title: Stellar stability by thermodynamic instability.
abstract: For gravity-dominated systems the three features shrinking <=> energy decrease <=> temperature increase are dynamically linked together. So are their inverses: expansion <=> energy increase <=> temperature decrease. We exhibit these features by one classical particle in a suitable environment, and by many particles with purely attractive interactions. We then show how the ensuing negative heat capacity tames an explosive energy input.
authors.affiliation: Institut für Experimentalphysik, Universität Wien, Boltzmanngasse 5, A-1090 Wien, Austria. Harald.Posch@univie.ac.at
authors.forename: Harald A
authors.initials: HA
authors.lastname: Posch
authors.forename: Walter
authors.initials: W
authors.lastname: Thirring