期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 433, 期 3, 页码 2097-2106出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stt885
关键词
instrumentation: high angular resolution; methods: observational; planetary systems
资金
- National Aeronautics and Space Administration
- National Science Foundation
- STFC
- Vanderbilt Office of the Provost, through the Vanderbilt Initiative in Data-intensive Astrophysics (VIDA)
- Vanderbilt Office of the Provost through Vanderbilt International Office
- Science and Technology Facilities Council [ST/F00379X/1, ST/K002368/1, ST/I001123/1, ST/I001719/1, ST/K006126/1] Funding Source: researchfish
- STFC [ST/K006126/1, ST/K002368/1, ST/I001719/1, ST/I001123/1, ST/F00379X/1] Funding Source: UKRI
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0909463] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [849736] Funding Source: National Science Foundation
We obtained high-resolution, high-contrast optical imaging in the Sloan Digital Sky Survey i(') band with the LuckyCam camera mounted on the 2.56 m Nordic Optical Telescope, to search for faint stellar companions to 16 stars harbouring transiting exoplanets. The Lucky imaging technique uses very short exposures to obtain near diffraction-limited images yielding sub-arcsecond sensitivity, allowing us to search for faint stellar companions within the seeing disc of the primary planet host. Here, we report the detection of two candidate stellar companions to the planet host TrES-1 at separations < 6.5 arcsec and we confirm stellar companions to CoRoT-2, CoRoT-3, TrES-2, TrES-4 and HAT-P-7 already known in the literature. We do not confirm the candidate companions to HAT-P-8 found via Lucky imaging by Bergfors et al., however, most probably because HAT-P-8 was observed in poor seeing conditions. Our detection sensitivity limits allow us to place constraints on the spectral types and masses of the putative bound companions to the planet host stars in our sample. If bound, the stellar companions identified in this work would provide stringent observational constraints to models of planet formation and evolution. In addition, these companions could affect the derived physical properties of the exoplanets in these systems.
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