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J/ApJ/659/1138 Intermediate-redshift spiral galaxies Vmax (Moran+, 2007)
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Beginning of ReadMe :J/ApJ/659/1138 Intermediate-redshift spiral galaxies Vmax (Moran+, 2007)
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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
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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) and G.P. Smith et al. (2007, in preparation)
for Cl 0024 and MS 0451, respectively.