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Paper: Rotation Curves and M/L Evolution for Galaxies to Z = 0.4
Volume: 182, Galaxy Dynamics: A Rutgers Symposium
Page: 499
Authors: Bershady, M. A.; Haynes, M. P.; Giovanelli, R.; Andersen, D. R.
Abstract: We present results from an on-going [O II] λ3727 and Hα rotation-curve survey to study the evolution of the mass-to-light ratio (M/L) of spiral galaxies selected over a wide, well-defined range in rest-frame color to z = 0.4. Optical--near-infrared photometry and long-slit spectra are combined to measure residuals from a fiducial Tully-Fisher (TF) relation as a function of redshift and galaxy spectral type. While we do find a type-dependence in the B-band TF relation, there is little evidence the dependence has changed with look-back time. Larger or more detailed kinematic studies will yield further insights. We demonstrate, for example, how integral field spectroscopy will provide fundamentally new and more precise information about the evolution of star-forming disks.
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