Astron. Astrophys. Suppl. Ser. 142, 467-473

A list of data for the broadening of metallic lines by neutral hydrogen collisions

P.S. Barklem¹ - N. Piskunov¹ - B.J. O'Mara²

Send offprint request: P.S. Barklem

1 - Uppsala Astronomical Observatory, Box 515, S 751-20 Uppsala, Sweden
2 - Department of Physics, The University of Queensland, St Lucia 4072, Australia

Received July 20, 1999; accepted January 3, 2000

Abstract:

A list of data for the broadening by neutral hydrogen collisions of many astrophysically important spectral lines, which has been incorporated into the Vienna Atomic Line Database (VALD), is presented. Data for lines of neutral atoms are interpolated from the tabulated data of Anstee & O'Mara ([1995]), Barklem & O'Mara ([1997]), and Barklem et al. ([1998]). Data for lines of singly ionised atoms are compiled from the calculations by Barklem & O'Mara ([1998,2000]). The list at present contains data for 4891 lines between 2300 and 13000 Å of elements from Li to Ni. We examine the statistical impact of the new theory by comparison with the previously available data. We also demonstrate the direct effect on spectral synthesis calculations.

Key words: atomic data -- line: profiles -- astronomical data bases: miscellaneous