CaltechAUTHORS
Published March 2012 | Version Published + Submitted
Journal Article Open

Ion-By-Ion Cooling Efficiencies

Creators

  • 1. ROR icon California Institute of Technology
  • 2. ROR icon Hebrew University of Jerusalem
  • 3. ROR icon University of Kentucky

Abstract

We present ion-by-ion cooling efficiencies for low-density gas. We use Cloudy (version 10.00) to estimate the cooling efficiencies for each ion of the first 30 elements (H-Zn) individually. We present results for gas temperatures between 10^4 and 10^8 K, assuming low densities and optically thin conditions. When nonequilibrium ionization plays a significant role the ionization states deviate from those that obtain in collisional ionization equilibrium (CIE), and the local cooling efficiency at any given temperature depends on specific nonequilibrium ion fractions. The results presented here allow for an efficient estimate of the total cooling efficiency for any ionic composition. We also list the elemental cooling efficiencies assuming CIE conditions. These can be used to construct CIE cooling efficiencies for non-solar abundance ratios or to estimate the cooling due to elements not included in any nonequilibrium computation. All the computational results are listed in convenient online tables.

Additional Information

© 2012 American Astronomical Society. Received 2010 October 11; accepted 2012 January 4; published 2012 March 1. O.G. was supported by NASA through Chandra Postdoctoral Fellowship grant PF8-90053 awarded by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for NASA under contract NAS8-03060. Partial financial support for G.J.F's work on this project was provided by National Science Foundation grants AST 0908877 and AST 0607028, National Aeronautics and Space Administration grant 07-ATFP07-0124, and HST Theory grant AR 12125.01.

Attached Files

Published - Gnat2012p17608Astrophys_J_Suppl_S.pdf

Submitted - 1111.6980v1.pdf

Files

1111.6980v1.pdf

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Additional details

Identifiers

Eprint ID
29944
Resolver ID
CaltechAUTHORS:20120403-075501406

Related works

Describes
http://arxiv.org/abs/1111.6980 (URL)

Funding

NASA Chandra Postdoctoral Fellowship
PF8-90053
NASA
NAS8-03060
NSF
AST 0908877
NSF
AST 0607028
NASA
07-ATFP07-0124
HST Theory Grant
AR 12125.01

Dates

Created
2012-04-03
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field