Spatially resolving the inner disk of TW Hydrae

被引：72

作者：

Eisner, JA

Chiang, EI

Hillenbrand, LA

机构：

[1] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[2] CALTECH, Dept Astron, Pasadena, CA 91125 USA

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 637卷 / 02期

基金：

美国国家航空航天局;

关键词：

planetary systems : protoplanetary disks; stars : individual (TW Hydrae); stars : pre-main-sequence;

D O I：

10.1086/500689

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present Keck Interferometer observations of TW Hya that spatially resolve its emission at 2 mm wavelength. Analyzing these data together with existing K-band veiling and near-infrared photometric measurements, we conclude that the inner disk consists of optically thin, submicron-sized dust extending from similar to 4 AU to within 0.06 AU of the central star. The inner disk edge may be magnetospherically truncated. Even if we account for the presence of gas in the inner disk, these small dust grains have survival times against radiation blowout that are orders of magnitude shorter than the age of the system, suggesting continual replenishment through collisions of larger bodies.

引用

页码：L133 / L136

页数：4

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