M. Perger
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View article: The CARMENES search for exoplanets around M dwarfs. Revisiting the GJ 317, GJ 463, and GJ 3512 systems and two newly discovered planets orbiting GJ 9773 and GJ 508.2
The CARMENES search for exoplanets around M dwarfs. Revisiting the GJ 317, GJ 463, and GJ 3512 systems and two newly discovered planets orbiting GJ 9773 and GJ 508.2 Open
Surveys for exoplanets indicate that the occurrence rate of gas giant planets orbiting late-type stars in orbits with periods shorter than 1000 days is lower than in the case of Sun-like stars. This is in agreement with planet formation mo…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context . Surveys for exoplanets indicate that the occurrence rate of gas giant planets orbiting late-type stars in orbits with periods shorter than 1000 days is lower than in the case of Sun-like stars. This is in agreement with planet fo…
View article: HADES RV Programme with HARPS-N at TNG
HADES RV Programme with HARPS-N at TNG Open
The low masses of M dwarfs create attractive opportunities for exoplanet radial-velocity (RV) detections. These stars, however, exhibit strong stellar activity that may attenuate or mimic planetary signals. We present a velocimetric analys…
View article: Identifying activity induced RV periodicities and correlations using Central Line Moments
Identifying activity induced RV periodicities and correlations using Central Line Moments Open
The radial velocity (RV) method of exoplanet detection requires mitigation of nuisance signals arising from stellar activity. Using analytic cool and facular spot models, we explore the use of central line moments (CLMs) for recovering and…
View article: Identifying activity induced RV periodicities and correlations using central line moments
Identifying activity induced RV periodicities and correlations using central line moments Open
The radial velocity (RV) method of exoplanet detection requires mitigation of nuisance signals arising from stellar activity. Using analytic cool and facular spot models, we explore the use of central line moments (CLMs) for recovering and…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
We report the discovery of HN Lib b, a sub-Neptunian mass planet orbiting the nearby ( d ≈ = 6.25 pc) M4.0 V star HN Lib detected by our CARMENES radial-velocity (RV) survey. We determined a planetary minimum mass of M b sin i = 5.46 ± 0.7…
View article: The CARMENES search for exoplanets around M dwarfs. A sub-Neptunian mass planet in the habitable zone of HN Lib
The CARMENES search for exoplanets around M dwarfs. A sub-Neptunian mass planet in the habitable zone of HN Lib Open
We report the discovery of HN Lib b, a sub-Neptunian mass planet orbiting the nearby ($d \approx$ = 6.25 pc) M4.0 V star HN Lib detected by our CARMENES radial-velocity (RV) survey. We determined a planetary minimum mass of $M_\text{b}\sin…
View article: The CARMENES search for exoplanets around M dwarfs. Guaranteed time observations Data Release 1 (2016-2020)
The CARMENES search for exoplanets around M dwarfs. Guaranteed time observations Data Release 1 (2016-2020) Open
The CARMENES instrument was conceived to deliver high-accuracy radial velocity (RV) measurements with long-term stability to search for temperate rocky planets around a sample of nearby cool stars. The broad wavelength coverage was designe…
View article: A machine learning approach for correcting radial velocities using physical observables
A machine learning approach for correcting radial velocities using physical observables Open
Context. Precision radial velocity (RV) measurements continue to be a key tool for detecting and characterising extrasolar planets. While instrumental precision keeps improving, stellar activity remains a barrier to obtaining reliable meas…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. Detecting a planetary companion in a short-period orbit through radio emission from the interaction with its host star is a new prospect in exoplanet science. Recently, a tantalising signal was found close to the low-mass stellar …
View article: The CARMENES search for exoplanets around M dwarfs. A long-period planet around GJ 1151 measured with CARMENES and HARPS-N data
The CARMENES search for exoplanets around M dwarfs. A long-period planet around GJ 1151 measured with CARMENES and HARPS-N data Open
Detecting a planetary companion in a short-period orbit through radio emission from the interaction with its host star is a new prospect in exoplanet science. Recently, a tantalising signal was found close to the low-mass stellar system GJ…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
We present the discovery of an Earth-mass planet ( M b sin i = 1.26 ± 0.21 M ⊕ ) on a 15.6 d orbit of a relatively nearby ( d ~ 9.6 pc) and low-mass (0.167 ± 0.011 M ⊙ ) M5.0 V star, Wolf 1069. Sitting at a separation of 0.0672 ± 0.0014 au…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. The CARMENES instrument, installed at the 3.5 m telescope of the Calar Alto Observatory in Almería, Spain, was conceived to deliver high-accuracy radial velocity (RV) measurements with long-term stability to search for temperate r…
View article: A quarter century of spectroscopic monitoring of the nearby M dwarf Gl 514
A quarter century of spectroscopic monitoring of the nearby M dwarf Gl 514 Open
Context. Statistical analyses based on Kepler data show that most of the early-type M dwarfs host multi-planet systems consisting of Earth- to sub-Neptune-sized planets with orbital periods of up to ~250 days, and that at least one such pl…
View article: HADES RV Programme with HARPS-N at TNG
HADES RV Programme with HARPS-N at TNG Open
Aims. We present the complete Bayesian statistical analysis of the HArps-n red Dwarf Exoplanet Survey (HADES), which monitored the radial velocities of a large sample of M dwarfs with HARPS-N at TNG over the last 6 yr. Methods. The targets…
View article: A quarter century of spectroscopic monitoring of the nearby M dwarf Gl 514. A super-Earth on an eccentric orbit moving in and out of the habitable zone
A quarter century of spectroscopic monitoring of the nearby M dwarf Gl 514. A super-Earth on an eccentric orbit moving in and out of the habitable zone Open
We investigated the presence of planetary companions around the nearby (7.6 pc) and bright ($V=9$ mag) early-type M dwarf Gl 514, analysing 540 radial velocities collected over nearly 25 years with the HIRES, HARPS, and CARMENES spectrogra…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
The CARMENES radial-velocity survey is currently searching for planets in a sample of 387 M dwarfs. Here we report on two Saturn-mass planets orbiting TYC 2187-512-1 ( M * = 0.50 M ⊙ ) and TZ Ari ( M * = 0.15 M ⊙ ), respectively. We obtain…
View article: TOI-1201 b: A mini-Neptune transiting a bright and moderately young M\n dwarf
TOI-1201 b: A mini-Neptune transiting a bright and moderately young M\n dwarf Open
We present the discovery of a transiting mini-Neptune around TOI-1201, a\nrelatively bright and moderately young early M dwarf ($J \\approx$ 9.5 mag,\n$\\sim$600-800 Myr) in an equal-mass $\\sim$8 arcsecond-wide binary system, using\ndata …
View article: TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf
TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf Open
We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf ( J ≈ 9.5 mag, ~600–800 Myr) in an equal-mass ~8 arcsecond-wide binary system, using data from the Transiting Exo…
View article: CARMENES detection of the Ca II infrared triplet and possible evidence of He I in the atmosphere of WASP-76b
CARMENES detection of the Ca II infrared triplet and possible evidence of He I in the atmosphere of WASP-76b Open
Ultra-hot Jupiters are highly irradiated gas giants with equilibrium temperatures typically higher than 2000 K. Atmospheric studies of these planets have shown that their transmission spectra are rich in metal lines, with some of these met…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. The CARMENES exoplanet survey of M dwarfs has obtained more than 18 000 spectra of 329 nearby M dwarfs over the past five years as part of its guaranteed time observations (GTO) program. Aims. We determine planet occurrence rates …
View article: The CARMENES search for exoplanets around M dwarfs -- Planet occurrence rates from a subsample of 71 stars
The CARMENES search for exoplanets around M dwarfs -- Planet occurrence rates from a subsample of 71 stars Open
The CARMENES exoplanet survey of M dwarfs has obtained more than 18 000 spectra of 329 nearby M dwarfs over the past five years as part of its guaranteed time observations (GTO) program. We determine planet occurrence rates with the 71 sta…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. M dwarfs are ideal targets for the search of Earth-size planets in the habitable zone using the radial velocity method, and are attracting the attention of many ongoing surveys. One of the expected results of these surveys is that…
View article: The CARMENES search for exoplanets around M dwarfs: Spectroscopic orbits of nine M-dwarf multiple systems, including two triples, two brown dwarf candidates, and one close M-dwarf-white dwarf binary
The CARMENES search for exoplanets around M dwarfs: Spectroscopic orbits of nine M-dwarf multiple systems, including two triples, two brown dwarf candidates, and one close M-dwarf-white dwarf binary Open
M dwarfs are ideal targets for the search of Earth-size planets in the habitable zone using the radial velocity method, attracting the attention of many ongoing surveys. As a by-product of these surveys, new multiple stellar systems are al…
View article: HADES RV programme with HARPS-N at TNG
HADES RV programme with HARPS-N at TNG Open
Context. It is now well-established that small, rocky planets are common around low-mass stars. However, the detection of such planets is challenged by the short-term activity of host stars. Aims. The HARPS-N red Dwarf Exoplanet Survey pro…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. The interaction between Earth-like exoplanets and the magnetic field of low-mass host stars are considered to produce weak emission signals at radio frequencies. A study using LOFAR data announced the detection of radio emission f…
View article: HADES RV Programme with HARPS-N at TNG
HADES RV Programme with HARPS-N at TNG Open
Context. The high number of super-Earth and Earth-like planets in the habitable zone detected around M-dwarf stars in recent years has revealed these stellar objects to be the key to planetary radial velocity (RV) searches. Aims. Using the…
View article: The CARMENES search for exoplanets around M dwarfs, No evidence for a\n super-Earth in a 2-day orbit around GJ 1151
The CARMENES search for exoplanets around M dwarfs, No evidence for a\n super-Earth in a 2-day orbit around GJ 1151 Open
The interaction between Earth-like exoplanets and the magnetic field of\nlow-mass host stars are considered to produce weak emission signals at radio\nfrequencies. A study using LOFAR data announced the detection of radio emission\nfrom th…
View article: The CARMENES search for exoplanets around M dwarfs, No evidence for a super-Earth in a 2-day orbit around GJ 1151
The CARMENES search for exoplanets around M dwarfs, No evidence for a super-Earth in a 2-day orbit around GJ 1151 Open
The interaction between Earth-like exoplanets and the magnetic field of low-mass host stars are considered to produce weak emission signals at radio frequencies. A study using LOFAR data announced the detection of radio emission from the m…
View article: A super-Earth on a close-in orbit around the M1V star GJ 740
A super-Earth on a close-in orbit around the M1V star GJ 740 Open
Context. M-dwarfs have proven to be ideal targets for planetary radial velocity (RV) searches due to their higher planet-star mass contrast, which favors the detection of low-mass planets. The abundance of super-Earth and Earth-like planet…