O'Mara, Bernard James

Contact Email: omara@physics.uq.edu.au
Institute: Institute;The University of Queensland, St Lucia 4072,
Australia
First Coauthor: Paul S Barklem
Institute: Institute;Uppsala Astronomical Observatory, Box 515, S 751
20 Uppsala, Sweden
Subject Area: Atomic Data for Astrophysics
Waveband: Optical
Technique: Computational Astrophysics
Presentation: Poster Display
Title: Broadening of spectral lines by collisions with H-atoms
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 VALD or for individual lines by using software available at BARKLEM.