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Evolution of the Mass-to-light Ratio of Galaxies to z~ 0.25

Published online by Cambridge University Press:  01 August 2006

B. Catinella ,
M. P. Haynes ,
J. P. Gardner ,
A. J. Connolly  and
R. Giovanelli
B. Catinella
Affiliation:
NAIC-Arecibo Observatory†, Arecibo, PR 00612, USA; email: [email protected]
M. P. Haynes
Affiliation:
Center for Radiophysics and Space Research and NAIC, Cornell University, Ithaca, NY 14853, USA
J. P. Gardner
Affiliation:
Dept. of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA
A. J. Connolly
Affiliation:
Dept. of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA
R. Giovanelli
Affiliation:
Center for Radiophysics and Space Research and NAIC, Cornell University, Ithaca, NY 14853, USA
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Abstract

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We present the first results of a targeted survey carried out with the 305m Arecibo radiotelescope to detect HI-line emission from disk galaxies at redshift z > 0.16. We are using this sample to study the evolution of the zero point of the Tully-Fisher relation (TFR) for galaxies at intermediate redshifts. Compared to optical widths, HI measurements sample a larger fraction of the disks, where the rotation curves are typically flat, and are not affected by slit smearing and misalignment or by aperture effects. Thus, in contrast to studies based on optical spectroscopy, this dataset allows for a direct comparison with the local TFR that is technique independent.

Keywords

galaxies: kinematics and dynamicsradio lines: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 395 - 396
Copyright
Copyright © International Astronomical Union 2007

References

York, D. G. 2000, AJ, 120, 1579CrossRefGoogle Scholar