ADAPTIVE OPTICS IMAGES OF KEPLER OBJECTS OF INTEREST

被引：96

作者：

Adams, E. R. ^{[1
]}

Ciardi, D. R. ^{[2
]}

Dupree, A. K. ^{[1
]}

Gautier, T. N., III ^{[3
]}

Kulesa, C. ^{[4
]}

McCarthy, D. ^{[4
]}

机构：

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

[2] NASA, Exoplanet Sci Inst, Pasadena, CA 91125 USA

[3] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[4] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

来源：

ASTRONOMICAL JOURNAL | 2012年 / 144卷 / 02期

关键词：

binaries: general; instrumentation: adaptive optics; planets and satellites: detection; PLANET CANDIDATES; MULTIPLE SYSTEM; STAR; CAMERA;

D O I：

10.1088/0004-6256/144/2/42

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

All transiting planets are at risk of contamination by blends with nearby, unresolved stars. Blends dilute the transit signal, causing the planet to appear smaller than it really is, or produce a false-positive detection when the target star is blended with eclipsing binary stars. This paper reports on high spatial-resolution adaptive optics images of 90 Kepler planetary candidates. Companion stars are detected as close as 0.'' 1 from the target star. Images were taken in the near-infrared (J and Ks bands) with ARIES on the MMT and PHARO on the Palomar Hale 200 inch telescope. Most objects (60%) have at least one star within 6 '' separation and a magnitude difference of 9. Eighteen objects (20%) have at least one companion within 2 '' of the target star; six companions (7%) are closer than 0.'' 5. Most of these companions were previously unknown, and the associated planetary candidates should receive additional scrutiny. Limits are placed on the presence of additional companions for every system observed, which can be used to validate planets statistically using the BLENDER method. Validation is particularly critical for low-mass, potentially Earth-like worlds, which are not detectable with current-generation radial velocity techniques. High-resolution images are thus a crucial component of any transit follow-up program.

引用

页数：8

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