Bibcode
Tenorio-Tagle, G.; Muñoz-Tuñon, C.; Pérez, E.; Silich, S.; Telles, E.
Referencia bibliográfica
Triggered Star Formation in a Turbulent ISM, Edited by B. G. Elmegreen and J. Palous. Proceedings of the International Astronomical Union 2, IAU Symposium #237, held 14-18 August, 2006 in Prague, Czech Republic. Cambridge: Cambridge University Press, 2007., pp.238-241
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2007
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Descripción
We review the structural properties of giant extragalactic HII regions
and HII galaxies based on two dimensional hydrodynamic calculations, and
propose an evolutionary sequence that accounts for their observed
detailed structure. The model assumes a massive and young stellar
cluster surrounded by a large collection of clouds. These are thus
exposed to the most important star-formation feedback mechanisms:
photoionization and the cluster wind. The models show how the two
feedback mechanisms compete with each other in the disruption of clouds
and lead to two different hydrodynamic solutions: The storage of clouds
into a long lasting ragged shell that inhibits the expansion of the
thermalized wind, and the steady filtering of the shocked wind gas
through channels carved within the cloud stratum that results into the
creation of large-scale superbubbles. Both solutions are here claimed to
be concurrently at work in giant HII regions and HII galaxies, causing
their detailed inner structure. A full description of the calculations
can be found in The Astrophysical Journal 643, 186. Animated version of
the models presented can be found at
http://www.iaa.csic.es/~{}eperez/ssc/ssc.html.