A double white dwarf with a paradoxical origin?

M C P Bours,T R Marsh,B T Gaensicke,T M Tauris,A G Istrate,Carles Badenes,V S Dhillon,Avishay Galyam,J J Hermes, S Kengkriangkrai,Mukremin Kilic,D Koester,F Mullally, N Prasert,D Steeghs,Susan E Thompson,John R Thorstensen

Monthly Notices of the Royal Astronomical Society（2015）

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摘要

We present Hubble Space Telescope UV spectra of the 4.6-h-period double white dwarf SDSS J125733.63+542850.5. Combined with Sloan Digital Sky Survey optical data, these reveal that the massive white dwarf (secondary) has an effective temperature T2 = 13 030 ± 70 ± 150 K and a surface gravity log g2 = 8.73 ± 0.05 ± 0.05 (statistical and systematic uncertainties, respectively), leading to a mass of ...

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关键词

binaries: close,stars: individual: SDSS J125733.63+542850.5,white dwarfs

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