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Full-Text Articles in Physical Sciences and Mathematics
Sph Simulations Of Direct Impact Accretion In The Ultracompact Am Cvn Binaries, Joshua Dolence, Matt A. Wood, Isaac Silver
Sph Simulations Of Direct Impact Accretion In The Ultracompact Am Cvn Binaries, Joshua Dolence, Matt A. Wood, Isaac Silver
Aerospace, Physics, and Space Science Faculty Publications
The ultracompact binary systems V407 Vul (RX J1914.4+2456) and HM Cnc (RX J0806.3+1527), a two-member subclass of the AM CVn stars, continue to generate interest because they defy unambiguous classification. Three proposed models remain viable at this time, but none of the three are significantly more compelling than the remaining two, and all three can satisfy the observational constraints if parameters in the models are tuned. One of the three proposed models is the direct impact model of Marsh & Steeghs, in which the accretion stream impacts the surface of a rapidly rotating primary white dwarf directly, but at a …
A New Look At The Local White Dwarf Population, Jay B. Holberg, Edward M. Sion, Terry D. Oswalt, George P. Mccook, S Foran, John P. Subasavage
A New Look At The Local White Dwarf Population, Jay B. Holberg, Edward M. Sion, Terry D. Oswalt, George P. Mccook, S Foran, John P. Subasavage
Aerospace, Physics, and Space Science Faculty Publications
We 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 …
Orbital Parameters And Chemical Composition Of Four White Dwarfs In Post-Common-Envelope Binaries, Adéla Kawka, Stéphane Vennes, Jean François Dupuis, Pierre Chayer, Thierry M. Lanz
Orbital Parameters And Chemical Composition Of Four White Dwarfs In Post-Common-Envelope Binaries, Adéla Kawka, Stéphane Vennes, Jean François Dupuis, Pierre Chayer, Thierry M. Lanz
Aerospace, Physics, and Space Science Faculty Publications
We present FUSE observations of the hot white dwarfs in the post-common-envelope binaries Feige 24, EUVE J0720-317, BPM 6502, and EUVE J2013+400. The spectra show numerous photospheric absorption lines, which trace the white dwarf orbital motion. We report the detection of C III, O VI, P V, and Si IV in the spectra of Feige 24, EUVE J0720-317, and EUVE J2013+400 and the detection of C III, N II, Si III, Si IV, and Fe III in the spectra of BPM 6502. Abundance measurements support the possibility that white dwarfs in post-common-envelope binaries accrete material from the secondary star wind. …