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Time-series Spectroscopy of Pulsating sdB stars III: Line Indices of PG1605+072
S. J. O'Toole, M. A. S. G. Joergensen, H. Kjeldsen +3
We present the detection and analysis of line index variations in the pulsating sdB star PG 1605+072. We have found a strong dependence of line index amplitude on Balmer line order…
A 6.3-h superhump in the cataclysmic variable TV Columbae: the longest yet seen
A. Retter, C. Hellier, T. Augusteijn +5
We present results from a two week multi-longitude photometric campaign on TV Col held in 2001 January. The data confirm the presence of a permanent positive superhump found in re-…
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…
Simultaneous Optical and X-ray Observations of Flares and Rotational Modulation on the RS CVn Binary HR 1099 (V711 Tau) from the MUSICOS 1998 Campaign
D. Garcia-Alvarez, B. H. Foing, D. Montes +2
We present simultaneous and continuous observations of the H, H, He {\sc i} D, Na {\sc i} D,D doublet and the Ca {\sc ii} H & K lines for the RS CVn system…
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…