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Observations and asteroseismological analysis of the rapid subdwarf B pulsator EC 09582-1137
S. K. Randall, V. Van Grootel, G. Fontaine +2
We made photometric and spectroscopic observations of the rapidly pulsating subdwarf B star EC 09582-1137 with the aim of determining the target's fundamental structural parameters…
A NLTE model atmosphere analysis of the pulsating sdO star SDSS J1600+0748
M. Latour, G. Fontaine, P. Brassard +2
We started a program to construct several grids of suitable model atmospheres and synthetic spectra for hot subdwarf O stars computed, for comparative purposes, in LTE, NLTE, with…
Follow-up Observations of the Second and Third Known Pulsating Hot DQ White Dwarfs
P. Dufour, E. M. Green, G. Fontaine +3
We present follow-up time-series photometric observations that confirm and extend the results of the significant discovery made by Barlow et al.(2008) that the Hot DQ white dwarfs…
Pulsation in carbon-atmosphere white dwarfs: A new chapter in white dwarf asteroseismology
G. Fontaine, P. Brassard, P. Dufour +2
We present some of the results of a survey aimed at exploring the asteroseismological potential of the newly-discovered carbon-atmosphere white dwarfs. We show that, in certains re…