Hydroxyl absorption in NGC 520, NGC 2623, and NGC 6240

• 1 June 1985
• journal article
• Published by American Astronomical Society in The Astrophysical Journal
• Vol. 293, 394-399
• https://doi.org/10.1086/163245

Abstract

Keywords

• ABSORPTION SPECTRA
• GALACTIC NUCLEI
• HYDROXYL RADICALS
• INTERSTELLAR GAS
• RADIO ASTRONOMY
• HYDROGEN CLOUDS
• LINE SPECTRA
• OPTICAL THICKNESS