Binarity of transit host stars - Implications for planetary parameters

@article{Daemgen2009BinarityOT,
  title={Binarity of transit host stars - Implications for planetary parameters},
  author={S. Daemgen and Felix Hormuth and Wolfgang Brandner and Carolina Bergfors and Markus Janson and Stefan Hippler and Th. Henning},
  journal={Astronomy and Astrophysics},
  year={2009},
  volume={498},
  pages={567-574}
}
Context. Straight-forward derivation of planetary parameters can only be achieved in transiting planetary systems. However, planetary attributes such as radius and mass strongly depend on stellar host parameters. Discovering a transit host star to be multiple leads to a necessary revision of the derived stellar and planetary parameters. Aims. Based on our observations of 14 transiting exoplanet hosts, we derive parameters of the individual components of three transit host stars (WASP-2, TrES-2… 

Figures and Tables from this paper

A Lucky Imaging search for stellar companions to transiting planet host stars
The presence of stellar companions around planet hosting stars influences the architecture of their planetary systems. To find and characterise these companions and determine their orbits is thus an
A multiplicity study of transiting exoplanet host stars
Context. Many main-sequence stars are part of multiple systems. The effect of stellar multiplicity on planet formation and migration, however, is poorly understood. Aims. We study the multiplicity of
Stellar companions to exoplanet host stars: Lucky Imaging of transiting planet hosts
Observed properties of stars and planets in binary/multiple star systems provide clues to planet formation and evolution. We extended our survey for visual stellar companions to the hosts of
High-precision stellar limb-darkening measurements - A transit study of 38 Kepler planetary candidates
Context. Planetary transit light curves are influenced by a variety of fundamental parameters, such as the orbital geometry and the surface brightness distribution of the host star. Stellar limb
Planetary transit timing variations induced by stellar binarity: the light travel time effect
Context. Since the discovery of the first transiting extrasolar planet, transit timing has been recognized as a powerful method to discover and characterize additional planets in these systems.
Homogeneous studies of transiting extrasolar planets – IV. Thirty systems with space-based light curves
I calculate the physical properties of 32 transiting extrasolar planet and brown-dwarf systems from existing photometric observations and measured spectroscopic parameters. The systems studied
A lucky imaging multiplicity study of exoplanet host stars
To understand the influence of additional wide stellar companions on planet formation, it is necessary to determine the fraction of multiple stellar systems amongst the known extrasolar planet
Multiplicity in transiting planet-host stars - A lucky imaging study of Kepler candidates
Context. In the exoplanetary era, the Kepler spacecraft is causing a revolution by discovering thousands of new planet candidates. However, a follow-up program is needed to reject false candidates
Discovery of a stellar companion to the nearby solar-analogue HD 104304
Sun-like stars are promising candidates to host exoplanets and are often included in exoplanet surveys by radial velocity (RV) and direct imaging. In this paper we report on the detection of a
A Lucky Imaging search for stellar sources near 74 transit hosts
Many transiting planet host stars lack high resolution imaging and thus close stellar sources can be missed. Those unknown stars potentially bias the derivation of the planetary and stellar
...
...

References

SHOWING 1-10 OF 37 REFERENCES
Improving Stellar and Planetary Parameters of Transiting Planet Systems: The Case of TrES-2
We report on a spectroscopic determination of the atmospheric parameters and chemical abundance of the parent star of the recently discovered transiting planet TrES-2. A detailed LTE analysis of a
Improved Parameters for Extrasolar Transiting Planets
We present refined values for the physical parameters of transiting exoplanets, based on a self-consistent and uniform analysis of transit light curves and the observable properties of the host
Probing long-period companions to planetary hosts : VLT and CFHT near infrared coronographic imaging surveys
Aims. We present the results of a deep imaging survey of stars surrounded by planets detected with the radial velocity technique. The purpose is to search for and to characterize long-period stellar
The impact of stellar duplicity on planet occurrence and properties. I. Observational results of a V
Context. Although it is commonly agreed that the presence of a close stellar companion is likely to affect planet formation and evolution, the precise effects and their actual impact on planet
Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems
We present results of a reconnaissance for stellar companions to all 131 radial velocity-detected candidate extrasolar planetary systems known as of 2005 July 1. Common proper-motion companions were
Properties of planets in binary systems - The role of binary separation
Aims. The statistical properties of planets in binaries were investigated. Any difference to planets orbiting single stars can shed light on the formation and evolution of planetary systems. As
The Transit Light Curve (TLC) Project. VI. Three Transits of the Exoplanet TrES-2
Of the nearby transiting exoplanets that are amenable to detailed study, TrES-2 is both the most massive and the one with the largest impact parameter. We present z-band photometry of three transits
Timescales of Disk Evolution and Planet Formation: HST, Adaptive Optics, and ISO Observations of Weak-Line and Post-T Tauri Stars
We present high spatial resolution HST and ground-based adaptive optics observations and high-sensitivity ISO (ISOCAM & ISOPHOT) observations of a sample of X-ray selected weak-line (WTTS) and post?
Toward a homogeneous set of transiting planet parameters
Abstract With 40 or more transiting exoplanets now known, the time is ripe to seek patterns and correlations among their observed properties, which may give important insights into planet formation,
A Unique Solution of Planet and Star Parameters from an Extrasolar Planet Transit Light Curve
There is a unique solution of the planet and star parameters from a planet transit light curve with two or more transits if the planet has a circular orbit and the light curve is observed in a
...
...