OBSERVATIONAL CONSTRAINTS ON COMPANIONS INSIDE OF 10 AU IN THE HR 8799 PLANETARY SYSTEM

被引：42
|
作者：
Hinkley, Sasha [1 ]
Carpenter, John M. [1 ]
Ireland, Michael J. [2 ]
Kraus, Adam L. [3 ]
机构：
[1] CALTECH, Dept Astron, Pasadena, CA 91125 USA
[2] Univ Sydney, Sydney Inst Astron SIfA, Sch Phys, Sydney, NSW 2006, Australia
[3] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2011年 / 730卷 / 02期
基金：
澳大利亚研究理事会;
关键词：
instrumentation: adaptive optics; instrumentation: interferometers; planets and satellites: detection; stars: individual (HR 8799); techniques: high angular resolution; APERTURE-MASKING EXPERIMENT; GIANT PLANETS; DEBRIS DISK; ADAPTIVE OPTICS; BROWN DWARFS; COKU TAURI/4; STARS; INTERFEROMETRY; SCATTERING; MASSES;
D O I：
10.1088/2041-8205/730/2/L21
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report the results of Keck L'-band non-redundant aperture masking of HR 8799, a system with four confirmed planetary mass companions at projected orbital separations of 14-68 AU. We use these observations to place constraints on the presence of planets and brown dwarfs at projected orbital separations inside of 10 AU-separations out of reach to more conventional direct imaging methods. No companions were detected at better than 99% confidence between orbital separations of 0.8 and 10 AU. Assuming an age of 30 Myr and adopting the Baraffe models, we place upper limits to planetary mass companions of 80, 60, and 11 M-Jup at projected orbital separations of 0.8, 1, and 3-10 AU, respectively. Our constraints on massive companions to HR 8799 will help clarify ongoing studies of the orbital stability of this multi-planet system, and may illuminate future work dedicated to understanding the dust-free hole interior to similar to 6 AU.
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页数：5
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