137 citations · 861 across the 27 of their papers we have counts for
14 papers · 1 filter
Ammonia-methane ratios from H-band near-infrared spectra of late-T and Y dwarfs
Eduardo L. Martín, Jun-Yan Zhang, Pedro Esparza +4
Gas cells containing ammonia and methane at atmospheric pressure were custom-made in our chemical laboratory. Low-resolution near-infrared spectroscopy of these gas cells were coll…
New constraints on the minimum mass for thermonuclear lithium burning in brown dwarfs
Eduardo L. Martín, Nicolas Lodieu, Carlos del Burgo
The theory of substellar evolution predicts that there is a sharp mass boundary between lithium and non-lithium brown dwarfs, not far below the substellar-mass limit. The imprint o…
Search for the sub-stellar lithium depletion boundary in the open star cluster Coma Berenices
Eduardo L. Martín, Nicolas Lodieu, Víctor Sánchez Béjar
We mainly aim to search for the lithium depletion boundary (LDB) among the sub-stellar population of the open star cluster Coma Berenices. We carried out a search for brown dwarf (…
J-PLUS: Discovery and characterisation of ultracool dwarfs using Virtual Observatory tools
E. Solano, E. L. Martín, J. A. Caballero +20
Ultracool dwarfs (UCDs) are objects with spectral types equal or later than M7. Most of them have been discovered using wide-field imaging surveys. The Virtual Observatory (VO) has…
The lithium depletion boundary and the age of the Hyades cluster
Eduardo L. Martín, Nicolas Lodieu, Yakiv Pavlenko +1
Determination of the lithium depletion boundary (LDB), i.e., the observational limit below which the cores of very low-mass objects do not reach high enough temperature for Li dest…
Parallax of the L4.5 dwarf 2M182114 from high-precision astrometry with OSIRIS at GTC
J. Sahlmann, P. F. Lazorenko, H. Bouy +4
We used the OSIRIS camera at the 10.4 m Gran Telescopio Canarias (GTC) to monitor the astrometric motion of the L4.5 dwarf 2M182114 over 17 months. The astrometric residuals of…