Conditions for Formation of the Helium HeI 10830 Å Line in The Disk and Magnetospheric Winds of Young Herbig Ae Stars

被引：0
|
作者：
Ermolaeva, T. A. [1 ]
机构：
[1] St Petersburg State Univ, RAN, Main Pulkovo Astron Observ, St Petersburg, Russia
来源：
ASTROPHYSICS | 2019年 / 62卷 / 04期
关键词：
young stars; Herbig Ae stars; disk wind; magnetospheric wind; T-TAURI STARS; X-RAY-EMISSION; AE/BE STARS; ACCRETION; MODELS;
D O I：
10.1007/s10511-019-09599-y
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The conditions for formation of helium lines in the disk and magnetospheric winds of Herbig Ae stars are studied. The program package CLOUDY is used to solve this problem. It is shown that the optical thickness of the gas in the HeI 10830 angstrom line needed to explain the observed P Cyg profiles is reached in the disk or magnetospheric winds of Herbig Ae stars for T-e >= 10000 K. Here the x-ray emission produced at the surface and in the vicinity of a young star is the main ionization source for helium atoms.
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页码：502 / 512
页数：11
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