H-alpha observations of spiral galaxies in Cancer, A1367, and Coma

Abstract

view Abstract Citations (104) References (32) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS H-alpha observations of spiral galaxies in Cancer, A 1367, and Coma. Kennicutt, R. C., Jr. ; Bothun, G. D. ; Schommer, R. A. Abstract The authors have used large aperture Hα photometry of 65 spiral galaxies in the Cancer, Coma, and Abell 1367 clusters to compare the ionized-gas contents and star-formation rates in cluster and field spirals. Overall, the authors do not observe any significant deficiency of Hα emission in the cluster members. Emission strength correlates strongly with integrated galaxy colors, but only weakly with H I content. All three clusters contain several galaxies with unusually strong Hα emission, including several H I-poor objects in Coma and A1367. Thus, spirals which appear "anemic" in their morphology or exhibit weak Hα emission are not necessarily H I poor; conversely, H I poor spirals can show strong Hα emission, indicating relatively high current star-formation rates. Gas depletion time scales for some objects in the core of Coma are significantly shorter than the field, indicating rapid stellar and gaseous evolution. Publication: The Astronomical Journal Pub Date: September 1984 DOI: 10.1086/113625 Bibcode: 1984AJ.....89.1279K Keywords: Astronomical Photometry; H Alpha Line; Spiral Galaxies; Star Clusters; Stellar Evolution; Cosmic Gases; Emission Spectra; Spectral Line Width; Star Formation Rate; Astrophysics full text sources ADS | data products NED (66) SIMBAD (62)