The modification by diffuse radiation of ``cometary tail'' formation behind globules

Details The modification by diffuse radiation of ``cometary tail'' formation behind globules The modification by diffuse radiation of ``cometary tail'' formation behind globules

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...369..263p&link_type=abstract

Astronomy and Astrophysics, v.369, p.263-268 (2001)

Astronomy and Astrophysics

Astrophysics

20

Interstellar Medium: Clouds, Interstellar Medium: H Ii Regions, Kinematics And Dynamics, Hydrodynamics

Scientific paper

We study the evolution of a globule of neutral material immersed in the more tenuous hotter plasma of an H ii region surrounding newly born OB stars. The neutral globule is illuminated by the direct ionizing radiation of OB stars, and by diffuse radiation emitted by recombination in the surrounding ionized gas. We perform 2D, time dependent axisymmetric hydrodynamic simulations, and find that, for values of the diffuse field of the order of 10% of the direct field, the evolution of the globule is completely different to its evolution when the diffuse field is neglected.

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