Statistics and properties of H II regions in a sample of grand design galaxies I. Luminosity functions.

Bibcode
1996A&A...307..735R
Rozas, M.; Beckman, J. E.; Knapen, J. H.
Bibliographical reference

Astronomy and Astrophysics, v.307, p.735-744

Advertised on:
3
1996
Journal
Astronomy and Astrophysics
Number of authors
3
IAC number of authors
1
Citations
90
Refereed citations
75
Description
We present new high quality continuum-subtracted Hα images of the grand-design galaxies NGC 157, NGC 3631, NGC 6764 and NGC 6951. We have determined the positions, angular sizes, and fluxes of their individual HII regions, and describe statistical properties of the HII region samples. We construct luminosity functions for all the HII regions in the disc and separately for arm and interarm zones for each galaxy. The slopes of the luminosity functions for the complete sample agree well with values published for other spiral galaxies of comparable morphological type. For three galaxies we determined the slopes of the luminosity functions for the spiral arm and interarm zones separately. We find that for NGC 157, NGC 3631, and NGC 6951 these slopes are equal within the errors of determination. We compare our results to those found from earlier work, specifically for M51 and NGC 6814, and discuss implications for massive star forming processes.
Type
Refereed
Galaxies

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