Testing Opacities Using the SED Variability of Chemically Peculiar Stars

被引：0

作者：

Krticka, J. ^{[1
]}

Huang, L. ^{[2
]}

Lueftinger, T. ^{[3
]}

Mikulasek, Z. ^{[1
]}

Niemczura, E. ^{[4
]}

Prvak, M. ^{[1
]}

Silvester, J. ^{[5
]}

Wade, G. ^{[2
]}

Zverko, J. ^{[6
]}

机构：

[1] Masaryk Univ, Dept Theoret Phys & Astrophys, CZ-61137 Brno, Czech Republic

[2] Royal Mil Coll Canada, Dept Phys, Stn Forces, POB 17000, Kingston, ON K7K 7B4, Canada

[3] Univ Wien, Inst Astron, A-1180 Vienna, Austria

[4] Wroclaw Univ, Astron Inst, PL-51622 Wroclaw, Poland

[5] Uppsala Univ, Dept Astron & Space Phys, SE-75120 Uppsala, Sweden

[6] Tatranska Lomnica 133, SK-05960 Vysoke Tatry, Slovakia

来源：

WORKSHOP ON ASTROPHYSICAL OPACITIES | 2018年 / 515卷

关键词：

AP STARS; SI;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Opacity variations across stellar surfaces are the key process producing the spectral energy distribution (SED) variability in chemically peculiar (CP) stars. The opacity variations are caused by the presence of surface spots with enhanced (or depleted) abundances of chemical elements. Simulations of the SED variability of chemically peculiar stars with abundances derived from Doppler mapping provide a detailed test of the continuum (bound free) and line opacities in the model atmospheres. The effect of opacities on the SED is most pronounced in the ultraviolet region. We simulate the ultraviolet and visual SED variability of selected chemically peculiar stars using model atmospheres calculated for actual surface abundances, and compare the predicted SEDs with observational results. We show that the simulations can reliably predict the observed SED and its variability as long as complete bound free and bound bound opacities are used. Therefore, the variability of chemically peculiar stars may serve as a test of opacities included in model atmospheres.

引用

页码：195 / 200

页数：6

共 29 条

[21] A plethora of new, magnetic chemically peculiar stars from LAMOST DR4
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Paunzen, E.
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[22] The (non-)variability of magnetic chemically peculiar candidates in the Large Magellanic Cloud
Paunzen, E.
Mikulasek, Z.
Poleski, R.
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Netopil, M.
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[23] Detection of magnetic fields in chemically peculiar stars observed with the K2 space mission
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Neiner, C.
Martin, A. J.
Aerts, C.
Bowman, D. M.
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[24] Magnetic chemically peculiar stars: Results of CCD magnetic field measurements with the 6-m telescope
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[28] Magnetic fields of chemically peculiar and related stars. I. Main results of 2014 and near-future prospects
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[29] Origin and Evolution of Large-Scale Magnetic Fields of Chemically Peculiar Stars. I. Intermediate-Age Clusters
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