22 papers
Time-resolved spectroscopy and spectrophotometry of the pulsating sdB star PG 1605+072
S. J. O'Toole, T. R. Bedding, H. Kjeldsen +1
We present the latest results from our analysis of time resolved spectroscopy of PG 1605+072, a high amplitude pulsating sdB star. The star is believed to have evolved off the extr…
Solar-like oscillations in semiregular variables
Timothy R. Bedding
Power spectra of the light curves of semiregular variables, based on visual magnitude estimates spanning many decades, show clear evidence for stochastic excitation. This supports…
Oscillations in alpha Cen A observed with UCLES at the AAT
T. R. Bedding, R. P. Butler, C. McCarthy +5
We report Doppler measurements of alpha Cen A from time-series spectroscopy made with UCLES at the 3.9-m AAT. Wavelength calibration using an iodine absorption cell produced high-p…
Evidence for Solar-like Oscillations in Arcturus (Alpha Boo)
Alon Retter, Timothy R. Bedding, Derek Buzasi +1
Observations of the red giant Arcturus (Alpha Boo) obtained with the star tracker on the Wide Field Infrared Explorer (WIRE) satellite during a baseline of 19 successive days in 20…
Confirmation of Solar-Like Oscillations in eta Bootis
H. Kjeldsen, T. R. Bedding, I. K. Baldry +9
We report observations of the G0 subgiant eta Boo made in 1998, in Balmer-line equivalent width with the 2.5-m Nordic Optical Telescope and in velocity with the 24-inch Lick CAT. I…
Solar-Like Oscillations in beta Hydri: Evidence for Short-Lived High-Amplitude Oscillations
T. R. Bedding, H. Kjeldsen, I. K. Baldry +7
Velocity measurements of the G2 subgiant beta Hyi with both UCLES and CORALIE show a clear excess of power centred at 1.0 mHz. In the UCLES data we find evidence for a short-lived,…