Computer Science
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993egte.conf..155j&link_type=abstract
In NASA. Ames Research Center, The Evolution of Galaxies and Their Environment p 155-156 (SEE N93-26706 10-90)
Computer Science
1
Galactic Evolution, Interacting Galaxies, Massive Stars, Overpressure, Spiral Galaxies, Star Formation, High Pressure, Interstellar Matter, Molecular Clouds, Shock Loads, Stellar Luminosity
Scientific paper
A triggering mechanism for the origin of enhanced, massive-star formation in the central regions of interacting spiral galaxy pairs is proposed. Our mechanism is based on the detailed evolution of a realistic interstellar medium in a galaxy following an encounter. As a disk giant molecular cloud (GMC) tumbles into the central region following a galaxy encounter, it undergoes a radiative shock compression via the pre-existing high pressure of the central intercloud medium. The shocked outer shell of a GMC becomes gravitationally unstable and begins to fragment thus resulting in a burst of star formation, when the growth time for the gravitational instabilities in the shell becomes smaller than the crossing time of the shock. The resulting values of typical infrared luminosity agree with observations.
Das Mousumi
Jog Chanda J.
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