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| Paper: |
Calibration of the CCD Tully-Fisher relation |
| Volume: |
4, The Extragalactic Distance Scale: Proceedings of the ASP 100th Anniversary Symposium |
| Page: |
300 |
| Authors: |
Willick, Jeffrey A. |
| Abstract: |
CCD images of galaxies permit one to carry out accurate galaxy photometry using well-defined apertures. They provide, in addition, surface photometric data which yield accurate inclination estimates for spirals based on isophote ellipticity. Such images have been used to develop a more accurate version of the luminosity-21 cm linewidth correlation for spirals. When line of sight depth within galaxy clusters is accounted for by noting redshift-distance correlations among galaxies belonging to a given cluster, the scatter in the luminosity-21 cm linewidth relation appears to be as small as 0.23 mag. |
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