Spectral line profiles changed by dust scattering in heavily obscured young stellar objects

被引：12

作者：

Grinin, V. P. ^{[1
,2
,3
]}

Tambovtseva, L. V. ^{[1
,3
]}

Weigelt, G. ^{[3
]}

机构：

[1] Russian Acad Sci, Pulkovo Astron Observ, St Petersburg 196140, Russia

[2] St Petersburg State Univ, VV Sobolev Astron Inst, St Petersburg 198904, Russia

[3] Max Planck Inst Radioastron, D-53121 Bonn, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2012年 / 544卷

关键词：

line: profiles; scattering; stars:; winds; outflows; stars: pre-main sequence; T-TAURI STARS; LIGHT; DISKS; WIND; NUCLEI; MODELS;

D O I：

10.1051/0004-6361/201219768

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is known that scattering of radiation by circumstellar dust can strongly change the line profiles in stellar spectra. This hampers the analysis of spectral lines originating in the emitting regions of heavily obscured young stars. To calculate the line profile of the scattered radiation, we suggest to use the approximation of remote scattering particles. This approximation assumes that the scattering dust grains are at a distance from the star that is much larger than the characteristic size of the emitting region. Using this method, we calculated the line profiles of several simple models. They show the Ha line profiles of Herbig AeBe stars in the presence and absence of motionless or moving dust.

引用

页数：5

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