AAS 201st Meeting, January, 2003
Session 14. Galaxy - Contents
Poster, Monday, January 6, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[14.17] A Multiwavelength Study of NGC 6946

J. R. Kachel (Denison University), L. V. Jones (University of Arizona)

We present results of a multi-wavelength study of NGC 6946. We examine ratios of various hydrogen emission lines and forbidden lines emitted by the galaxy in the visible and infrared regimes: H\beta, H\alpha, Br\gamma, [SII], and [OIII]. The data were extinction corrected using extinction maps created from both infrared and optical hydrogen recombination lines. Fluxes for previously identified HII regions were obtained from the data in these bands. We present a table of fluxes for H\alpha, H\beta, and Br\gamma, and the [OIII] / H\beta ratio and another table of star formation rates calculated for H\alpha, H\beta, and Br\gamma. There is a noticeable declining trend of the SFR with increasing galactocentric distance. The SFRs from H\beta are lower than those for H\alpha and Br\gamma, indicating a possible problem with Case B recombination (Baker & Menzel, 1938).

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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.