Communications in Asteroseismology Volume 159 March, 2009 Proceedings of the JENAM 2008 Symposium No 4: Asteroseismology and Stellar Evolution Vienna, 8 – 12 September, 2008 edited by Sonja Schuh & Gerald Handler Communications in Asteroseismology Editor-in-Chief: Michel Breger, [email protected] Editorial Assistant: Daniela Klotz, [email protected] Layout & Production Manager: Paul Beck, [email protected] CoAst Editorial and Production Office T¨urkenschanzstraße 17, A - 1180 Wien, Austria http://www.univie.ac.at/tops/CoAst/ [email protected] Editorial Board: Conny Aerts, Gerald Handler, Don Kurtz, Jaymie Matthews, Ennio Poretti Cover Illustration Conference poster of the Joint European and National Astronomy Meeting 2008 showing the Maria-Theresien-Statue in front of the Kunsthistorisches Museum in Vienna, against a background of a galaxy field in Fornax as seen by HST’s Advanced Camera for Surveys. (Poster created by Stefan Hirche, and adapted for CoAst by Katrien Kolenberg.) British Library Cataloguing in Publication data. A Catalogue record for this book is available from the British Library. All rights reserved ISBN 978-3-7001-6625-2 ISSN 1021-2043 Copyright c 2009 by Austrian Academy of Sciences Vienna Austrian Academy of Sciences Press A-1011 Wien, Postfach 471, Postgasse 7/4 Tel. +43-1-515 81/DW 3402-3406, +43-1-512 9050 Fax +43-1-515 81/DW 3400 http://verlag.oeaw.ac.at, e-mail: [email protected] Comm. in Asteroseismology, Vol. 159, 2009, JENAM 2008 Symposium No 4: Asteroseismology and Stellar Evolution S. Schuh & G. Handler Preface The Joint European and National Astronomy Meeting 2008 (JENAM 2008) was held from September 8-12, 2008 in Vienna, Austria, as the joint meeting of the Austrian Society of Astronomy and Astrophysics (OGAA),¨ the Astronomische Gesellschaft (AG), and the Eu- ropean Astronomical Society (EAS). It hosted nine symposia under the overall topic ”New Challenges To European Astronomy”. This special volume of Communications in Asteroseis- mology holds the proceedings of the JENAM 2008 Symposium No 4: ”Asteroseismology and Stellar Evolution”. The Asteroseismology and Stellar Evolution Symposium has been gen- erously sponsored by the OGAA,¨ by the HELAS Forum (an activity of the European Helio- and Asteroseismology Network, initiative funded by the European Commission since April 1st, 2006, as a Co-ordination Action under its Sixth Framework Programme, FP6), and by the Kulturabteilung der Stadt Wien (Magistratsabteilung 7). The Symposium program was put together by the Scientific Organizing Committee con- sisting of Conny Aerts (University of Leuven, Belgium), Annie Baglin (Observatoire de Paris, France), Wolfgang Glatzel (University of G¨ottingen, Germany), Gerald Handler (University of Vienna, Austria, Co-convener), Uli Heber (University of Erlangen-N¨urnberg, Germany), Katrien Kolenberg (University of Vienna, Austria), Suzanna Randall (European Southern Ob- servatory) and Sonja Schuh (University of G¨ottingen, Germany, Convener). Out of a total of 60 oral and poster contributions, 15 contributed talks were selected for presentation during the three half-day session program, with ample time for questions and discussion. There also was an opportunity to introduce the poster contributions during 2-min oral presentations. The scientific topics covered diverse object classes divided into Stochastically excited pulsators (main sequence, red giants, AGB supergiants), Heat-driven pulsators along the main sequence, and Compact pulsators, as well as additional topics that we have summarized as contributions on Eruptive variable and binary stars, and contributions presenting Methods and tools. The three session topics were introduced by two invited review speakers per field. In the first session, Jadwiga Daszynska-Daszkiewicz summarized current ”Challenges for stellar pulsation and evolution theory”, and Konstanze Zwintz reported ”A preliminary glimpse on CoRoT results and expectations” (for Eric Michel), together giving an overview of the observational and theoretical status of the field. Anne Thoul and Oleg Kochukhov presented the state of the art in ”Asteroseismology of B stars” and ”Asteroseismology of chemically peculiar stars”, respectively, in the second session, highlighting the hot issues in understanding and interpreting the pulsational behaviour of these groups. The stellar evolution aspect was given special consideration in ”Asteroseismology and evolution of EHB stars” by Roy Østensen and ”Asteroseismology and evolution of GW Vir stars” by Pierre-Oliver Quirion in the concluding third session. A dedicated audience (on average 45 participants in each session), the excellent speakers, and our colleague Patrick Lenz who acted as the friendly and competent technician made this Symposium a highly interesting, enjoyable and successful event. We would like to thank all speakers, poster authors, and participants for coming to Vienna, the SOC and the referees for their work, the local organizers at Vienna for providing all the necessary infrastructure, and all sponsors for having made possible this event and the proceedings at hand. Sonja Schuh and Gerald Handler Proceedings Editors Preface by S. Schuh and G. Handler, Proceedings Editors 3 Stochastically excited pulsators (main sequence, red giants, AGB) Challenges for stellar pulsation and evolution theory by J. Daszy´nska-Daszkiewicz 7 µ Herculis: Analysis of EW time series of a solar-type pulsator by E. Carolo, R. Claudi, S. Benatti, and A. Bonanno 19 Asteroseismology of solar–type stars with SARG@TNG by R. Claudi, S. Benatti, A. Bonanno, M. Bonavita, S. Desidera, et al. 21 Using p-mode excitation rates for probing convection in solar-like stars by F. Kupka, K. Belkacem, M.-J. Goupil, and R. Samadi 24 Further progress on solar age calibration by G.Houdek and D.O.Gough 27 Parametric interaction of coronal loops with p modes by A.V.Stepanov, V.V.Zaitsev, A.G.Kisliakov, and S.Urpo 30 A preliminary glimpse on CoRoT results and expectations by E. Michel, K. Zwintz, and the CoRoT team 33 Heat-driven pulsators along the main sequence Asteroseismology of B stars by A.Thoul 35 ”Hybrid” pulsators - fact or fiction? by G. Handler 42 TW Dra: NRP mode identification with FAMIAS by H. Lehmann, A. Tkachenko, and D. E. Mkrtichian 45 Preliminary results of V440 Per and α UMi observations with the Poznan Spectroscopic Telescope by M. Fagas, R. Baranowski, P. Bartczak, W. Borczyk, W. Dimitrow, et al. 48 2D modeling of a Cepheid, moving grid approach by E. Mundprecht 51 Blazhko variables – recent results by J. Jurcsik 53 CZ Lacertae – a Blazhko RR Lyrae star with multiperiodic modulation by A.´ S´odor 55 The true Blazhko behaviour of DM Cyg by Zs. Hurta 57 Asteroseismology of pre-main sequence stars by K.Zwintz, D.B.Guenther, and T.Kallinger 59 Asteroseismology of chemically peculiar stars by O.Kochukhov 61 The pulsating component of the B[e]/X-Ray transient and multiple system CI Cam by E.A.Barsukova and V.P.Goranskij 71 Compact pulsators Asteroseismology and evolution of EHB stars by R.H. Østensen 77 A search for Extreme Horizontal Branch pulsators in ω Cen by S. K. Randall, A. Calamida, and G. Bono 90 Time-resolved spectroscopy of the planet-hosting sdB pulsator V391 Pegasi by S. Schuh, R. Kruspe, R. Lutz, and R. Silvotti 93 Long-term EXOTIME photometry and follow-up spectroscopy of the sdB pulsator HS 0702+6043 by R. Lutz, S. Schuh, R. Silvotti, R. Kruspe, and S. Dreizler 96 Search for sdB/WD pulsators in the Kepler FOV by R. Silvotti, G. Handler, S. Schuh, B. Castanheira, and H. Kjeldsen 99 Asteroseismology and evolution of GW Vir stars by P.-O. Quirion 101 UV spectroscopy of the hybrid PG 1159-type central stars of the planetary nebulae NGC7094 and Abell43 by M. Ziegler, T. Rauch, K. Werner, L. Koesterke, and J. W. Kruk 109 Eruptive variable and binary stars Towards a dynamical mass of a PG 1159 star: radial velocities and spectral analysis of SDSS J212531−010745 by B. Beeck, S. Schuh, T. Nagel, and I. Traulsen 113 TT Arietis – observations of a Cataclysmic Variable Star with the MOST Space Tele- scope by J. Weingrill, G. Kleinschuster, R. Kuschnig, J. M. Matthews, A. Moffat, et al. 116 A progress report on the study of the optical variability of the old nova HR Del by I. Voloshina, M. Friedjung, M. Dennefeld, and V. Sementsov 119 A study of the atmospheric structure of AX Mon (HD 45910) by A.Antoniou, E.Danezis, E.Lyratzi, L.C.ˇ Popovi´c, M. S. Dimitrijevi´c, et al. 121 η Carinae - The outer ejecta by K. Weis 123 Methods and tools Time series analysis with the VSAA method by S. Tsantilas, K. Kolenberg, and H. Rovithis-Livaniou 127 Mapping pulsations on rapidly rotating components of eclipsing binaries by B. I. B´ır´oand O. Latkovi´c 129 Physical parameters of contact binaries through 2-D and 3-D correlation diagrams by K. D. Gazeas 131 Musical scale estimation for some multiperiodic pulsating stars by B. Ula¸s 133 Cocktail reception at Vienna City Hall. Comm. in Asteroseismology, Vol. 159, 2009, JENAM 2008 Symposium No 4: Asteroseismology and Stellar Evolution S. Schuh & G. Handler Challenges for stellar pulsation and evolution theory J. Daszy´nska-Daszkiewicz Instytut Astronomiczny, Uniwersytet Wroc lawski, Kopernika 11, 51-622 Wroclaw, Poland Abstract During the last few decades, great effort has been made towards understanding hydrodynam- ical processes which determine the structure and evolution of stars. Up to now, the most stringent constraints have been provided by helioseismology and stellar cluster studies. How- ever, the contribution of asteroseismology becomes more and more important, giving us an opportunity to probe the interiors and atmospheres of very different stellar objects. A vari- ety of pulsating variables allows us to test various parameters of micro- and macrophysics by means of oscillation data. I will review the most outstanding key problems, both observational and theoretical, of which our knowledge can be improved by means of asteroseismology.