2002/10/17 by S. J. O’Toole, S. J. O'Toole, T. R. Bedding +6
Physics and Astronomy · #Adaptive optics and wavefront sensing #Pulsars and Gravitational Waves Research #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0210395
4 pages, 3 figures, to appear in "Asteroseismology Across the HR Diagram" (Porto, July 2002), Eds. Thompson M.J., Cunha M.S. and Monteiro M.J.P.F.G. (Kluwer)
arxiv created 2002/10/17 · arxiv updated 2009/12/01
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 extreme horizontal branch, and it is uncertain whether it pulsates in p- or g-modes. Previous studies of PG 1605+072 have found amplitude variation and/or very closely spaced frequencies. We compare our velocity measurements with new simultaneous spectrophotometric measurements and analyse phase differences for the 8 frequencies found in velocity. Phase differences between velocity, spectrophotometry and equivalent width are discussed.