Subaru and Swift observations of V652 Herculis: resolving the photospheric pulsation★
Subaru and Swift observations of V652 Herculis: resolving the photospheric pulsation★
High resolution spectroscopy with the Subaru High Dispersion Spectrograph, and Swift ultraviolet photometry are presented for the pulsating extreme helium star V652\,Her. Swift provides the best relative ultraviolet photometry obtained to date, but shows no direct evidence for a shock at ultraviolet or X-ray wavelengths. Subaru has provided high spectral …