The structure and emission of the accretion shock in T Tauri stars. II. The ultraviolet-continuum emission

被引：178

作者：

Gullbring, E ^{[1
]}

Calvet, N

Muzerolle, J

Hartmann, L

机构：

[1] Stockholm Observ, SE-13336 Saltsjobaden, Sweden

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] Ctr Invest Astron, Merida, Venezuela

[4] Univ Massachusetts, Dept Astron, Five Coll, Lederle Grad Res Ctr 640, Amherst, MA 01003 USA

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 544卷 / 02期

关键词：

accretion; accretion disks; circumstellar matter; stars : formation; stars : pre-main-sequence; ultraviolet : stars;

D O I：

10.1086/317253

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We compare accretion-shock models with optical and ultraviolet spectra of pre-main-sequence stars to (1) make the first determinations of accretion rates in intermediate-mass T Tauri stars from continuum emission and (2) derive improved estimates of accretion rates and extinctions for continuum T Tauri stars. Our method extends the shock models developed by Calvet & Gullbring to enable comparisons with optical and archival International Ultraviolet Explorer ultraviolet spectra. We find good agreement between the observations and the model predictions, supporting the basic model of magnetospheric accretion shocks as well as previous determinations of accretion rates and interstellar reddening for the low-mass T Tauri stars. The accretion rates determined for the intermediate-mass T Tauri stars agree well with values obtained through the other methods of Muzerolle and coworkers that use near-infrared hydrogen line strengths.

引用

页码：927 / 932

页数：6

共 28 条

[11] Disk accretion rates for T Tauri stars [J].