Shocks in spiral galaxies

Details Shocks in spiral galaxies Shocks in spiral galaxies

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pazh....8..653r&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 8, Nov. 1982, p. 653-656) Soviet Astronomy Letters (ISSN 0360-0327), vol. 8, Nov.-Dec.

Astronomy and Astrophysics

Astronomy

Astronomical Models, Cosmic Gases, Galactic Structure, Gas Dynamics, Shock Wave Propagation, Spiral Galaxies, Mach Number, Stellar Mass Ejection, Supernovae, Supersonic Flow

Scientific paper

If shock waves were to develop in spiral arms, then as a shock is propagated across the disk of a galaxy the front inclination angle would grow to a maximum value, reached in the limiting Mach regime. It is this relatively stable regime that would keep the spiral pitch angle approximately constant, giving the arms the shape observed. Gas ejected from supernovae exploding in the spirals could sustain this structure.

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