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A terrestrial planet candidate in a temperate orbit around Proxima Centauri
TLDR
Observations reveal the presence of a small planet with a minimum mass of about 1.3 Earth masses orbiting Proxima with a period of approximately 11.2 days at a semi-major-axis distance of around 0.05 astronomical units.
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The double-mode nature of the HADS star GSC 00144-03031 and the Petersen diagram of the class
The double-mode pulsation of GSC 00144-03031 has been detected when searching for COROT targets. A very large dataset composed of 4722 photometric measurements was collected at six observatories in…
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CARMENES instrument overview
This paper gives an overview of the CARMENES instrument and of the survey that will be carried out with it during the first years of operation. CARMENES (Calar Alto high-Resolution search for M…
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The CARMENES search for exoplanets around M dwarfs. Stellar atmospheric parameters of target stars with SteParSyn
Context. The new CARMENES instrument comprises two high-resolution and high-stability spectrographs that are used to search for habitable planets around M dwarfs in the visible and near-infrared…
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Two planets around Kapteyn's star: a cold and a temperate super-Earth orbiting the nearest halo red dwarf
Exoplanets of a few Earth masses can be now detected around nearby low-mass stars using Doppler spectroscopy. In this paper, we investigate the radial velocity variations of Kapteyn's star, which is…
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Asteroseismic analysis of the CoRoT \delta-Scuti star HD174936
We present an analysis of the \delta-Scuti star object HD 174936 (ID 7613) observed by CoRoT during the first short run SRc01 (27 days). A total number of 422 frequencies we are extracted from the…
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Ground-based detection of an extended helium atmosphere in the Saturn-mass exoplanet WASP-69b
TLDR
Ground-based high-resolution spectroscopy detected excess absorption in the helium triplet during the transit of the Saturn-mass exoplanet WASP-69b, which is interpreted as the escape of part of the atmosphere trailing behind the planet in comet-like form.
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A low-mass planet candidate orbiting Proxima Centauri at a distance of 1.5 AU
TLDR
It is shown that the existence of the planet can be ascertained, and its true mass can be determined with high accuracy, by combining Gaia astrometry and radial velocities, and the candidate planet represents a challenge for the models of super-Earth formation and evolution.
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CARMENES. I: instrument and survey overview
CARMENES (Calar Alto high-Resolution search for M dwarfs with Exo-earths with Near-infrared and optical Echelle Spectrographs) is a next-generation instrument for the 3.5m telescope at the Calar Alto…
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Spectrum radial velocity analyser (SERVAL). High-precision radial velocities and two alternative spectral indicators
Context: The CARMENES survey is a high-precision radial velocity (RV) programme that aims to detect Earth-like planets orbiting low-mass stars. Aims: We develop least-squares fitting algorithms to…
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