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Galaxy Interactions and Star Formation: Results of a Survey of Global Ha Emission in Spiral Galaxies in 8 Clusters

Published online by Cambridge University Press:  12 April 2016

C. Moss
C. Moss*
Affiliation:
Institute of Astronomy, Cambridge, U.K.

Extract

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Kennicutt & Kent (1983) have shown that the global Ha emission from a spiral galaxy is an indicator of the formation rate of massive stars. Moss, Whittle &: Irwin (1988) have surveyed two clusters (Abell 347 and 1367) for galaxies with Ha emission using a high dispersion objective prism technique. The purpose of the survey is to investigate environmental effects on star formation in spiral galaxies, and in particular to ascertain whether star formation is enhanced in cluster spirals. Approximately 20 % of CGCG galaxies were detected in emission. Two plates of excellent quality were obtained for each of the two clusters, and galaxies were only identified to have emission if this was detected on both plates of a plate pair. In this way, plate flaws and other spurious identifications of emission could be rejected, and weak emission confirmed.

Type
IV. Observations of Global Activity due to Interaction
Information
International Astronomical Union Colloquium , Volume 124: Paired and Interacting Galaxies , 1990 , pp. 327 - 330
Copyright
Copyright © NASA 1990

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