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dc.contributor.authorHolberg, Jay B.
dc.contributor.authorSión, Edward M.
dc.contributor.authorOswalt, T. D.
dc.contributor.authorMcCook, George P.
dc.contributor.authorForan, S.
dc.contributor.authorSubasavage, John P.
dc.date.accessioned2017-06-13T21:23:46Z
dc.date.available2017-06-13T21:23:46Z
dc.date.issued2008-04
dc.identifier.citationHolberg, J. B., Sion, E. M., Oswalt, T., McCook, G. P., Foran, S., & Subasavage, J. P. (2008). A new look at the local white dwarf population. Astronomical Journal, 135(4), 1225-1238. doi:10.1088/0004-6256/135/4/1225en_US
dc.identifier.urihttp://hdl.handle.net/11141/1574
dc.description.abstractWe have conducted a detailed new survey of the local population of white dwarfs lying within 20 pc of the Sun. A new revised catalog of local white dwarfs containing 122 entries (126 individual degenerate stars) is presented. This list contains 27 white dwarfs not included in a previous list from 2002, as well as new and recently published trigonometric parallaxes. In several cases new members of the local white dwarf population have come to light through accurate photometric distance estimates. In addition, a suspected new double degenerate system (WD 0423+120) has been identified. The 20 pc sample is currently estimated to be 80% complete. Using a variety of recent spectroscopic, photometric, and trigonometric distance determinations, we re-compute a space density of 4.8 0.5 × 10-3 pcˉ³ corresponding to a mass density of 3.2 0.3 × 10ˉ³ M ⊙ pcˉ³ from the complete portion of the sample within 13 pc. We find an overall mean mass for the local white dwarfs of 0.665 M ⊙, a value larger than most other non-volume-limited estimates. Although the sample is small, we find no evidence of a correlation between mass and temperature in which white dwarfs below 13,000 K are systematically more massive than those above this temperature. Within 20 pc 25% of the white dwarfs are in binary systems (including double degenerate systems). Approximately 6% are double degenerates and 6.5% are Sirius-like systems. The fraction of magnetic white dwarfs in the local population is found to be 13%.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is made available in accordance with publishers policy. It may be subject to U.S. copyright law.en_US
dc.rights.urihttps://aas.org/publications/aas-copyright-policyen_US
dc.titleA new look at the local white dwarf populationen_US
dc.typeArticleen_US
dc.identifier.doi10.1088/0004-6256/135/4/1225


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