Photoionization and Star Formation

Details Photoionization and Star Formation Photoionization and Star Formation

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..15..149f&link_type=abstract

Winds, Bubbles, and Explosions: a conference to honor John Dyson, Pátzcuaro, Michoacán, México, September 9-13, 2002 (Eds. S. J.

Astronomy and Astrophysics

Astronomy

Galaxies: Ism, H Ii Regions, Stars: Formation

Scientific paper

Photoionization by massive stars creates expanding H II regions, which eventually evaporate most of the gas in a star-forming molecular cloud. This is a very efficient cloud destruction mechanism that can also control the maximum number of stars that are formed within a molecular cloud. The resulting star-formation efficiency at low galactic pressures has an overall value of about 5%, but this efficiency value can increase above 50% in the inner regions of star-forming galaxies.

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