Time-Dependent Radiative Cooling

Details Time-Dependent Radiative Cooling Time-Dependent Radiative Cooling

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21011308g&link_type=abstract

American Astronomical Society Meeting 210, #113.08; Bulletin of the American Astronomical Society, Vol. 39, p.238

Statistics

Computation

Scientific paper

I will summarize the results described in Gnat & Sternberg 2007 (ApJS, 168, 213), in which we present up-to-date computations of the equilibrium and non-equilibrium ionization states and cooling efficiencies in radiatively cooling gas. We solve the coupled time- dependent ionization and energy loss equations for a radiating gas cooling from an initially hot, >5e6K, equilibrium state, down to 1e4K. We consider gas metallicities between 0.001 and 2 times solar, and cooling at either constant pressure or constant density. We present our computational results in convenient on-line figures and tables (see http://wise-obs.tau.ac.il/ orlyg/cooling/). We demonstrate the impact that departures from equilibrium have on the observed properties of metal-ion absorbers. I will conclude by describing recent computations of the non-equilibrium cooling column densities in steady flows of cooling gas, such as may occur in the post-shock cooling layers of fast shock waves.

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