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HST binary very low mass stars and brown dwarfs
We present analysis of Hubble Space Telescope (HST) images of 82 nearby field late M and L dwarfs. We resolve 13 of these systems into double M/L dwarf systems and identify an... -
Reference A0V stars
Hipparcos data for 71 nearby dwarf A0 stars were combined with other data, in particular with high resolution spectra to establish the HR diagram in this temperature range.... -
Main-sequence and subgiants ROSAT data
We present X-ray data for all main-sequence and subgiant stars of spectral types A, F, G, and K and luminosity classes IV and V listed in the Bright Star Catalogue (Cat. ) that... -
M dwarfs model photospheres. II.
We present a table of new "classical" model photospheres for M dwarfs computed with an extensive set of atomic and molecular opacities treated with the accurate and realistic... -
Dwarfs and subdwarfs IR photometry
The results of a long term programme of broad band JHK photometry, for a sample of 360 late type stars, made at the Observatorio del Teide (Tenerife, Spain) are presented. -
MeerLICHT phot. of hot sub-luminous stars
Colour-magnitude diagrams reveal a population of blue (hot) subluminous objects with respect to the main sequence. These hot subluminous stars are the result of evolutionary... -
Gaia DR3 data of 15062 gravity-mode pulsators
Gravito-inertial asteroseismology saw its birth thanks to high-precision CoRoT and Kepler space photometric light curves. So far, it gave rise to the internal rotation frequency... -
Period-spacing patterns in TESS southern CVZ
The theory of stellar evolution presents shortcomings when confronted with asteroseismic probes of interior physical properties. The differences between observations and theory... -
Dwarf stars limb-darkening coefficients
Stellar models applied to large stellar surveys of the Milky Way need to be properly tested against a sample of stars with highly reliable fundamental stellar parameters. We... -
Flares in 5 open clusters
Magnetic fields are a key component in the main sequence evolution of low mass stars. Flares, energetic eruptions on the surfaces of stars, are an unmistakable manifestation of... -
Dwarfs & giants surface brightness-colour relations
Surface brightness-colour relations (SBCRs) are used to derive the stellar angular diameters from photometric observations. They have various astrophysical applications, such as... -
Young companion candidate embedded in R CrA cloud
Within the NaCo-ISPY exoplanet imaging program, we aim at detecting and characterizing the population of low-mass companions at wide separations (>~10AU). We observed R CrA... -
CARMENES input catalogue of M dwarfs. IV.
The main goal of this work is to measure rotation periods of the M-type dwarf stars being observed by the CARMENES exoplanet survey to help distinguish radial-velocity signals... -
Ultra-cool dwarfs candidates in Gaia DR2
The second Gaia data release (Gaia DR2) contains high-precision positions, parallaxes, and proper motions for 1.3 billion sources. The resulting Hertzsprung-Russel diagram... -
VLTS. Properties of O dwarf in 30 Dor
The VLT-FLAMES Tarantula Survey has observed hundreds of O-type stars in the 30 Doradus region of the Large Magellanic Cloud (LMC). We study the properties of 105 apparently... -
Kepler solar-type stars modeling
The Kepler space telescope yielded unprecedented data for the study of solar-like oscillations in other stars. The large samples of multi-year observations posed an enormous... -
CARMENES input catalogue of M dwarfs II
We search for low-mass companions of M dwarfs and characterize their multiplicity fraction with the purpose of helping in the selection of the most appropriate targets for the... -
Photometric brown-dwarf classification
We present a homogeneous sample of 1361 L and T dwarfs brighter than J=17.5 (of which 998 are new), from an effective area of 3070deg^2^, classified by the photo-type method to... -
Brown dwarf atmosphere monitoring (BAM)
Using the SofI instrument on the 3.5m New Technology Telescope, we have conducted an extensive near-infrared monitoring survey of an unbiased sample of 69 brown dwarfs spanning... -
FGK dwarf stars limb darkening coefficients
Limb darkening is a fundamental ingredient for interpreting observations of planetary transits, eclipsing binaries, optical/infrared interferometry and microlensing events....