Oort constants

The Oort constants (discovered by Jan Oort) $A$ and $B$ are empirically derived parameters that characterize the local rotational properties of our galaxy, the Milky Way, in the following manner:

where $V_0$ and $R_0$ are the rotational velocity and distance to the Galactic center, respectively, measured at the position of the Sun. As derived below, they depend only on the motions and positions of stars in the solar neighborhood. As of 1997, the most accurate values of these constants are $A$ = 14.82 ± 0.84 km s kpc and $B$ = -12.37 ± 0.64 km s kpc. From the Oort constants, it is possible to determine the orbital properties of the Sun, such as the orbital velocity and period, and infer local properties of the Galactic disk, such as the mass density and how the rotational velocity changes as a function of radius from the Galactic center.

单词	Oort constants
释义	Oort constants 英语百科 Oort constants The Oort constants (discovered by Jan Oort) $A$ and $B$ are empirically derived parameters that characterize the local rotational properties of our galaxy, the Milky Way, in the following manner: where $V_0$ and $R_0$ are the rotational velocity and distance to the Galactic center, respectively, measured at the position of the Sun. As derived below, they depend only on the motions and positions of stars in the solar neighborhood. As of 1997, the most accurate values of these constants are $A$ = 14.82 ± 0.84 km s kpc and $B$ = -12.37 ± 0.64 km s kpc. From the Oort constants, it is possible to determine the orbital properties of the Sun, such as the orbital velocity and period, and infer local properties of the Galactic disk, such as the mass density and how the rotational velocity changes as a function of radius from the Galactic center.
随便看	nonlocalizable的意思 nonlocalized的意思 non localized的意思 non localized bond的意思 Nonlocalized bond的意思 nonlocalized damage的意思 non localized damage的意思 nonlocalized electron的意思 nonlocalized energy的意思 nonlocalized fringe的意思 non localized fringes的意思 nonlocalized interference的意思 non localized molecular orbital的意思 nonlocalized molecular orbital的意思 non localized particle systems的意思 nonlocalized single particle electronic states的意思 nonlocalized system的意思 nonlocalizing syndrome的意思 nonlocally的意思 non local potential的意思 Nonlocal reference的意思 nonlocal response的意思 nonlocal的意思 nonlocal theory的意思 Nonlocal variable的意思