KPD 0005 + 5106
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Star KPD 0005 + 5106 |
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| AladinLite | |||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Cassiopeia | ||||
| Right ascension | 00 h 08 m 18.17 s | ||||
| declination | + 51 ° 23 ′ 16.6 ″ | ||||
| Apparent brightness | 13.32 mag | ||||
| Typing | |||||
| B − V color index | −0.28 | ||||
| U − B color index | −1.24 | ||||
| Spectral class | DO | ||||
| Astrometry | |||||
| parallax | (2.58 ± 0.05) mas | ||||
| distance | (1264 ± 25) ly 390 pc |
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| Proper movement | |||||
| Rec. Share: | (+29.83 ± 0.06) mas / a | ||||
| Dec. portion: | (-0.49 ± 0.05) mas / a | ||||
| Physical Properties | |||||
| Dimensions | 0.64 M ☉ | ||||
| radius | 0.06 R ☉ | ||||
| Luminosity |
5000 L ☉ |
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| Effective temperature | 200,000 K | ||||
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Other names and catalog entries |
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KPD 0005 + 5106 is a white dwarf in the constellation Cassiopeia . With a surface temperature of 200,000 Kelvin , it is the hottest known white dwarf (as of 2009). As a "pre-white dwarf", the star is probably still in the helium-burning stage , shortly before nuclear fusion finally comes to a standstill.
Individual evidence
- ↑ a b c d e f KPD 0005 + 5106. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on November 12, 2018 .
- ↑ a b Werner et al .: Discovery of photospheric Ca X emission lines in the far-UV spectrum of the hottest known white dwarf (KPD 0005 + 5106) . In: Astronomy & Astrophysics . 492, No. 3, 2008, pp. L43-L47. bibcode : 2008A & A ... 492L..43W . doi : 10.1051 / 0004-6361: 200811126 .
- ↑ a b c d D. Wassermann, K. Werner, T. Rauch, JW Kruk: Metal abundances in the hottest known DO white dwarf (KPD0005 + 5106) . In: Astronomy & Astrophysics . 524, 2010, p. A9. bibcode : 2010A & A ... 524A ... 9W . doi : 10.1051 / 0004-6361 / 201015007 .