Some effects of shocks in H II regions

Details Some effects of shocks in H II regions Some effects of shocks in H II regions

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....58..437m&link_type=abstract

Astronomy and Astrophysics, vol. 58, no. 3, June 1977, p. 437, 438.

Astronomy and Astrophysics

Astrophysics

1

H Ii Regions, Nebulae, O Stars, Shock Wave Propagation, Stellar Envelopes, Stellar Luminosity, Astronomical Models, Finite Difference Theory, Magellanic Clouds

Scientific paper

Some possible effects of strong shocks traveling through an H II region are investigated using a theoretical model of an H II region around an O6 star in a uniform medium. The diffuse radiation field produced by H, He, and He(+) is taken into account along with collisional ionization. An expansion velocity of 200 km/s is introduced in the central parts of the model nebula to produce a shocked shell, and the subsequent hydrodynamic evolution of the nebula is followed. The results show that a modest increase in shell density can trigger recombination processes in the outer regions of the nebula.

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