Dynamics of Molecular Clouds Under the Influence of Ionizing Radiation from Young Massive Stars

Details Dynamics of Molecular Clouds Under the Influence of Ionizing Radiation from Young Massive Stars Dynamics of Molecular Clouds Under the Influence of Ionizing Radiation from Young Massive Stars

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002rmxac..12...25k&link_type=abstract

Ionized Gaseous Nebulae, a Conference to Celebrate the 60th Birthdays of Silvia Torres-Peimbert and Manuel Peimbert, Mexico City

Astronomy and Astrophysics

Astronomy

Hii Regions, Hydrodynamics, Stars: Early-Type

Scientific paper

We present numerical simulations treating the ra-di-a-tive dri-ven implosion of density enhancements in molecular cloud cores under the influence of ionizing radiation from massive stars. We performed SPH calculations with initial density perturbations described by Gaussian random fields. We found that large scale perturbations with index -3 in their power spectrum cannot prevent gravitational collapse in the compressed cloud cores, whereas small scale perturbations (power index -1) can at least delay the onset of gravitational instability for a significant fraction of the compression time.

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