Temperature dependence of sodium and ionized calcium resonance lines perturbed by helium

被引：6

作者：

Allard, N. F. ^{[1
,2
]}

Homeier, D. ^{[3
]}

Guillon, G. ^{[4
]}

Viel, A. ^{[5
]}

Kielkopf, J. ^{[6
]}

机构：

[1] Observ Paris, CNRS, GEPI, UMR8111, 61 Ave Observ, F-75014 Paris, France

[2] Univ Paris 06, CNRS, Inst Astrophys, F-75014 Paris, France

[3] Univ Lyon, UMR 5574 CNRS, Ctr Rech Astrophys Lyon, Ecole Normale Super Lyon, F-6936407 Lyon, France

[4] Univ Bourgogne, CNRS, Lab Interdisciplinaire Carnot Bourgogne, UMR 6303, F-21078 Dijon, France

[5] Univ Rennes, Inst Phys Rennes, F-35042 Rennes, France

[6] Univ Louisville, Dept Phys & Astron, Louisville, KY 40292 USA

来源：

XXII INTERNATIONAL CONFERENCE ON SPECTRAL LINE SHAPES (ICSLS 2014) | 2014年 / 548卷

关键词：

WHITE-DWARFS; SPECTRA; SHAPE;

D O I：

10.1088/1742-6596/548/1/012006

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Traces of heavy metals in cool DZ white dwarf stars may be attributed to the accretion of circumstellar dust thought to originate from tidal disruption of rocky parent bodies. Spectra of such stars therefore provide a unique opportunity to study the composition of extra-solar planetary systems. The determination of metal abundances from stellar spectra depends on stellar atmospheric parameters and an accurate prior knowledge of the collision broadening of the line profiles by the most common constituents of the stellar atmosphere. For this purpose, we present theoretical absorption spectra of Na and Ca+ broadened by He for the conditions prevailing in cool white dwarfs.

引用

页数：5

共 12 条

[1] THE EFFECT OF NEUTRAL NON-RESONANT COLLISIONS ON ATOMIC SPECTRAL-LINES [J].