Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...137..276t&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 137, no. 2, Aug. 1984, p. 276-280.
Astronomy and Astrophysics
Astrophysics
13
Astronomical Models, Gas Density, Interstellar Space, Mach Reflection, Molecular Clouds, Shock Waves, Condensing, Gas Temperature, Herbig-Haro Objects, Hydrodynamic Ram Effect, T Tauri Stars
Scientific paper
A theoretical model is proposed for the generation of bullets in interstellar space. Bullets are the phenomenon which occurs as a strong shock wave overtakes a high density concentration. The model describes the propagation of interstellar bullets in terms of the interaction between a spherical missile and a liquid surface. The 'plop' which results from this interaction produces a conical shock wave which is associated with significant rises in pressure, temperature, and velocity in the material behind an interstellar cloud. It is found through a series of calculations that if allowances are made for cooling and the shock speed is near 100 km/s (as in a T Tauri star), a large degree of compression is reached and the material overtaken by the conical shock condenses into a fast moving bullet. The model was compared with three other theoretical models of bullet generation and was found to provide a reasonable explanation for the bullet phenomenon. A diagram describing the reflection of a conical shock wave is provided.
Rozyczka Michal
Tenorio-Tagle Guillermo
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