activity
20122025
most citedSpectrum radial velocity analyser (SERVAL). High-precision radial velocities and two alternative spectral indicators

469 citations · 4.8k across the 86 of their papers we have counts for

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27 papers · 1 filter

astro-ph.SR2025

The CARMENES search for exoplanets around M dwarfs. Cluster analysis of signals from spectral activity indicators to search for shared periods

J. Kemmer, M. Lafarga, B. Fuhrmeister +17

A multitude of spectral activity indicators are routinely computed nowadays from the spectra generated as part of planet-hunting radial velocity surveys. Searching for shared perio…

astro-ph.SR2024★ 5 cited

Non-radial oscillations mimicking a brown dwarf orbiting the cluster giant NGC 4349 No. 127

Dane Spaeth, Sabine Reffert, Emily L. Hunt +2

Several evolved stars have been found to exhibit long-period radial velocity variations that cannot be explained by planetary or brown dwarf companions. Non-radial oscillations cau…

astro-ph.SR2023★ 23 cited

The CARMENES search for exoplanets around M dwarfs. Telluric absorption corrected high S/N optical and near-infrared template spectra of 382 M dwarf stars

E. Nagel, S. Czesla, A. Kaminski +22

Light from celestial objects interacts with the molecules of the Earth's atmosphere, resulting in the production of telluric absorption lines in ground-based spectral data. Correct…

astro-ph.SR2023★ 9 cited

The CARMENES search for exoplanets around M dwarfs -- A deep transfer learning method to determine Teff and [M/H] of target stars

A. Bello-García, V. M. Passegger, J. Ordieres-Meré +17

The large amounts of astrophysical data being provided by existing and future instrumentation require efficient and fast analysis tools. Transfer learning is a new technique promis…

astro-ph.SR2023★ 10 cited

The CARMENES search for exoplanets around M dwarfs. Line-by-line sensitivity to activity in M dwarfs

M. Lafarga, I. Ribas, M. Zechmeister +17

Radial velocities (RVs) measured from high-resolution stellar spectra are routinely used to detect and characterise orbiting exoplanet companions. The different lines present in st…

astro-ph.SR2022★ 19 cited

The CARMENES search for exoplanets around M dwarfs. Variability on long timescales as seen in chromospheric indicators

B. Fuhrmeister, S. Czesla, V. Perdelwitz +19

It is clearly established that the Sun has an 11-year cycle that is caused by its internal magnetic field. This cycle is also observed in a sample of M dwarfs. In the framework of…