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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 generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
The Lomb-Scargle periodogram is a common tool in the frequency analysis of unequally spaced data equivalent to least-squares fitting of sine waves. We give an analytic solution for the generalisation…
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PyA: Python astronomy-related packages
The M dwarf planet search programme at the ESO VLT + UVES. A search for terrestrial planets in the h
We present radial velocity (RV) measurements of our sample of 40 M dwarfs from our planet search programme with VLT+UVES begun in 2000. Although with our RV precision down to 2–2.5 m/s and timebase…
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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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The planet search programme at the ESO CES and HARPS - IV. The search for Jupiter analogues around solar-like stars
Context. In 1992 we began a precision radial velocity survey for planets around solar-like stars with the Coude Echelle Spectrograph and the Long Camera (CES LC) at the 1.4m telescope in La Silla…
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An independent planet search in the Kepler dataset - II. An extremely low-density super-Earth mass planet around Kepler-87
Context. The primary goal of the Kepler mission is the measurement of the frequency of Earth-like planets around Sun-like stars. However, the confirmation of the smallest of Kepler’s candidates in…
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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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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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