The composition gradient across M81

• 1 June 1987
• journal article
• Published by American Astronomical Society in The Astrophysical Journal
• Vol. 317, 82-101
• https://doi.org/10.1086/165257

Abstract

Keywords

• ABUNDANCE
• ASTRONOMICAL SPECTROSCOPY
• CHEMICAL COMPOSITION
• NEBULAE
• SPIRAL GALAXIES
• H II REGIONS
• OXYGEN SPECTRA
• PHOTOIONIZATION
• SPECTROPHOTOMETRY