Abstract
One of the main reasons for pursuing a gravitational as opposed to a magnetic theory is that there exist galaxies which seem devoid of gas and yet show unmistakable structure. These galaxies are among those classified as SBO 2/3 to SBa(r), and I shall, after Curtis, call them theta galaxies. Examples are: NGC 1512, 1291,4693, and 2859. The theta galaxies gradually merge into ringed bar galaxies, which in turn merge into ordinary spirals.
Cite
CITATION STYLE
APA
Kalnajs, A. J. (1973). Spiral Structure Viewed as a Density Wave. Publications of the Astronomical Society of Australia, 2(4), 174–177. https://doi.org/10.1017/s1323358000013461
Register to see more suggestions
Mendeley helps you to discover research relevant for your work.
Already have an account? Sign in
Sign up for free