2 papers
astro-ph1997
Dust extinction of HII regions in NGC 598 and NGC 5457
Lars Petersen, Peter Gammelgaard
The dust extinction towards bright HII regions in NGC 598 and NGC 5457 has been studied in detail by forming line ratios of Balmer and Paschen emission lines covering a large wavel…
astro-ph1996
A sulphur abundance study of NGC 300 by an empirical calibration method
Tina Christensen, Lars Petersen, Peter Gammelgaard
We propose an empirical sulphur abundance determination method based on the strong sulphur emission lines, [S II] 6716, 6731 and [S III] 9069, 9531 in H II regions. From a compilat…