Hayashi and the Thermal Physics of Star-Forming Clouds
  This brief historical review highlights the early work of Hayashi and his associates on the thermal physics of star-forming clouds, as summarized in the temperature-density diagrams first presented by this group. Some of the more recent developments in this subject, including its application to understanding stellar masses and to understanding the formation of the first stars, are also briefly reviewed. 
Richard B. Larson
astro-ph.CO