The metal-enriched outer disk of NGC2915
We present optical emission-line spectra for outlying H II regions in the extended neutral gas disk surrounding the blue compact dwarf galaxy NGC2915. Using a combination of strong-line R23 and direct oxygen abundance measurements, we report a flat, possibly increasing, metallicity gradient out to 1.2 times the Holmberg radius. We find the outer disk of NGC2915 to be enriched to a metallicity of 0.4 Z. An analysis of the metal yields shows that the outer disk of NGC2915 is overabundant for its...[Show more]
|Collections||ANU Research Publications|
|Source:||Astrophysical Journal, The|
|01_Werk_The_metal-enriched_outer_disk_2010.pdf||1.04 MB||Adobe PDF||Request a copy|
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.