2009/06/30 by Ravi Sankrit, W. Van Dyke Dixon
Physics and Astronomy · #Astronomy and Astrophysical Research #Scientific Research and Discoveries #Stellar, planetary, and galactic studies #astro-ph.GA #astro-ph.SR
paper · pdf · doi:10.1088/0004-637x/701/1/481
published as Astrophys.J.701:481-487,2009 · 21 pages, including 3 figures and 2 tables. Accepted for publication in the Astrophysical Journal. Minor change: a few uncited references removed
arxiv created 2009/07/02 · openalex publication_date 2009/07/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We present observations of O vi λ1032 emission around the helium white dwarf KPD 0005+5106 obtained with the Far Ultraviolet Spectroscopic Explorer . Previously published data, reprocessed with an updated version of the calibration pipeline, are included along with new observations. The recent upward revision of the white dwarf's effective temperature to 200,000 K has motivated us to re-analyze all the data. We compare observations with photoionization models and find that the density of the O vi nebula is about 10 cm −3 , and that the stellar flux must be attenuated by about 90% by the time it impinges on the inner face of the nebula. We infer that this attenuation is due to circumstellar material ejected by KPD 0005+5106 earlier in its evolution.