H. L. Ruh
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View article: Improving radial velocity precision with CARMENES-PLUS:An upgrade of the near-infrared spectrograph cooling system
Improving radial velocity precision with CARMENES-PLUS:An upgrade of the near-infrared spectrograph cooling system Open
CARMENES is a dual-channel high-resolution spectrograph at the 3.5 m Calar Alto telescope designed to detect low-mass planets around late-type dwarfs by measuring their radial velocities (RVs). High thermal stability in both the visible (V…
View article: Improving radial velocity precision with CARMENES-PLUS
Improving radial velocity precision with CARMENES-PLUS Open
Context: CARMENES is a dual-channel high-resolution spectrograph at the 3.5 m Calar Alto telescope designed to detect low-mass planets around late-type dwarfs by measuring their radial velocities (RVs). High thermal stability in both the v…
View article: Radial velocity search for extrasolar planets around late M dwarfs
Radial velocity search for extrasolar planets around late M dwarfs Open
The radial velocity (RV) method has revealed the presence of rocky exoplanets in the habitable zones of M dwarf stars in the Solar neighborhood. Some of the potentially most Earth-like exoplanets have been found orbiting late-type M dwarfs…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. Radial velocity (RV) jitter represents an intrinsic limitation on the precision of Doppler searches for exoplanets that can originate from both instrumental and astrophysical sources. Aims. We aim to determine the RV jitter floor …
View article: A conclusive non-detection of magnetic field in the Am star <i>o</i> Peg with high-precision near-infrared spectroscopy
A conclusive non-detection of magnetic field in the Am star <i>o</i> Peg with high-precision near-infrared spectroscopy Open
Context. The A-type metallic-line (Am) stars are typically considered to be non-magnetic or to possess very weak sub- G magnetic fields. This view has been repeatedly challenged in the literature; most commonly for the bright hot Am star o…
View article: A conclusive non-detection of magnetic field in the Am star o Peg with high-precision near-infrared spectroscopy
A conclusive non-detection of magnetic field in the Am star o Peg with high-precision near-infrared spectroscopy Open
The A-type metallic-line (Am) stars are typically considered to be non-magnetic or possessing very weak sub-G magnetic fields. This view has been repeatedly challenged in the literature, most commonly for the bright hot Am star o Peg. Seve…
View article: Search for giant planets in M 67 V: A warm Jupiter orbiting the turn-off star S1429
Search for giant planets in M 67 V: A warm Jupiter orbiting the turn-off star S1429 Open
Context. Planets orbiting members of open or globular clusters offer a great opportunity to study exoplanet populations systematically, as stars within clusters provide a mostly homogeneous sample, at least in chemical composition and stel…
View article: Teegarden’s Star revisited
Teegarden’s Star revisited Open
The two known planets in the planetary system of Teegarden’s Star are among the most Earth-like exoplanets currently known. Revisiting this nearby planetary system with two planets in the habitable zone aims at a more complete census of pl…
View article: Teegarden's Star revisited: A nearby planetary system with at least three planets
Teegarden's Star revisited: A nearby planetary system with at least three planets Open
The two known planets in the planetary system of Teegarden's Star are among the most Earth-like exoplanets currently known. Revisiting this nearby planetary system with two planets in the habitable zone aims at a more complete census of pl…
View article: Planet populations inferred from debris discs
Planet populations inferred from debris discs Open
We know little about the outermost exoplanets in planetary systems because our detection methods are insensitive to moderate-mass planets on wide orbits. However, debris discs can probe the outer-planet population because dynamical modelli…
View article: LIStEN: <i>L</i>′ band Imaging Survey for Exoplanets in the North
LIStEN: <i>L</i>′ band Imaging Survey for Exoplanets in the North Open
Context. Planetary systems and debris discs are natural by-products of the star formation process, and they affect each other. The direct imaging technique allows simultaneous imaging of both a companion and the circumstellar disc it resid…
View article: ISPY-NACO Imaging Survey for Planets around Young stars
ISPY-NACO Imaging Survey for Planets around Young stars Open
Context. The occurrence rate of long-period ( a ≳ 50 au) giant planets around young stars is highly uncertain since it is not only governed by the protoplanetary disc structure and planet formation process, but also reflects both dynamical…
View article: ISPY -- NACO Imaging Survey for Planets around Young stars: Survey description and results from the first 2.5 years of observations
ISPY -- NACO Imaging Survey for Planets around Young stars: Survey description and results from the first 2.5 years of observations Open
The occurrence rate of long-period giant planets around young stars is highly uncertain since it is not only governed by the protoplanetary disc structure and planet formation process, but also reflects dynamical re-structuring processes a…