SSPSF model

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The SSPSF (stochastic self-propagating star formation) model of star formation was proposed by Mueller & Arnett[1] in 1976, generalized afterward by Gerola & Seiden[2] in 1978 and Gerola, Seiden, & Schulman[3] in 1980. This model proposes that star formation propagates via the action of shock waves produced by stellar winds and supernovae that compose the interstellar medium.

In 1999, the prevailing density wave model for the generation of spiral arms in galaxies was combined with SSPSF in an doctoral thesis by Auer.[4]

SSPSF processes were demonstrated in an early prototype ("Gaslight")[5] of the 2008 video game Spore.


  1. ^ Mueller, M. W.; Arnett, W. D. (December 1976). "Propagating star formation and irregular structure in spiral galaxies". The Astrophysical Journal. 210: 670–678. Bibcode:1976ApJ...210..670M. doi:10.1086/154873. 
  2. ^ Gerola, H.; Seiden, P. E. (July 1978). "Stochastic star formation and spiral structure of galaxies". The Astrophysical Journal. 223: 129–135, 137, 139. Bibcode:1978ApJ...223..129G. doi:10.1086/156243. 
  3. ^ Gerola, H.; Seiden, P. E.; Schulman, L. S. (December 1980). "Theory of dwarf galaxies". The Astrophysical Journal. 242: 517–527. Bibcode:1980ApJ...242..517G. doi:10.1086/158485. 
  4. ^ Auer, R. "A spiral galaxy model combining the density wave and self-propagating star formation". 
  5. ^ "Play with our Prototypes - Gaslight". Retrieved December 1, 2011.