Image Details
 
                    Caption: Fig. 1.
Spectra of the 6016 and 6049 MHz transitions in W3(OH). Emission in the 6049 MHz transition is stronger than absorption in the 6016 MHz transition. A single‐Gaussian fit to the emission is narrower than a similar fit to the absorption.
© 2007. The American Astronomical Society. All rights reserved. Printed in U.S.A.