171 citations · 562 across the 25 of their papers we have counts for
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Benchmark brown dwarfs -- I. A blue M2 + T5 wide binary and a probable young [M4 + M4] + [T7 + T8] hierarchical quadruple
Z. H. Zhang, F. Navarete, M. C. Galvez-Ortiz +13
Benchmark brown dwarfs in wide binary systems are crucial for characterizing substellar objects and calibrating atmospheric and evolutionary models. However, brown dwarf benchmarks…
Detection of Methane in the Closest Extreme Metal-poor T Dwarf WISEA J181006.18-101000.5
Jerry Jun-Yan Zhang, Nicolas Lodieu, Eduardo L. Martín +7
WISEA J181006.18-101000.5 (WISE1810) is the nearest metal-poor ultracool dwarf to the Sun. It has a low effective temperature and has been classified as extreme early-T subdwarf. H…
Optical constraints on the coldest metal-poor population
Jerry Jun-Yan Zhang, Nicolas Lodieu, Eduardo L. Martín +10
The coldest metal-poor population made of T and Y dwarfs are archaeological tracers of our Galaxy because they are very old and have kept the pristine material. The optical propert…
Primeval very low-mass stars and brown dwarfs -- VIII. The first age benchmark L subdwarf, a wide companion to a halo white dwarf
Z. H. Zhang, R. Raddi, A. J. Burgasser +12
We report the discovery of five white dwarf + ultracool dwarf systems identified as common proper motion wide binaries in the Gaia Catalogue of Nearby Stars. The discoveries includ…
Physical properties and trigonometric distance of the peculiar dwarf WISE J181005.5101002.3
N. Lodieu, M. R. Zapatero Osorio, E. L. Martin +2
Our goal is to characterise the physical properties of the metal-poor brown dwarf population. In particular, we focus on the recently discovered peculiar dwarf WISE J18100551010…
Radio emission in a nearby ultracool dwarf binary: a multi-frequency study
Juan B. Climent, J. C. Guirado, M. R. Zapatero-Osorio +8
The substellar triple system VHS J125601.92125723.9 is composed by an equal-mass M7.5 brown dwarf binary and a L7 low-mass substellar object. In this work, we aim to identify th…
GTC/CanariCam deep mid-infrared imaging survey of northern stars within 5 pc
Bartosz Gauza, Víctor J. S. Béjar, Rafael Rebolo +7
In this work we present the results of a direct imaging survey for brown dwarf companions around the nearest stars at the mid-infrared 10 micron range (=8.7m, =1.1…
An extensive spectroscopic time series of three Wolf-Rayet stars -- II. A search for wind asymmetries in the dust-forming WC7 binary WR137
N. St-Louis, C. Piaulet, N. D. Richardson +39
We present the results of a four-month, spectroscopic campaign of the Wolf-Rayet dust-making binary, WR137. We detect only small-amplitude, random variability in the CIII5696 emiss…
A low-mass triple system with a wide L/T transition brown dwarf component: NLTT 51469AB/SDSS 2131-0119
B. Gauza, V. J. S. Béjar, A. Pérez-Garrido +6
We demonstrate that the previously identified L/T transition brown dwarf SDSS J213154.43-011939.3 (SDSS 2131-0119) is a widely separated (82.3'', 3830 au) common proper motio…
Radio emission in ultracool dwarfs: the nearby substellar triple system VHS 12561257
J. C. Guirado, R. Azulay, B. Gauza +4
With the purpose to investigate the radio emission of new ultracool objects, we carried out a targeted search in the recently discovered system VHS J125601.92125723.9 (hereafter…
CARMENES input catalogue of M dwarfs II. High-resolution imaging with FastCam
M. Cortes-Contreras, V. J. S. Bejar, J. A. Caballero +12
Aims: 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 th…
An extensive spectroscopic time-series of three Wolf-Rayet stars. I. The lifetime of large-scale structures in the wind of WR 134
E. J. Aldoretta, N. St-Louis, N. D. Richardson +46
During the summer of 2013, a 4-month spectroscopic campaign took place to observe the variabilities in three Wolf-Rayet stars. The spectroscopic data have been analyzed for WR 134…
Constraints on the substellar companions in wide orbits around the Barnard's Star from CanariCam mid-infrared imaging
B. Gauza, V. J. S. Béjar, R. Rebolo +6
We have performed mid-infrared imaging of Barnard's Star, one of the nearest stars to the Sun, using CanariCam on the 10.4 m Gran Telescopio Canarias. We aim to investigate an area…
2MASS J154043.42-510135.7: a new addition to the 5 pc population
A. Perez-Garrido, N. Lodieu, V. J. S. Bejar +4
The aim of the project is to find the stars nearest to the Sun and to contribute to the completion of the stellar and substellar census of the solar neighbourhood. We identified a…