Nicolas Lodieu

TL;DR: In this paper, the authors present near-infrared (1.15-2.50 µm) medium-resolution (R = 1700) spectroscopy of a sample of 23 brown dwarf candidates in the young Upper Sco association.

TL;DR: In this paper, the authors derived luminosities of log L/L_sun = -4.699+/-0.017 and -5.232+/- 0.020 for epsilon Indi Ba, Bb, respectively, and using the dynamical system mass and COND03 evolutionary models predict a system age of 3.7--4.3 Gyr, in excess of previous estimates and recent predictions.

TL;DR: In this paper, a multi-fibre intermediate-resolution optical spectroscopy of 94 photometric and proper motion selected low-mass star and brown dwarf candidates in Upper Sco with AAT/AAOmega was obtained.

TL;DR: In this paper, the authors show that the LDB method can be extended to significant older ages than previously thought, by using intermediate resolution optical spectra of six L-type candidate members in the Hyades cluster obtained using Optical System for Imaging and Low Resolution Integrated Spectroscopy at the 10.4 m Gran Telescopio Canarias.

TL;DR: In this article, the shape of the mass function in the low-mass and substellar regimes in the σ Orionis cluster (∼3 Myr, ∼352 pc, solar metallicity) as accurately as possible and compare it with the results in other clusters.