Magnetic Field Measurements on the Classical T Tauri Star BP Tauri

被引：0

作者：

Chen, Wei ^{[1
]}

Johns-Krull, Christopher M. ^{[1
]}

机构：

[1] Rice Univ, Phys & Astron Dept, 6100 Main St,MS 108, Houston, TX 77005 USA

来源：

16TH CAMBRIDGE WORKSHOP ON COOL STARS, STELLAR SYSTEMS AND THE SUN | 2012年 / 448卷

关键词：

MAGNETOSPHERIC ACCRETION; TELESCOPE; SEARCH; FLOWS; AP;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We apply our newly developed least-squares deconvolution (LSD) code to several solar-like stars as tests of the code and to 6 nights of observations of BP Tau to measure the mean longitudinal magnetic field on the stellar surface. Null results or weak fields are detected on the solar-like stars as is expected, while a maximum of 180 +/- 30 G is detected from the photospheric lines of BP Tau. A 400 G dipole tilted at 113 degrees with respect to the rotation axis fits our photospheric measurements well. Measurements of several emision lines (He 1 5876 angstrom, Ca II 8498 angstrom and 8542 angstrom) show the presence of strong magnetic fields in the line formation regions, which are believed to be the base of the accretion footpoints.

引用

页码：285 / 292

页数：8

共 24 条

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