scale length measured via GALFIT (1)
51 A1 --- n_Rs [*] * where Rs was set manually to improve
the fit
53- 56 F4.1 deg i Inclination measured via GALFIT.
i=90° indicates edge-on (1)
58- 59 I2 deg SlPA Misalignment between the PA of the
spectroscopic slit and the major axis of
the galaxy (1)
61- 66 F6.2 mag VMAG Absolute magnitude in rest-frame V band (2)
68- 71 F4.2 mag e_VMAG rms uncertainty on VMAG
73- 78 F6.2 mag KMAG ?=- Absolute magnitude in rest-frame K band (2)
80- 83 F4.2 mag e_KMAG ?=- rms uncertainty on KMAG
85- 87 I3 km/s Vmax Measured maximal rotation velocity, weighted
average in cases where more than one emission
line was measured
89- 91 I3 km/s e_Vmax rms uncertainty on Vmax
93 I1 --- Q [1/2] Rotation curve quality (3)
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Note (1): Typical formal errors on Rs, i, and SlPA are 10%, 0.5° and
1°, respectively, and systematic uncertainties in i and SlPA are
typically ∼10°.
Note (2): corrected for inclination-dependent internal extinction.
Note (3): Rotation curve quality as follows:
1 = curves display turnovers on both ends
2 = curves display only one turnover, or an uncertain fit
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 02-Jun-2010