POSTER PAPER 11.01
Broadening of Spectral Lines by Collisions with H-atoms
B. J. O'Mara, P. S. Barklem
Institute: Department of Physics, University of Queensland, Australia
Institute: Department of Astronomy and Space Physics, Uppsala University, Sweden
Contact Email: omara@physics.uq.edu.au
Abstract:
Pressure broadening of metallic lines in cool stars is dominated by collisions with hydrogen atoms. A universal theory for broadening of neutral metallic lines by this mechanism developed by Anstee, Barklem, and O'Mara is briefly reviewed. Several examples of successful application of the data are presented and future applications discussed. Line broadening data from this theory for a large sample of lines can be obtained by accessing the Vienna Atomic Line Database (www.astro.univie.ac.at/~vald) or for individual lines by using software available at www.astro.se/~barklem.
Index Keywords: Line Broadening
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Manuscript submitted: 2001-Sep-05
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.