Radiation-driven collapse of autogravitating neutral clumps

Details Radiation-driven collapse of autogravitating neutral clumps Radiation-driven collapse of autogravitating neutral clumps

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007mnras.377..383e&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 377, Issue 1, pp. 383-390.

Astronomy and Astrophysics

Astronomy

10

Stars: Formation, Ism: Clouds, Hii Regions, Ism: Kinematics And Dynamics

Scientific paper

We present three-dimensional (3D) simulations of the interaction of autogravitating neutral clumps with an external ionizing radiation field. We used gas-dynamics simulations that included self-gravity and the divergence of the radiation from the source. We show that as a spherical neutral clump is being photoevaporated, a compressive shock is established, the shape of which depends upon the distance to the source. For a clump with small density perturbations, we found evidence of further fragmentation when the photon source is placed very near to the clump. We also found that self-gravity has a secondary role unless very high densities are achieved by the initial radiation-driven compression.

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