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Updated: May 27, 2026

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
Published on: February 3, 2014
The hidden mass and large spatial extent of a post-starburst galaxy outflow
Todd M Tripp1, Joseph D Meiring, J Xavier Prochaska
1Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA. tripp@astro.umass.edu
Abstract:
Outflowing winds of multiphase plasma have been proposed to regulate the buildup of galaxies, but key aspects of these outflows have not been probed with observations. By using ultraviolet absorption spectroscopy, we show that "warm-hot" plasma at 10(5.5) kelvin contains 10 to 150 times more mass than the cold gas in a post-starburst galaxy wind. This wind extends to distances > 68 kiloparsecs, and at least some portion of it will escape. Moreover, the kinematical correlation of the cold and warm-hot phases indicates that the warm-hot plasma is related to the interaction of the cold matter with a hotter (unseen) phase at >>10(6) kelvin. Such multiphase winds can remove substantial masses and alter the evolution of post-starburst galaxies.
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