67 citations · 229 across the 11 of their papers we have counts for
11 papers
The study on transiting systems HAT-P-13, HAT-P-16 and WASP-32 through combining ground-based and TESS photometry
L. Sun, S. Gu, X. Wang +3
High-precision transit photometry supplies ideal opportunities for detecting new exoplanets and characterizing their physical properties, which usually encode valuable information…
An investigation of the magnetic activity of HD 134319 based on TESS photometry and ground-based spectroscopy
Fukun Xu, Shenghong Gu, Panogiotis Ioannidis
We present analysis of the starspot properties and chromospheric activity on HD 134319 using high precision photometry by TESS in sectors 14-16 (T1), 21-23 (T2) and high-resolution…
Simultaneous eROSITA and TESS observations of the ultra-active star AB~Doradus
J. H. M. M. Schmitt, P. Ioannidis, J. Robradel +3
We present simultaneous multiwavelength observations of the ultra-active star AB~Doradus obtained in the X-ray range with the eROSITA instrument on board the Russian--German Spectr…
Keeping up with the cool stars: One TESS year in the life of AB Doradus
P. Ioannidis, J. H. M. M. Schmitt
The long-term, high precision photometry delivered by the Transiting Exoplanet Survey Satellite (TESS) enables us to gain new insight into known and hitherto well-studied stars. In…
Starspot evolution, Differential Rotation and Correlation between Chromospheric and Photospheric Activities on Kepler-411
Fukun Xu, Shenghong Gu, Panogiotis Ioannidis
We present an analysis of the starspot evolution, the surface differential rotation (SDR), the correlation between chromospheric activity indicators and the spatial connection betw…
Kepler-411: a four-planet system with an active host star
Leilei Sun, P. Ioannidis, Shenghong Gu +3
We present a detailed characterization of the Kepler-411 system (KOI 1781). This system was previously known to host two transiting planets: one with a period of 3 days ($R=2.4R_\o…
Glimpses of stellar surfaces. II. Origins of the photometric modulations and timing variations of KOI-1452
P. Ioannidis, J. H. M. M. Schmitt
The deviations of the mid-transit times of an exoplanet from a linear ephemeris are usually the result of gravitational interactions with other bodies in the system. However, these…
Glimpses of stellar surfaces. I. Spot evolution and differential rotation of the planet host star Kepler-210
P. Ioannidis, J. H. M. M. Schmitt
We use high accuracy photometric data obtained with the Kepler satellite to monitor the activity modulations of the Kepler-210 planet host star over a time span of more than four y…
Survival of the impactor during hypervelocity collisions I: An analogue for low porosity targets
C. Avdellidou, M. C. Price, M. Delbo +2
Recent observations of asteroidal surfaces indicate the presence of materials that do not match the bulk lithology of the body. A possible explanation for the presence of these exo…
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…
Kepler-210: An active star with at least two planets
P. Ioannidis, J. H. M. M. Schmitt, Ch. Avdellidou +2
We report the detection and characterization of two short-period, Neptune-sized planets around the active host star Kepler-210. The host star's parameters derived from those planet…