https://doi.org/10.1051/epjconf/20134706007
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: zenghuazhang@gmail.com
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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
