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2013MNRAS.428..182B - Mon. Not. R. Astron. Soc., 428, 182-189 (2013/January-1)
Stellar companions to exoplanet host stars: Lucky imaging of transiting planet hosts.
BERGFORS C., BRANDNER W., DAEMGEN S., BILLER B., HIPPLER S., JANSON M., KUDRYAVTSEVA N., GEISSLER K., HENNING T. and KOHLER R.
Abstract (from CDS):
We present observations of two previously unknown binary candidate companions, to the transiting planet host stars HAT-P-8 and WASP-12, and derive photometric and astrometric properties of the companion candidates. The common proper motions of the previously discovered companion candidates with the exoplanet host stars TrES-4 and WASP-2 are confirmed from follow-up observations. A Bayesian statistical analysis of 31 transiting exoplanet host stars observed with AstraLux suggests that the companion star fraction of planet hosts is not significantly different from that of solar-type field stars, but that the binary separation is on average larger for planet host stars.
Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)
Journal keyword(s): techniques: high angular resolution - binaries: visual - planetary systems
Nomenclature: NAME Bergfors-6.
Simbad objects: 32
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