Structure and conditions in massive star forming giant molecular clouds

Details Structure and conditions in massive star forming giant molecular clouds Structure and conditions in massive star forming giant molecular clouds

2001-05-21

arxiv.org/abs/astro-ph/0105367v1

Astronomy and Astrophysics

Astrophysics

3 page conference proceedings (IAU General Assembly, Manchester, August 2000)

Scientific paper

Massive stars form in clusters within self-gravitating molecular clouds. The size scale of these clusters is sufficiently large that non-thermal, or turbulent, motions of the gas must be taken into account when considering their formation. Millimeter wavelength radio observations of the gas and dust in these clouds reveal a complex, self-similar structure that reflects the turbulent nature of the gas. Differences are seen, however, towards dense bound cores in proto-clusters. Examination of the kinematics of gas around such cores suggests that dissipation of turbulence may be the first step in the star formation process. Newly formed stars, on the other hand, replenish turbulence through their winds and outflows. In this way, star formation may be self-regulated. Observations and simulations are beginning to demonstrate the key role that cloud turbulence plays in the formation and evolution of stellar groups.

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