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A CCD Hα Survey of Nearby Southern Spiral Galaxies

Published online by Cambridge University Press:  25 April 2016

Stuart D. Ryder  and
Michael A. Dopita
Stuart D. Ryder
Affiliation:
Mount Stromlo and Siding Spring Observatories, Private Bag, Weston ACT 2611
Michael A. Dopita
Affiliation:
Mount Stromlo and Siding Spring Observatories, Private Bag, Weston ACT 2611
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Abstract

Some initial results of a flux-calibrated CCD Hα imaging program of bright, nearby southern spiral galaxies are presented. Very few southern hemisphere spiral galaxies have ever been completely imaged in Hα, let alone with a CCD. This survey (which mainly uses the MSSSO 1.0-m reflector with an f/3.5 focal reducer) will, when combined with spectrophotometry of the H II regions thus revealed, allow us to trace the chemical evolution of each galaxy. Furthermore, since the absolute Hα flux is a reliable measure of the high-mass star formation rate in a galaxy, such observational data will permit us to test the predictions of the various star formation theories.

Type
Extragalactic
Information
Publications of the Astronomical Society of Australia , Volume 9 , Issue 1 , 1991 , pp. 89 - 90
Copyright
Copyright © Astronomical Society of Australia 1991

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