Mathematics – Probability
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...289..749f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 289, no. 3, p. 749-755
Mathematics
Probability
1
Disks, Galactic Evolution, Interstellar Matter, Kinematics, Milky Way Galaxy, Spreading, Star Formation, Viscous Flow, Angular Momentum, Chemical Evolution, Probability Distribution Functions, Radial Flow, Radial Velocity
Scientific paper
In a viscous star-forming thin disc in which both the kinematical viscosity and the star formation time-scale are proportional to radius, a self-similar solution exists. It describes an essentially exponential gaseous disc, whose radial scale-length grows with time. Matter flows preferentially outwards. A single parameter describes the shape of the evolving gas distribution - the efficiency of the star forming process. The pronounced galactic central gas depression is reproduced, provided this efficiency exceeds a certain limit. The location of the gas surface density maximum is moving outwards, too. Numerical simulations suggest that any viscous axisymmetric gas distribution approaches this self-similar solution quite quickly. The self-similar solution matches the galactic gas distribution indeed well. To represent the stellar profile would require a radially more extended gas disc than indicated by observations.
No associations
LandOfFree
Self-similar spreading of a viscous, star-forming galactic disc does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Self-similar spreading of a viscous, star-forming galactic disc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-similar spreading of a viscous, star-forming galactic disc will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1786645