Toward a comprehensive characterization of L subdwarfs

Subsolar metallicity L subdwarfs was discovered over a decade ago, but remain poor understood due to lack of known objects. We started to search for L subdwarfs since a few years ago and have increased the number of known L subdwarfs from 23 to 57. We are following up 33 L subdwarfs with X-shooter on the Very Large Telescope. We are also measuring parallaxes of 20 L subdwarfs with the OSIRIS on the Gran Telescopio Canarias.