A. Reiners

Publications384
h-index51
Citations9,318
Highly Influential Citations980
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A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
Aims. We present a new library of high-resolution synthetic spectra based on the stellar atmosphere code PHOENIX that can be used for a wide range of applications of spectral analysis and stellar… Expand
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. Expand
Rotation and differential rotation of active Kepler stars
We present rotation periods for thousands of active stars in the Kepler field derived from Q3 data. In most cases a second period close to the rotation period was detected, which we interpreted as… Expand
CHROMOSPHERIC ACTIVITY, ROTATION, AND ROTATIONAL BRAKING IN M AND L DWARFS
We present results from a high-resolution spectroscopic survey of 45 L dwarfs, which includes both very low mass stars and brown dwarfs. Our spectra allow us to derive a significant number of new… Expand
Energy flux determines magnetic field strength of planets and stars
TLDR
This work reports an extension of a scaling law derived from geodynamo models to rapidly rotating stars that have strong density stratification, and predicts that the field strengths of rapidly rotating brown dwarfs and massive extrasolar planets are high enough to make them observable. Expand
A VOLUME-LIMITED SAMPLE OF 63 M7-M9.5 DWARFS. II. ACTIVITY, MAGNETISM, AND THE FADE OF THE ROTATION-DOMINATED DYNAMO
In a volume-limited sample of 63 ultracool dwarfs of spectral type M7-M9.5, we have obtained high-resolution spectroscopy with UVES at the Very Large Telescope and HIRES at Keck Observatory. In this… Expand
EVIDENCE FOR MAGNETIC FLUX SATURATION IN RAPIDLY ROTATING M STARS
We present magnetic flux measurements in seven rapidly rotating M dwarfs. Our sample stars have X-ray and Hα emission indicative of saturated emission, i.e., emission at a high level, independent of… Expand
The First Direct Measurements of Surface Magnetic Fields on Very Low Mass Stars
We present the first direct magnetic field measurements on M dwarfs cooler than spectral class M4.5. Utilizing a new method based on the FeH band near 1 μm, we categorize the integrated surface… Expand
A CATALOG OF ROTATION AND ACTIVITY IN EARLY-M STARS
We present a catalog of rotation and chromospheric activity in a sample of 334 M dwarfs of spectral types M0-M4.5 populating the parameter space around the boundary to full convection. We obtain… Expand
The Radio Activity-Rotation Relation of Ultracool Dwarfs
We present a new radio survey of about 100 late-M and L dwarfs undertaken with the Very Large Array. The sample was chosen to explore the role of rotation in the radio activity of ultracool dwarfs.… Expand
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