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J/ApJ/665/1067 Cl 0024+16 and MS 0451-03 velocities (Moran+, 2007)
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Beginning of ReadMe :J/ApJ/665/1067 Velocities in Cl 0024+16 and MS 0451-03 (Moran+, 2007)
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The dynamical distinction between elliptical and lenticular galaxies in distant
clusters: further evidence for the recent origin of S0 galaxies.
Moran S.M., Loh B.L., Ellis R.S., Treu T., Bundy K., MacArthur L.A.
<Astrophys. J., 665, 1067-1073 (2007)>
=2007ApJ...665.1067M
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ADC_Keywords: Clusters, galaxy ; Redshifts ; Rotational velocities ;
Velocity dispersion
Keywords: galaxies: clusters: general -
galaxies: elliptical and lenticular, cD - galaxies: evolution -
galaxies: spiral - galaxies: stellar content
Abstract:
We examine resolved spectroscopic data obtained with the Keck II
telescope for 44 spheroidal galaxies in the fields of two rich
clusters, Cl 0024+16 (z=0.40) and MS 0451-03 (z=0.54) and contrast
this with similar data for 23 galaxies within the redshift interval
0.3<z<0.65 in the GOODS northern field. For each galaxy we examine
the case for systemic rotation, derive central stellar velocity
dispersions sigma and photometric ellipticities epsilon. Using
morphological classifications obtained via Hubble Space Telescope
imaging as the basis, we explore the utility of our kinematic
quantities in distinguishing between pressure-supported ellipticals
and rotationally supported lenticulars (S0s).
Description:
The primary data set for this paper is a comprehensive Keck
spectroscopic and HST imaging (F814W) survey of morphologically
selected spheroidals in two clusters, Cl 0024+16 (z=0.40) and
MS 0451-03 (z=0.54).