Metal abundances in the hottest known DO white dwarf (KPD 0005+5106)
نویسندگان
چکیده
منابع مشابه
Discovery of photospheric Ca X emission lines in the far - UV spectrum of the hottest known white dwarf ( KPD 0005 + 5106 ) ⋆
For the first time, we have identified photospheric emission lines in the far-UV spectrum of a white dwarf. They were discovered in the Far Ultraviolet Spectroscopic Explorer spectrum of the hot (Teff ≈ 200 000 K) DO white dwarf KPD 0005+5106 and they stem from extremely highly ionized calcium (Ca X λλ 1137, 1159 Å). Their photospheric origin is confirmed by non-LTE line-formation calculations....
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We have detected an ionized nebula around the hot DO white dwarf KPD0005+5106, and used the [O III]/Hα ratios and nebular velocities to separate this nebula from the background H II region of AO Cas. The angular size of the [O III] nebula of KPD0005+5106 is∼ 3. The velocity of this nebula is similar to those of the local interstellar H I gas and the interstellar/circumstellar absorption lines i...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2010
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201015007