Characterization of X-ray emission from T Tauri Stars

被引：0

作者：

Shukla, Sonali J. ^{[1
]}

Weintrau, David ^{[1
]}

Kastner, Joel ^{[2
]}

Huenemoerder, David ^{[3
]}

Schulz, Norbert ^{[3
]}

Testa, Paola ^{[4
]}

机构：

[1] Vanderbilt Univ, Nashville, TN 37203 USA

[2] Rochester Inst Technol, Rochester, MI USA

[3] MIT, Cambridge, MA 02139 USA

[4] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

来源：

COOL STARS, STELLAR SYSTEMS AND THE SUN | 2009年 / 1094卷

关键词：

Stars: pre-main sequence; X-rays: stars; ACCRETION;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We are analyzing high-resolution Chandra ACIS-S/HETGS long integration spectra for a sample of young stars, including classical, weak-lined, and post-T Tauri stars as well as a young main sequence star. We have identified flaring and quiescent periods, based on overall X-ray luminosity, for several of the stars. We have measured line fluxes in the He-like ions separately in the flaring and quiescent epochs to determine forbidden-to-intercombination line ratios. Results from out analysis of four wTTS and one post-T Tauri star with Chandra/HETGS are included in this presentation. The temperature and density diagnostics for V987 Tau indicate that X-rays are emitted by a cool, high density plasma in the quiescent phase.

引用

页码：333 / +

页数：2