A Lucky Imaging search for stellar sources near 74 transit hosts
作者： Maria Wöllert , Wolfgang Brandner
DOI: 10.1051/0004-6361/201526525
关键词: Light curve 、 Transit (astronomy) 、 Physics 、 Astrophysics 、 Astronomy 、 Lucky imaging 、 Planetary system 、 Exoplanet 、 Planet 、 Stars 、 Stellar mass loss
摘要: Many transiting planet host stars lack high resolution imaging and thus close stellar sources can be missed. Those unknown potentially bias the derivation of planetary parameters from transit light curve, no matter if they are bound or not. In addition, companions interact gravitationally with exoplanet star, disk planets influence formation evolution system strongly. We extended our high-resolution Lucky Imaging survey for by 74 stars. 39 these previous imaging, 23 follow up observations companion candidates, remaining have been observed others AO though in different bands. determine separation all new known candidates estimate flux ratio All were carried out camera AstraLux Norte at Calar Alto 2.2 m telescope i' z' passbands. find within 1 arcsec to HAT-P-27, HAT-P-28, HAT-P-35, WASP-76, WASP-103, between 4 HAT-P-29 WASP-56.
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