156 citations · 953 across the 23 of their papers we have counts for
23 papers
Planetary companions orbiting the M dwarfs GJ 724 and GJ 3988. A CARMENES and IRD collaboration
P. Gorrini, J. Kemmer, S. Dreizler +36
We report the discovery of two exoplanets around the M dwarfs GJ 724 and GJ 3988 using the radial velocity (RV) method. We obtained a total of 153 3.5 m Calar Alto/CARMENES spectra…
The CARMENES search for exoplanets around M dwarfs. Stellar atmospheric parameters of target stars with SteParSyn
Emilio Marfil, Hugo M. Tabernero, David Montes +24
We determined effective temperatures, surface gravities, and metallicities for a sample of 343 M dwarfs observed with CARMENES, the double-channel, high-resolution spectrograph ins…
TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf
D. Kossakowski, J. Kemmer, P. Bluhm +62
We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf ( 9.5 mag, 600-800 Myr) in an equal-m…
Analytical simulations of the effect of satellite constellations on optical and near-infrared observations
C. G. Bassa, O. R. Hainaut, D. Galadi-Enriquez
The number of satellites in low-Earth orbit is increasing rapidly, and many tens of thousands of them are expected to be launched in the coming years. There is a strong concern amo…
The CARMENES search for exoplanets around M dwarfs, No evidence for a super-Earth in a 2-day orbit around GJ 1151
M. Perger, I. Ribas, G. Anglada-Escudé +20
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 LOFA…
Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)
J. Kemmer, S. Stock, D. Kossakowski +93
We present the confirmation and characterisation of GJ 3473 b (G 50--16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal ($P=1.1980035\pm0.…
The CARMENES search for exoplanets around M dwarfs: Convective shift and starspot constraints from chromatic radial velocities
D. Baroch, J. C. Morales, I. Ribas +26
Context. Variability caused by stellar activity represents a challenge to the discovery and characterization of terrestrial exoplanets and complicates the interpretation of atmosph…
The CARMENES search for exoplanets around M dwarfs. Variability of the He I line at 10830 Å
B. Fuhrmeister, S. Czesla, L. Hildebrandt +23
The He I infrared (IR) triplet at 10830 Åis known as an activity indicator in solar-type stars and has become a primary diagnostic in exoplanetary transmission spectroscopy. He I l…
The CARMENES search for exoplanets around M dwarfs. The He I infrared triplet lines in PHOENIX models of M2-3 V stars
D. Hintz, B. Fuhrmeister, S. Czesla +25
The He I infrared (IR) line at a vacuum wavelength of 10833 A is a diagnostic for the investigation of atmospheres of stars and planets orbiting them. For the first time, we study…
The CARMENES search for exoplanets around M dwarfs. The He I triplet at 10830 across the M dwarf sequence
B. Fuhrmeister, S. Czesla, L. Hildebrandt +24
The He I infrared (IR) triplet at 10830 AA is an important activity indicator for the Sun and in solar-type stars, however, it has rarely been studied in relation to M dwarfs to da…
A giant exoplanet orbiting a very low-mass star challenges planet formation models
J. C. Morales, A. J. Mustill, I. Ribas +179
Statistical analyses from exoplanet surveys around low-mass stars indicate that super-Earth and Neptune-mass planets are more frequent than gas giants around such stars, in agreeme…
The CARMENES search for exoplanets around M dwarfs. Two temperate Earth-mass planet candidates around Teegarden's Star
M. Zechmeister, S. Dreizler, I. Ribas +182
Context. Teegarden's Star is the brightest and one of the nearest ultra-cool dwarfs in the solar neighbourhood. For its late spectral type (M7.0V), the star shows relatively little…
The CARMENES search for exoplanets around M dwarfs Detection of a mini-Neptune around LSPM J2116+0234 and refinement of orbital parameters of a super-Earth around GJ 686 (BD+18 3421)
S. Lalitha, D. Baroch, J. C. Morales +34
Although M dwarfs are known for high levels of stellar activity, they are ideal targets for the search of low-mass exoplanets with the radial velocity (RV) method. We report the di…
The CARMENES search for exoplanets around M dwarfs. Chromospheric modeling of M2-3 V stars with PHOENIX
D. Hintz, B. Fuhrmeister, S. Czesla +26
Chromospheric modeling of observed differences in stellar activity lines is imperative to fully understand the upper atmospheres of late-type stars. We present one-dimensional para…
The CARMENES search for exoplanets around M dwarfs. Period search in H, Na I D, and Ca II IRT lines
B. Fuhrmeister, S. Czesla, J. H. M. M. Schmitt +20
We use spectra from CARMENES, the Calar Alto high-Resolution search for M dwarfs with Exo-earths with Near-infrared and optical Echelle Spectrographs, to search for periods in chro…
The CARMENES search for exoplanets around M dwarfs: Nine new double-line spectroscopic binary stars
D. Baroch, J. C. Morales, I. Ribas +27
Context. The CARMENES spectrograph is surveying ~300 M dwarf stars in search for exoplanets. Among the target stars, spectroscopic binary systems have been discovered, which can be…
The CARMENES search for exoplanets around M dwarfs: Wing asymmetries of H, Na I D, and He I lines
B. Fuhrmeister, S. Czesla, J. H. M. M. Schmitt +13
Stellar activity is ubiquitously encountered in M dwarfs and often characterised by the H line. In the most active M dwarfs, H is found in emission, sometimes with a complex…
The CARMENES search for exoplanets around M dwarfs. First visual-channel radial-velocity measurements and orbital parameter updates of seven M-dwarf planetary systems
T. Trifonov, M. Kürster, M. Zechmeister +166
Context: The main goal of the CARMENES survey is to find Earth-mass planets around nearby M-dwarf stars. Seven M-dwarfs included in the CARMENES sample had been observed before wit…
An All Sky Transmission Monitor: ASTMON
J. Aceituno, S. F Sanchez, F. J. Aceituno +4
We present here the All Sky Transmission MONitor (ASTMON), designed to perform a continuous monitoring of the surface brightness of the complete night-sky in several bands. The dat…
uvby-Hbeta CCD photometry and membership segregation of the open cluster NGC 2548; Gaps in the Main Sequence of open clusters
L. Balaguer-Nunez, C. Jordi, D. Galadi-Enriquez
Deep CCD photometry in the uvby-Hbeta intermediate-band system is presented for the cluster NGC 2548 (M 48). A complete membership analysis based on astrometric and photometric cri…
uvby-Hbeta CCD Photometry of NGC 1817 and NGC 1807
L. Balaguer-Nunez, C. Jordi, D. Galadi-Enriquez +1
We have investigated the area of two NGC entries, NGC 1817 and NGC 1807, with deep CCD photometry in the uvby-Hbeta intermediate-band system. The photometric analysis of a selected…
New membership determination and proper motions of NGC 1817. Parametric and non-parametric approach
L. Balaguer-Nunez, C. Jordi, D. Galadi-Enriquez +1
We have calculated proper motions and re-evaluated the membership probabilities of 810 stars in the area of two NGC objects, NGC 1817 and NGC 1807. We have obtained absolute proper…
Photographic photometries and astrophysical parameters of the open clusters NGC1750 and NGC1758
K. P. Tian, C. G. Shu, J. L. Zhao +3
Photographic photometries of 789 stars in the region of the open clusters NGC1750 and NGC1758 are derived from a set of 8 photometric plates. According to the astronomical data inc…