Image Details
Caption: Fig. 4.
Correlations between the [N II]/Hα ratio and the crossing time of galaxies in the HCGs tc. The results are shown for the entire sample (top left), E–S0 galaxies (top right), S0a–Sbc galaxies (bottom left), and Sc or later (bottom right).
© 2000. The American Astronomical Society. All rights reserved. Printed in U.S.A.