New Whole Earth Telescope observations of CD-24 7599: Steps towards d Scuti star seismology

Author(s): Gerald Handler, Holger Pikall, Darragh O'Donoghue, David A H Buckley, G Vauclair, M Chevreton, O Giovannini, S O Kepler, Philip R. Goode, Judi L. Provencal, Matt A. Wood, J. Christopher Clemens, M. Sean O'Brien, R. Edward Nather, Beverley J. Winget, Scot J. Kleinman, Antonio Kanaan, Todd K. Watson, Atsuko Nitta, Michael H. Montgomery, Eric W. Klumpe, Paul A. Bradley, Denis J. Sullivan, K Wu, T M K Marar, S Seetha, B N Ashoka, H S Mahra, B C Bhat, V C Babu, Elia M. Leibowitz, S Hemar, P. A. Ibbetson, E Mashal, E G Meistas, Wojciech A. Dziembowski, Aleksiej Pamiatnych, Pawel A. Moskalik, S Zola, G Pajdosz, J Krzesinski, Jan Erik Solheim, S Bard, C M Massacand, Michel Breger, Michael Gelbmann, Ernst Paunzen, Pierre North
Abstract: 92 h of new Whole Earth Telescope observations have been acquired for the d Scuti star CD-24 7599. All the seven pulsation modes reported by Handler et al. are confirmed. However, significant amplitude variations which are not caused by beating of closely spaced frequencies occurred within two years. Analysing the combined data of both WET runs, we detect six further pulsation modes, bringing the total number up to 13. We also examine our data for high-frequency pulsations similar to those exhibited by rapidly oscillating Ap stars, but we do not find convincing evidence for variability in this frequency domain. Œ 1997 RAS.
Organisation(s): Department of Astrophysics
External organisation(s): University of Cape Town, South African Astronomical Observatory (SAAO), Observatoire Midi-Pyrénées, Université de recherche Paris Sciences et Lettres, Universidade Federal do Rio Grande do Sul, New Jersey Institute of Technology, University of Delaware, Florida Institute of Technology, University of North Carolina at Chapel Hill, Yale University, University of Texas, Austin, Southwestern University, Apache Point Observatory, Los Alamos National Laboratory, Victoria University of Wellington, Australian National University, Indian Space Research Organization, Tel Aviv University, Vilnius University (VU), Nicolaus Copernicus University, Polish Academy of Sciences (PAS), Pedagogical University of Cracow, University of Oslo, University of Tromsø - The Arctic University of Norway, École polytechnique fédérale de Lausanne, University of Vienna
Journal: Monthly Notices of the Royal Astronomical Society
Volume: 286
Pages: 303-314
No. of pages: 12
ISSN: 0035-8711
DOI: https://doi.org/10.1093/mnras/286.2.303
Publication date: 1997
Peer reviewed: Yes
Austrian Fields of Science 2012: 103003 Astronomy
Portal url: https://ucrisportal.univie.ac.at/en/publications/2e3fc07f-f78e-4def-8ae1-83c5c065c41b

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