= Mark G. Wolfire
{c}
<Mark G. Wolfire> co-authored models of the <cold neutral medium> and <warm neutral medium> within the <interstellar medium>. The analysis calculated the range of <pressure> over which these gas phases can coexist in <thermal equilibrium>.
The pressure range depends on environmental inputs such as the radiation field and composition. Connecting the allowed equilibria to Galactic conditions explains why a single temperature is inadequate for describing much of the neutral interstellar gas, and why <radiative cooling> must be considered together with energy input.<The Neutral Atomic Phases of the ISM in the Galaxy by Mark G. Wolfire and others>[Abstract: pressure limits, dependence on heating and abundances, and the two-phase interpretation]{ref}
\Image[https://www.astro.umd.edu/sites/default/files/styles/square/public/team/Wolfire-Mark.jpg?itok=Qn0Vf9mR]
{title=Portrait of <Mark G. Wolfire>}
{description=External portrait linked from the institutional profile.}
{source=https://www.astro.umd.edu/people/mark-g-wolfire}
{width=240}
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