Concept information
Preferred term
Oort constants
Definition
- Two parameters, denoted A and B, that describe the major features of our Galaxy's differential rotation in the Sun's neighbourhood. A is one-half of the shear and equal to +14.4 ± 1.2 km s^-1 kpc^-1, and B, one-half of the vorticity, equal to -12.0 ± 2.8 km s^-1 pc^-1. (en)
Broader concept
- Astronomical models (en)
- Galaxy rotation (en)
Editorial note
URI
http://astrothesaurus.org/uat/1159
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