371 citations · 5.4k across the 119 of their papers we have counts for
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The CARMENES search for exoplanets around M dwarfs. Variability on long timescales as seen in chromospheric indicators
B. Fuhrmeister, S. Czesla, V. Perdelwitz +19
It is clearly established that the Sun has an 11-year cycle that is caused by its internal magnetic field. This cycle is also observed in a sample of M dwarfs. In the framework of…
Transmission spectroscopy of WASP-7 b with UVES -- Detection of Na I D and tentative D line absorption
Hossein Rahmati, Stefan Czesla, Sara Khalafinejad +1
Transmission spectroscopy is a prime technique to study the chemical composition and structure of exoplanetary atmospheres. Strong excess absorption signals have been detected in t…
Atmospheric characterization of the ultra-hot Jupiter WASP-33b: Detection of Ti and V emission lines and retrieval of a broadened line profile
D. Cont, F. Yan, A. Reiners +17
Ultra-hot Jupiters are highly irradiated gas giant exoplanets on close-in orbits around their host stars. We analyzed high-resolution spectra from CARMENES, HARPS-N, and ESPaDOnS t…
The stellar content of the ROSAT all-sky survey
S. Freund, S. Czesla, J. Robrade +2
We present and apply a method to identify the stellar content of the ROSAT all-sky survey (RASS). We performed a crossmatch between the RASS sources and stellar candidates selected…
The high energy spectrum of Proxima Centauri simultaneously observed at X-ray and FUV wavelengths
B. Fuhrmeister, A. Zisik, P. C. Schneider +6
The M dwarf Proxima~Centauri is known to be magnetically active and it hosts a likely Earth-like planet in its habitable zone. Understanding the characteristics of stellar radiatio…
The CARMENES search for exoplanets around M dwarfs: Benchmarking the impact of activity in high-precision radial velocity measurements
S. V. Jeffers, J. R. Barnes, P. Scheofer +17
Current exoplanet surveys using the radial velocity (RV) technique are targeting M dwarfs because any habitable zone terrestrial-mass planets will induce a high RV and orbit on sho…