X-rays from accretion shocks in T Tauri stars: the case of BP Tau

被引：87

作者：

Schmitt, JHMM

Robrade, J

Ness, JU

Favata, F

Stelzer, B

机构：

[1] Hamburger Sternwarte, D-21029 Hamburg, Germany

[2] Univ Oxford, Dept Theoret Phys, Oxford OX1 3NP, England

[3] European Space Agcy, ESTEC, Div Astrophys, NL-2200 AG Noordwijk, Netherlands

[4] Univ Palermo, Dipartimento Sci Fis & Astron, I-90134 Palermo, Italy

来源：

ASTRONOMY & ASTROPHYSICS | 2005年 / 432卷 / 02期

关键词：

X-rays : stars; stars : individual : BP Tau; stars : pre-main sequence; coronae; activity; accretion;

D O I：

10.1051/0004-6361:200500014

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an XMM-Newton observation of the classical T Tauri star BP Tau. In the XMM-Newton RGS spectrum the O VII triplet is clearly detected with a very weak forbidden line indicating high plasma densities and/or a high UV flux environment. At the same time concurrent UV data point to a small hot spot filling factor suggesting an accretion funnel shock as the site of the X-ray and UV emission. Together with the X-ray data on TW Hya these new observations suggest such funnels to be a general feature in classical T Tauri stars.

引用

页码：L35 / L38

页数：4

共 23 条

[1] The Balmer wavelength range of BP Tauri [J].