A CCD H-alpha survey of nearby southern spiral galaxies.
Abstract
Some initial results of a flux-calibrated CCD H-alpha imaging program of bright, nearby southern spiral galaxies are presented. Very few southern hemisphere spiral galaxies have ever been completely imaged in H-alpha, let alone with a CCD. This survey, when combined with spectrophotometry of the H II regions thus revealed, permits the tracing of the chemical evolution of each galaxy. Furthermore, since the absolute H-alpha flux is a reliable measure of the high-mass star formation rate in a galaxy, such observational data permits testing of the predictions of the various star-formation theories.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- 1991
- DOI:
- Bibcode:
- 1991PASA....9...89R
- Keywords:
-
- Charge Coupled Devices;
- H Alpha Line;
- Sky Surveys (Astronomy);
- Spiral Galaxies;
- B Stars;
- H Ii Regions;
- O Stars;
- Southern Sky;
- Star Formation;
- Astronomy