Observing the linked depletion of dust and CO gas at 0.1-10 au in disks of intermediate-mass stars

被引：26

作者：

Banzatti, A. ^{[1
]}

Garufi, A. ^{[2
]}

Kama, M. ^{[3
,4
,5
]}

Benisty, M. ^{[6
]}

Brittain, S. ^{[7
]}

Pontoppidan, K. M. ^{[8
]}

Rayner, J. ^{[9
]}

机构：

[1] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA

[2] Univ Autonoma Madrid, Dept Fis Teor, Fac Ciencias, Campus Cantoblanco, E-28049 Madrid, Spain

[3] Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[4] Univ Chile, CNRS INSU UMI 3386, Unidad Mixta Int Franco Chilena Astron, Casilla 36-D, Santiago, Chile

[5] Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile

[6] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France

[7] Clemson Univ, Dept Phys & Astron, Kinard Lab 118, Clemson, SC 29634 USA

[8] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[9] Univ Hawaii, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2018年 / 609卷

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

protoplanetary disks; stars: pre-main sequence; stars: variables: T Tauri; Herbig Ae/Be; planets and satellites: formation;

D O I：

10.1051/0004-6361/201732034

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the discovery of correlations between dust and CO gas tracers of the 0.1-10 au region in planet-forming disks around young intermediate-mass stars. The abundance of refractory elements on stellar photospheres decreases as the location of hot CO gas emission recedes to larger disk radii, and as the near-infrared excess emission from hot dust in the inner disk decreases. The linked behavior between these observables demonstrates that the recession of infrared CO emission to larger disk radii traces an inner disk region where dust is being depleted. We also find that Herbig disk cavities have either low (similar to 5-10%) or high (similar to 20-35%) near-infrared excess, a dichotomy that has not been captured by the classic definition of "pre-transitional" disks.

引用

页数：7

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