期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 423, 期 1, 页码 L16-L20出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1745-3933.2012.01242.x
关键词
techniques: interferometric; planets and satellites: individual: Kepler-2lb; stars: individual: HD 179070
资金
- NASA
- National Science Foundation [AST-0606958]
- Georgia State University through the College of Arts and Sciences
- W. M. Keck Foundation
We present long-baseline interferometry of the Kepler exoplanet host star HD 179070 (Kepler-21) using the Precision Astronomical Visible Observations (PAVO) beam combiner at the Center for High Angular Resolution Astronomy (CHARA) Array. The visibility data are consistent with a single star and exclude stellar companions at separations similar to 11000 mas (similar to 0.1113 au) and contrasts <3.5 mag. This result supports the validation of the 1.6 R ? exoplanet Kepler-21b by Howell et al. and complements the constraints set by adaptive optics imaging, speckle interferometry and radial-velocity observations to rule out false positives due to stellar companions. We conclude that long-baseline interferometry has strong potential to validate transiting extrasolar planets, particularly for future projects aimed at brighter stars and for host stars where radial-velocity follow-up is not available.
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