Purple dwarfs: New L subdwarfs from UKIDSS and SDSS
1 Centre for Astrophysics Research, University of Hertfordshire, Hatfield AL10 9AB, UK
2 Department of Astronomy, Universidad de Chile, Casilla postal 36D, Santiago, Chile
3 Centro de Astrobiologia - INTA-CSIC
a e-mail: firstname.lastname@example.org
The first L subdwarf was a discovered only ten years ago. Less than ten L subdwarfs been published in the literature to date. Metal-poor ultracool atmospheres has not been well understood. Halo mass function cross substellar limit has not been measured. We used UKIDSS and SDSS to search for L subdwarfs. We have confirmed some new L subdwarfs and are following up more candidates with ground based large telescopes. We discussed spectral features of L subdwarfs and halo brown dwarfs.
© Owned by the authors, published by EDP Sciences, 2013
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