227 citations · 648 across the 10 of their papers we have counts for
10 papers
Discovery of the secondary eclipse of HAT-P-11 b
K. F. Huber, S. Czesla, J. H. M. M. Schmitt
We report the detection of the secondary eclipse of HAT-P-11 b, a Neptune-sized planet orbiting an active K4 dwarf. Using all available short-cadence data of the Kepler mission, we…
How do starspots influence the transit timing variations of exoplanets? Simulations of individual and consecutive transits
P. Ioannidis, K. F. Huber, J. H. M. M. Schmitt
Transit timing variations (TTVs) of exoplanets are normally interpreted as the consequence of gravitational interaction with additional bodies in the system. However, TTVs can also…
A multiwavelength study of the hierarchical triple HD 181068: A test bed for studying star-planet-interaction?
S. Czesla, K. F. Huber, P. C. Schneider +1
HD 181068 is the only compact, triply eclipsing, hierarchical triple system containing a giant star known to date. With its central, highly-active G-type giant orbited by a close p…
The corona and companion of CoRoT-2A. Insights from X-rays and optical spectroscopy
S. Schröter, S. Czesla, U. Wolter +3
CoRoT-2 is one of the most unusual planetary systems known to date. Its host star is exceptionally active, showing a pronounced, regular pattern of optical variability caused by ma…
Planetary eclipse mapping of CoRoT-2a. Evolution, differential rotation, and spot migration
K. F. Huber, S. Czesla, U. Wolter +1
The lightcurve of CoRoT-2 shows substantial rotational modulation and deformations of the planet's transit profiles caused by starspots. We consistently model the entire lightcurve…
A planetary eclipse map of CoRoT-2a. Comprehensive lightcurve modeling combining rotational-modulation and transits
K. F. Huber, S. Czesla, U. Wolter +1
We analyze the surface structure of the planet host star CoRoT-2a using a consistent model for both the `global' (i.e., rotationally modulated) lightcurve and the transit lightcurv…
Detecting Planets Around Very Low Mass Stars with the Radial Velocity Method
A. Reiners, J. L. Bean, K. F. Huber +3
The detection of planets around very low-mass stars with the radial velocity method is hampered by the fact that these stars are very faint at optical wavelengths where the most hi…
Transit mapping of a starspot on CoRoT-2 - Probing a stellar surface by planetary transits
U. Wolter, J. H. M. M. Schmitt, K. F. Huber +4
We analyze variations in the transit lightcurves of CoRoT-2b, a massive hot Jupiter orbiting a highly active G star. We use one transit lightcurve to eclipse-map a photospheric spo…
How stellar activity affects the size estimates of extrasolar planets
S. Czesla, K. F. Huber, U. Wolter +2
Lightcurves have long been used to study stellar activity and have more recently become a major tool in the field of exoplanet research. We discuss the various ways in which stella…
Long-term stability of spotted regions and the activity-induced Rossiter-McLaughlin effect on V889 Herculis. A synergy of photometry, radial velocity measurements, and Doppler imaging
K. F. Huber, U. Wolter, S. Czesla +4
The young active G-dwarf star V889 Herculis (HD 171488) shows pronounced spots in Doppler images as well as large variations in photometry and radial velocity (RV) measurements. Ho…