Dynamical evolution of a dusty H II-region

Details Dynamical evolution of a dusty H II-region Dynamical evolution of a dusty H II-region

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....77..165g&link_type=abstract

Astronomy and Astrophysics, vol. 77, no. 1-2, Aug. 1979, p. 165-177. Deutsche Forschungsgemeinschaft

Astronomy and Astrophysics

Astrophysics

15

Cosmic Dust, H Ii Regions, Interstellar Matter, Diffusion, Gas Density, Gas Heating, Graphs (Charts), Helium, Hot Stars, Hydrodynamic Equations, Silicates, Stellar Envelopes

Scientific paper

A previously described method is applied to a dusty model H II region in order to compute the evolution of hydrodynamical parameters, the evolution of the ionization structure of H and He, and the diffusion effect among all relevant components (H, He, dust). The space-time evolution of a spherical gas-dust cloud around a central star capable of ionizing the surrounding medium is considered for the case of a steady-state, homogeneous, and isotropic cold cloud consisting of H, He, and dust, and with a hot star formed at the center. The results obtained are shown to provide both a quantitative picture of the global hydrodynamical evolution of the H II region and a variety of effects giving detailed insight into the dynamical coupling of the different components and its relevance to local and global evolution.

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