Abstract
We present the first results from the MultiSite Spectroscopic Telescope (MSST) observations of the sdBV star PG 1605+072. Pulsating sdB stars (also known as EC 14026 stars) offer the chance to gain new insights into the formation and evolution of extreme Horizontal Branch stars using the tools of asteroseismology. PG 1605+072 is an outstanding object in its class, with the richest frequency spectrum, the longest periods, and the largest variations.
The MSST campaign took place in May/June 2002 immediately following the Whole Earth Telescope Xcov22 run, which observed PG 1605+072 as an alternate target. We will first give an overview of the project and its feasibility, after which we will present the massive data set, made up of 399 h of photometry and 151 h of spectroscopy. The overall aims of the project are to examine light/velocity amplitude ratios and phase differences, changes in equivalent width/line index, and λ-dependence of photometric amplitudes, and to use these properties for mode identification.
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References
Falter, S., Heber, U., Dreizler, S., Schuh, S.L., Cordes, O.-M. and Edelmann, H.: 2003, A&A 401, 289.
Heber, et al.: 2003, 13th European Workshop on White Dwarfs, NATO-ARW Workshop Series, p. 105.
Heber, U., Reid, I.N. and Werner, K.: 1999,A&A 348, 25.
Kawaler., S.D.: 1999, in: J.-E. Solheim and E.G. Meistas (eds.), Proc. of the 11th EuropeanWorkshop on White Dwarfs, ASP Conference Series, vol. 169, 158.
Kilkenny, D., Koen, C., O’Donoghue, D. et al.: 1999, MNRAS 303, 525.
Koen, C., O’Donoghue, D., Kilkenny, D., Lynas-Gray, A.E., Marang, F. and van Wyk, F.: 1998, MNRAS 296, 317.
østensen, R. and Telting, J.H.: 2004, in: P.F.L. Maxted (ed.), Extreme Horizontal Branch Stars and Related Objects, Ap&SS 291, 449.
O’Toole, S.J.: 2003, PhD Thesis, University of Sydney.
O’Toole, S.J., Bedding, T.R., Kjeldsen, H. et al.: 2000,ApJ 537, L53.
O’Toole, S.J., Bedding, T.R., Kjeldsen, H., Dall, T.H. and Stello, D.: 2002, MNRAS 334, 471.
O’Toole, S.J., Jørgensen, M.A.S.G., Bedding, T.R., Kjeldsen, H., Dall T.H. and Heber, U.: 2003, MNRAS 340, 856.
Reed M.: 2001, PhD Thesis, Iowa State University.
Schuh S.L., Dreizler, S., Deetjen, J.L. and Göhler, E.: 2003, Baltic Astron. 12, 167.
Woolf, V.M., Jeffery, C.S. and Pollacco, D.: 2002, MNRAS 339, 497.
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O’Toole, S., Falter, S., Heber, U. et al. MSST observations of the pulsating sdB star PG 1605+072. Astrophys Space Sci 291, 457–464 (2004). https://doi.org/10.1023/B:ASTR.0000044360.79737.38
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DOI: https://doi.org/10.1023/B:ASTR.0000044360.79737.38