The WFCAM transit survey and cool white dwarfs

S. Catalan, R. Napiwotzki, S. Hodgkin, D. Cristobal Hornillos, D. Pinfield, Roberto Saglia
2013 EPJ Web of Conferences  
We present results from our search for cool white dwarfs in the WTS (WFCAM Transit Survey). Repeat observations starting in 2007 allowed to produce deep stacked images in J and measure proper motions. We combine this with deep optical imaging to select cool white dwarf candidates (T eff < 5000 K). About 27 cool white dwarf candidates with proper motions above 0.10 arcsec/yr were identified in one of the fields representing 1/8th of the survey area. Follow-up spectroscopy with the 10.2 m GTC
more » ... scope at La Palma confirmed the white dwarf status for all observed candidates. On-going work is being carried out to increase the sample of cool white dwarfs that will allow a more comprehensive study of the thick disk/halo white dwarf population.
doi:10.1051/epjconf/20134706005 fatcat:wlc4ezn4avfk5i27qg6jpvylqq