On the formation of exponential discs

Details On the formation of exponential discs On the formation of exponential discs

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.236..779y&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 236, Feb. 15, 1989, p. 779-799. Research supported by t

Astronomy and Astrophysics

Astronomy

55

Disk Galaxies, Galactic Evolution, Spiral Galaxies, Star Clusters, Angular Momentum, Density Distribution, Surfaces, Viscosity

Scientific paper

Analytic and semianalytic solutions to evolutionary equations for star-forming viscous disks have been obtained. It is demonstrated that approximately-exponential stellar surface density profiles result if the viscous time scale is comparable to the star-formation time scale everywhere in the disk. The results suggest that the initial gas surface density distribution must be fairly regular in order to produce final exponential stellar surface density profiles.

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