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7 papers · 1 filter
Orbital and Evolutionary Constraints on the Planet Hosting Binary GJ 86 from the Hubble Space Telescope
J. Farihi, Howard E. Bond, P. Dufour +5
This paper presents new observations of the planet-hosting, visual binary GJ 86 (HR 637) using the Hubble Space Telescope. Ultraviolet and optical imaging with WFC3 confirms the st…
Scars of Intense Accretion Episodes at Metal-Rich White Dwarfs
J. Farihi, B. T. Gänsicke, M. C. Wyatt +3
A re-evaluation of time-averaged accretion rates at DBZ-type white dwarfs points to historical, time-averaged rates significantly higher than the currently observed episodes at the…
X-ray and Infrared Observations of Two Externally-Polluted White Dwarfs
M. Jura, M. P. Muno, J. Farihi +1
With XMM-Newton and the Spitzer Space Telescope, we obtain upper bounds to the X-ray fluxes from G29-38 and GD 362, and the 70 micron flux from G29-38. These data provide indirect…
57 second oscillations in Nova Centauri 1986 (V842 Cen)
P. A. Woudt, B. Warner, J. Osborne +1
High speed photometry in 2008 shows that the light curve of V842 Cen possesses a coherent modulation at 56.825 s, with sidebands at 56.598 s and 57.054 s. These have appeared since…
A new detailed examination of white dwarfs in NGC3532 and NGC2287
P. D. Dobbie, R. Napiwotzki, M. R. Burleigh +5
We present the results of a photometric and spectroscopic study of the white dwarf candidate members of the intermediate age open clusters NGC3532 and NGC2287. Of the nine objects…
Mass transfer in eccentric binaries: the new Oil-on-Water SPH technique
Ross P. Church, Johann Dischler, Melvyn B. Davies +3
To measure the onset of mass transfer in eccentric binaries we have developed a two-phase SPH technique. Mass transfer is important in the evolution of close binaries, and a key is…