Starmaking with colliding molecular clouds

Details Starmaking with colliding molecular clouds Starmaking with colliding molecular clouds

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979s%26t....57..521l&link_type=abstract

Sky and Telescope, vol. 57, June 1979, p. 521-526.

Astronomy and Astrophysics

Astrophysics

2

Astrophysics, Clouds, Interstellar Gas, Molecular Gases, Stellar Evolution, Stellar Mass Accretion, Collision Parameters, Gravitational Collapse, Nebulae, Supernovae

Scientific paper

A theory is proposed that stars may be formed by the collision of two molecular clouds. Such a collision would result in an adequate compression to initiate the necessary collapse. Although chances of this occuring are very slight, observations imply that the gaseous nebula NGC 1333, in Perseus, is an example. Cloud shape and velocity are key factors in determining the ability of a collision to produce gravitational clumping. Theoretical models have shown that a collision velocity near that observed for the NGC 1333 region is needed for this to occur. Two possibilities are given for such a collision with the first suggesting that two adjacent clouds of different densities could be accelerated with respect to each other and thus collide and the second involving gas and dust from expanding supernova explosions sweeping up material as they go, which appears to be the case in NGC 1333.

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