\documentstyle{preprint}
\begin{document}
\title{TEMPERATURE FLUCTUATIONS AND STARBURST EVOLUTION}
\author{Enrique P\'erez\/\thanks{Permanent address: Instituto de 
Astrof\'{\i}soca de Andaluc\'{\i}a (CSIC), Aptdo.~3004, 18080 Granada, 
Spain.}\\
\\
Space Telescope Science Institute\\
\\
3700 San Martin Drive\\
\\
Baltimore, MD  21218\\
\\
Email: eperez@stsci.edu, eperez@iaa.es}

\pub{MNRAS}
\recacc{4 November 1996}{18 April 1997}
\maketitle

\begin{abstract}
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 beause 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.
\end{abstract}
\end{document}