Download Internal Kinematics and Dynamics of Galaxies by Vera C. Rubin (auth.), E. Athanassoula (eds.) PDF

By Vera C. Rubin (auth.), E. Athanassoula (eds.)

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Thus, it is not possible to satisfy either equation (1) or (2) with all of the galactic mass at large R in a thin disk. By relaxing the condition that all of the mass implied by the rotation curve resides in the disk, it is possible to avoid these difficulties. Thus, without any assumptions about the mass-to-light ratio or the form of the disk mass distribution, the CO rotation curve and the run of HI scale height imply that a significant fraction of the mass of the Milky Way lies outside the disk.

Young, J. Z. J. July 15. Young, J. Z. J. Letters). THE CO ROTATION CURVE OF THE MILKY WAY ACCURACY AND IMPLICATIONS Leo Blitz University of Maryland The CO rotation curve exhibits an increase in circular velocity beyond R = 12 kpc (Blitz, Fich, and Stark 1980) which may be as much as 50 km s-l at R = 18 kpc. Recently, Blitz and Fich (1983) have examined the uncertainties in the rotation curve at large R and have concluded that: 1) Of all the uncertainties, small changes in Rand 8 have the most serious effect on the rise at large R.

Astro. 102, L13. Sancisi, R. 74, 73. M. and Scoville, ~Z. J. Suppl. 31, 313. Z. J. 199, Ll05. Z. and Young J. 1982 (Preprint). Z. 1979, IAU Symposium No. 84 ed. B. Burton, p. 35. M. , 1980, "Giant Molecular Clouds in the Galaxy" eds. P. Solomon and M. Edmunds, Pergamon Press. B. and deZafra, R. J. Letters). , Barrett, J. and deZafra R. J. M. 1983 (to be published). Stark, A. D. Thesis, Princeton University. Young, J. Z. J. July 15. Young, J. Z. J. Letters). THE CO ROTATION CURVE OF THE MILKY WAY ACCURACY AND IMPLICATIONS Leo Blitz University of Maryland The CO rotation curve exhibits an increase in circular velocity beyond R = 12 kpc (Blitz, Fich, and Stark 1980) which may be as much as 50 km s-l at R = 18 kpc.

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