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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  

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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
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S. Catalan, R. Napiwotzki, S. Hodgkin, D. Cristobal Hornillos, D. Pinfield, Roberto Saglia. "The WFCAM transit survey and cool white dwarfs." EPJ Web of Conferences (2013) 06005