| Autor: |
Marochnik, L. S., Suchkov, A. A. |
| Zdroj: |
Astrophysics and Space Science; October 1981, Vol. 79 Issue: 2 p337-343, 7p |
| Abstrakt: |
At present the wave theory of the spiral structure of the galaxies includes two alternative viewpoints. Two types of spiral waves—short-wave and long-wave modes—can be excited. According to Lin and Shu (1964) the short-wave modeK8 is responsible for the spiral structure of the galaxies and, according to Marochniket al. (1972), the long-wave mode (K0). In our Galaxy theK8-mode corresponds to the wave with an angular rotation velocityOp=11–13 kms-1 kps-1 and a radial group velocity directed from the periphery to the center. TheK0-mode corresponds to the wave having an angular rotation velocityOp=23 ± 3 kms-1 kps-1 and a radial group velocity directed from the center of the Galaxy to its periphery. The theoretical and observational evidences in favour of Marochniket al.'s (1972) model are given. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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