Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-04-10
Astronomy and Astrophysics
Astrophysics
7 pages, LaTeX, 7 encapsulated postscript figures, uses aa.cls, to appear in Astronomy & Astrophysics
Scientific paper
We report new determinations of the radius and mass of the pulsating helium-rich, hydrogen-deficient star LSS 3184 (BX Cir) using measurements of radial velocity and angular radius throughout its pulsation cycle. Measurements of radial velocity, and thus changes in stellar radius, were made using Anglo-Australian Telescope echelle spectra. Hubble Space Telescope ultraviolet spectra and ground-based BV photometry were used to find temperatures and fluxes throughout the pulsation cycle. The temperatures and fluxes were used to find the angular radius of the star (alpha). The alpha, Delta-alpha and Delta-radius values thus found were used to calculate the mean stellar radius
Jeffery Simon C.
Woolf Vincent M.
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