Image Details
Caption: Fig. 1.
Continuum‐subtracted Hα emission‐line images in gray scale for (a) M51, (b) M81, (c) M101, (d) NGC 2403, (e) NGC 4395, (f) NGC 6946, and (g) IC 342. North is to the top, and East is to the left. The straight lines mark the slit positions we used in the spectroscopic observations (WHL and Wang 1998). The scale of the images is represented by the length of the slit of 5﹩\arcmin﹩.
© 1999. The American Astronomical Society. All rights reserved. Printed in U.S.A.