Stark Broadening and White Dwarfs

Dimitrijevic, Milan S and Kovacevic, Andjelka B and Simic, Zoran J and Sahal-Brechot, S (2011) Stark Broadening and White Dwarfs. Baltic Astronomy, 20 (4). pp. 495-502. ISSN 1392-0049 (FP7- 239108)

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Abstract

White dwarf and pre-white dwarf atmospheres are one of the best examples for the application of Stark broadening research results in astrophysics, due to plasma conditions very favorable for this line broadening mechanism. For example in hot hydrogen-deficient (pre-) white dwarf stars Teff = 75 000 K - 180 000 K and log g = 5.5-8 [cgs]. Even for much cooler DA and DB white dwarfs with typical effective temperatures of 10 000 K - 20 000 K, Stark broadening is usually the dominant broadening mechanism. In this review, Stark broadening in white dwarf spectra is considered and the attention is drawn to the STARK-B database (http://stark-b.obspm.fr/), containing Stark broadening parameters needed for white dwarf spectra analysis and synthesis, as well as to the new search facilities which will provide the collective effort to develop Virtual Atomic and Molecular Data Center (VAMDC - http://vamdc.org/).

Keywords

stars: white dwarfs; Stark broadening, line profiles; databases

Item Type:	Article
FP7 Grant Agreement Number:	239108
FrameWork Programmes:	SP4-Capacities
Scientific Areas:	Research Infrastructures
Last Modified:	07 Aug 2012 07:29
Access rights:	Open access
URI:	http://eprints.kobson.nb.rs/id/eprint/23

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