The 21-CM Absorption Profiles of DR 21 and the Source Near NGC 6857

• 1 December 1969
• journal article
• Published by American Astronomical Society in The Astrophysical Journal
• Vol. 158, 939
• https://doi.org/10.1086/150253

Abstract

Keywords

• STARS
• RADIO ASTRONOMY
• INTERSTELLAR MATTER
• GALAXIES
• IONS
• LINE SPECTRA
• VELOCITY
• ABSORPTION SPECTRA
• MICROWAVE SPECTROSCOPY
• THERMODYNAMICS
• ASTRONOMY
• HYDROGEN