Primeval very low-mass stars and brown dwarfs โ III. The halo transitional brown dwarfs
Primeval very low-mass stars and brown dwarfs โ III. The halo transitional brown dwarfs
We report the discovery of an esdL3 subdwarf, ULAS J020858.62+020657.0, and a usdL4.5 subdwarf, ULAS J230711.01+014447.1. They were identified as L subdwarfs by optical spectra obtained with the Gran Telescopio Canarias, and followed up by optical-to-near-infrared spectroscopy with the Very Large Telescope. We also obtained an optical-to-near-infrared spectrum of a โฆ