The Oosterhoff effect.
Abstract
It is found (greater than 99 percent confidence) that globular clusters of Oosterhoff class I lie on retrograde orbits more frequently than do clusters of Oosterhoff class II. A possible explanation for the observed correlation between the orbital parameters of globular clusters and the properties of their RR Lyrae stars is that the main body of the proto-Galaxy captured at least one massive ancestral galaxy in a retrograde orbit.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- June 1993
- DOI:
- 10.1093/mnras/262.3.588
- Bibcode:
- 1993MNRAS.262..588V
- Keywords:
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- Galactic Evolution;
- Globular Clusters;
- Stellar Orbits;
- Variable Stars;
- Metallicity;
- Milky Way Galaxy;
- Astrophysics