Analysis of Chandra-LETG spectra of two DA white dwarfs and a PG 1159 star

被引：0

作者：

Adamczak, J. ^{[1
]}

Werner, K. ^{[1
]}

Rauch, T. ^{[1
]}

Schuh, S. ^{[2
]}

Drake, J. J. ^{[3
]}

Kruk, J. W. ^{[4
]}

机构：

[1] Univ Tubingen, Inst Astron & Astrophys, Kepler Ctr Astro & Particle Phys, D-72076 Tubingen, Germany

[2] Univ Gottingen, Gottingen, Germany

[3] Harvard Smithsonian Ctr Astrophys, Cambridge, MA USA

[4] NASA, Goddard Space Flight Ctr, Washington, DC USA

来源：

17TH EUROPEAN WHITE DWARF WORKSHOP | 2010年 / 1273卷

关键词：

White dwarfs; Stars: Individual: LB 1919; GD; 246; Chandra; X-ray spectroscopy; PG; 1159; stars; Individual Objects: PG 1520+525; ABUNDANCES;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results of model-atmosphere analyses of soft X-ray spectra of three hot WDs. These are the relatively iron-rich DA GD246, the surprisingly metal-poor DA LB 1919, and the H-deficient PG1159-type star PG1520+525. The two DAs are modeled with chemically stratified and with homogeneous NLTE models in order to constrain metal abundances. FUSE and HST spectra are also employed. For the PG 1159 star the effective temperature can be constrained to a precision that is not attained with optical and UV spectroscopy alone.

引用

页码：406 / 411

页数：6

共 13 条

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