Neutral hydrogen in galaxies of early and other types.
Abstract
Neutral hydrogen measurements have been made of 29 galaxies with the Mark I and Mark II telescopes. The galaxies were mainly early types, although four Seyferts and a group of peculiar and other interesting objects were included. Spectra of the more intense galaxies are shown. An interesting result is the large neutral hydrogen content of the earlytype galaxies (de Vaucouleurs types -3 to + i) compared with the trend of neutral hydrogen contents indicated by the late-type galaxies. The importance of this result for theories of galactic evolution is stressed. The neutral hydrogen content and velocity spread of the Seyfert and peculiar galaxies is found to be consistent with their morphological types and appears to be unaffected by their optical peculiarities.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- 1973
- DOI:
- 10.1093/mnras/165.2.213
- Bibcode:
- 1973MNRAS.165..213L