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Extra resources for Astrophysik IV: Sternsysteme / Astrophysics IV: Stellar Systems
Astr. Inst. ' 6, 249 (1932). J. C. KAPTEYN: Mt. Wilson Contr. No. 230 = Astrophys. J ourn. 55, 302 (1922). P. J. VAN RHlJN: Publ. Astronom. Lab. Groningen No. 38. 47 Force at right angles to the galactic plane. Sect. 15. Table 2. M Spectrum Bo-B9 Ao-A9 Fo-F9 GO-G9 GO-G9 KO-Mc Ko-Mc ::;;; ::;;;: ::;;; ::::: I, i>. 020 0·910 0·915 0·775 I. 4 +3·5 Table 3. Mvl. I, 1 I, I. ift 0, 0. 050 I I i derived by LINDBLAD 1 and PETERSSON 2 were also considered. 1) Table 4. 6) K(z) 10-' cm/sec' The results adopted are the means of four groups of different 50 -0·77 absolute magnitudes, and are given in Table 4.
CAMM: Monthly Notices Roy. Astr-onom. Soc. London 101, 195 (1941). Sect. 11. Star-streaming in a local region. 37 In this case the velocity ellipsoid has three un-equal axes even at the centre of the system, but also here two of the axes lie in the plane through the axis of symmetry. 2) in a somewhat different form, and has applied it for deriving a model of the Galaxy. Though the special cases (2) are of theoretical interest, it seems very difficult to see how such highly specialized potential functions (except in the spherical case) may arise by an irregular process of mixing, such as described in Sects.
STROMBERG in his first paper remarks that the motions of the brighter stars have 'ovell been explained by JEAKS through the gravitational action of the stars in the local or "KAPTEYK" universe, but that "in order to account for the existence of stars of very high velocity through gravitational action of the system as a whole, we must include in our study a system of much larger dimensions". He further remarks that the direction of asymmetry is nearly in the galactic plane and nearly perpendicular to the direction toward the centre of the globular clusters as determined by SHAPLEY, that the velocity of translation is about 300 km/sec, and that it is possible that the local system moves around the centre of the large system with this velocity.