Oort Constants

Oort Constants

The Oort Constants, named after Jan Oort, are empirically measurable constants relating to the sun's distance from and motion relative to the galactic centre.

::A=frac{1}{2}(frac{V_{o{R_{o-frac{dv}{dr})

::B=-frac{1}{2}(frac{V_{o{R_{o+frac{dv}{dr})

A = 14.82 ± 0.84 km/(kpc·s)

B = −12.37 ± 0.64 km/(kpc·s)

V_{o} is the orbital velocity of the Sun, and the R_{o} is Sun's distance form the centre of the Galaxy.

reference: http://astroprofspage.com/archives/75

reference: M. Feast and P. Whitelock, Monthly Notices of the Royal Astronomical Society, 291, 683-693 (1997).

Further reading

*http://scienceworld.wolfram.com/astronomy/OortConstants.html


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