Hubble's Calibration of the CCD Tully-Fisher Relation
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.
- Publication:
-
The Extragalactic Distance Scale
- Pub Date:
- 1988
- Bibcode:
- 1988ASPC....4..300W
- Keywords:
-
- Astronomical Photometry;
- Calibrating;
- Charge Coupled Devices;
- Spiral Galaxies;
- Galactic Clusters;
- Hubble Constant;
- Image Processing;
- Line Of Sight;
- Luminosity;
- Red Shift;
- Astrophysics