Temperature fluctuations and starburst evolution

Details Temperature fluctuations and starburst evolution Temperature fluctuations and starburst evolution

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.290..465p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 290, Issue 3, pp. 465-470.

Astronomy and Astrophysics

Astronomy

27

Ism: Abundances: H Ii Regions, Planetary Nebulae: General, Galaxies: Abundances, Galaxies: Starburst

Scientific paper

The understanding of temperature fluctuations in ionized nebulae is a key problem in the computation of chemical abundances, which bears on a variety of fundamental issues in astronomy. Although the problem was stated three decades ago, its impact on the values of the abundances remains challenged, mainly because it is an ill-defined one from the observational point of view. In this work we investigate the change of the ionization structure during the first 7 Myr of the evolution of a starburst. We show that large temperature fluctuations arise naturally when the spectral energy distribution of the ionizing cluster hardens during the Wolf-Rayet phase.

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