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Massive star formation in NGC 6946

DeGioia-Eastwood, K. and Grasdalen, G. L. and Strom, S. E. and Strom, K. M. (1984) Massive star formation in NGC 6946. The Astrophysical Journal, 278. pp. 564-574. ISSN 0004-637X


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Publisher’s or external URL: http://adsabs.harvard.edu/abs/1984ApJ...278..564D


H-alpha measurements of the late-type spiral galaxy NGC 6946 are presented. Assuming an initial mass function, the H-alpha data are used to calculate the total star formation rate and efficiency of massive star formation as a function of galactocentric radius. An attempt is made to determine the factors influencing these quantities by comparing them to the surface densities of H I and H 2 and the degree of compression suffered by the gas in spiral density wave theory. The rate of star formation is very closely correlated with the first power of the surface density of H2, and somewhat less correlated with the degree of compression of the gas predicted by density wave theory. In contrast, the efficiency of massive star formation is roughly constant across the face of the galaxy.

Item Type: Article
Publisher’s Statement: © 1984 The American Astronomical Society. Published in The Astrophysical Journal.
ID number or DOI: 10.1086/161823
Keywords: Density Wave Model; Galactic Evolution; Galactic Nuclei; Gas Density; H Alpha Line; Interstellar Matter; Radii; Rates (Per Time); spiral galaxies; Star Formation; Star Formation Rate; Stellar Mass
Subjects: Q Science > QB Astronomy
NAU Depositing Author Academic Status: Faculty/Staff
Department/Unit: College of Engineering, Forestry, and Natural Science > Physics and Astronomy
Date Deposited: 16 Oct 2015 20:51
URI: http://openknowledge.nau.edu/id/eprint/1341

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