2008/10/29 by A. Gianninas, A Gianninas, P. Bergeron +3 · 1 citation
Engineering · Physics and Astronomy · #Astronomy and Astrophysical Research #Space Technology and Applications #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1088/1742-6596/172/1/012021
published as J.Phys.Conf.Ser.172:012021,2009 · 8 pages, 7 figures, to appear in Journal of Physics Conference Proceedings for the 16th European White Dwarf Workshop
arxiv created 2008/10/29 · openalex publication_date 2009/06/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
For some years now, we have been gathering optical spectra of DA white dwarfs in an effort to study and define the empirical ZZ Ceti instability strip. However, we have recently expanded this survey to include all the DA white dwarfs in the McCook & Sion catalog down to a limiting visual magnitude of V = 17.5. We present here a spectroscopic analysis of over 1000 DA white dwarfs from this ongoing survey. We have several specific areas of interest most notably the hot DAO white dwarfs, the ZZ Ceti instability strip, and the DA+dM binary systems. Furthermore, we present a comparison of the ensemble properties of our sample with those of other large surveys of DA white dwarfs, paying particular attention to the distribution of mass as a function of effective temperature.