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Detection and characterization of an ultra-dense sub-Neptune planet orbiting the Sun-like star HD 119130
R. Luque, G. Nowak, E. Pallé +51
We present the discovery and characterization of a new transiting planet from Campaign 17 of the Kepler extended mission K2. HD 119130 b is a warm sub-Neptune on a 17-d orbit aroun…
Detection of He I Å absorption on HD 189733 b with CARMENES high-resolution transmission spectroscopy
M. Salz, S. Czesla, P. C. Schneider +35
We present three transit observations of HD 189733 b obtained with the high-resolution spectrograph CARMENES at Calar Alto. A strong absorption signal is detected in the near-infra…
Stellar activity analysis of Barnard's Star: Very slow rotation and evidence for long-term activity cycle
B. Toledo-Padrón, J. I. González Hernández, C. Rodríguez-López +58
The search for Earth-like planets around late-type stars using ultra-stable spectrographs requires a very precise characterization of the stellar activity and the magnetic cycle of…
Multiple water band detections in the CARMENES near-infrared transmission spectrum of HD 189733 b
F. J. Alonso-Floriano, A. Sánchez-López, I. A. G. Snellen +27
Aims: We explore the capabilities of CARMENES for characterizing hot-Jupiter atmospheres by targeting multiple water bands, in particular, those at 1.15 and 1.4 m. Hubble Space…
The CARMENES search for exoplanets around M dwarfs: Nine new double-line spectroscopic binary stars
D. Baroch, J. C. Morales, I. Ribas +27
Context. The CARMENES spectrograph is surveying ~300 M dwarf stars in search for exoplanets. Among the target stars, spectroscopic binary systems have been discovered, which can be…
The CARMENES search for exoplanets around M dwarfs. A Neptune-mass planet traversing the habitable zone around HD 180617
A. Kaminski, T. Trifonov, J. A. Caballero +37
Despite their activity, low-mass stars are of particular importance for the search of exoplanets by the means of Doppler spectroscopy, as planets with lower masses become detectabl…
Detection and Doppler monitoring of EPIC 246471491, a system of four transiting planets smaller than Neptune
E. Palle, G. Nowak, R. Luque +43
The Kepler extended mission, also known as K2, has provided the community with a wealth of planetary candidates that orbit stars typically much brighter than the targets of the ori…
The CARMENES search for exoplanets around M dwarfs: A low-mass planet in the temperate zone of the nearby K2-18
Paula Sarkis, Thomas Henning, Martin Kürster +22
K2-18 is a nearby M2.5 dwarf, located at 34 pc and hosting a transiting planet which was first discovered by the {\it K2} mission and later confirmed with {\it Spitzer Space Telesc…
The CARMENES search for exoplanets around M dwarfs: Radial-velocity variations of active stars in visual-channel spectra
L. Tal-Or, M. Zechmeister, A. Reiners +22
Previous simulations predicted the activity-induced radial-velocity (RV) variations of M dwarfs to range from cm/s to km/s, depending on various stellar and activit…
The CARMENES search for exoplanets around M dwarfs: Wing asymmetries of H, Na I D, and He I lines
B. Fuhrmeister, S. Czesla, J. H. M. M. Schmitt +13
Stellar activity is ubiquitously encountered in M dwarfs and often characterised by the H line. In the most active M dwarfs, H is found in emission, sometimes with a complex…