Far Ultraviolet Spectroscopic Explorer observations of G226-29:: First detection of the H2 quasi-molecular satellite at 1150 Å

被引：15

作者：

Allard, NF

Hébrard, G

Dupuis, J

Chayer, P

Kruk, JW

Kielkopf, J

Hubeny, I

机构：

[1] Inst Astrophys, CNRS, F-75014 Paris, France

[2] Observ Paris, LERMA, F-92195 Meudon, France

[3] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[4] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 3P6, Canada

[5] Univ Louisville, Dept Phys, Louisville, KY 40292 USA

[6] Natl Opt Astron Observ, Tucson, AZ 85726 USA

来源：

ASTROPHYSICAL JOURNAL | 2004年 / 601卷 / 02期

关键词：

line : profiles; stars : atmospheres; stars : individual (G226-29); ultraviolet : stars; white dwarfs;

D O I：

10.1086/382153

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present new far-ultraviolet observations of the pulsating DA white dwarf G226-29 obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE). This ZZ Ceti star is the brightest one of its class and the coolest white dwarf observed by FUSE. We report the first detection of the broad quasi-molecular collision-induced satellite of Lybeta at 1150 Angstrom, an absorption feature that is due to transitions that take place during close collisions of hydrogen atoms. The physical interpretation of this feature is based on recent progress of the line-broadening theory of the far wing of Lybeta. This predicted feature had never been observed before, even in laboratory spectra.

引用

页码：L183 / L186

页数：4

共 44 条

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