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White Dwarfs NATO Science Series ASeriespresentingtheresultsofscientificmeetingssupportedundertheNATOScience Programme. TheSeriesispublishedbylOSPress,Amsterdam,andKluwerAcademicPublishersinconjunction withtheNATOScientificAffairsDivision Sub-Series I. LifeandBehaviouralSciences lOSPress II. Mathematics,PhysicsandChemistry KluwerAcademicPublishers III.ComputerandSystemsScience lOSPress IV, EarthandEnvironmentalSciences KluwerAcademicPublishers V. ScienceandTechnologyPolicy lOSPress TheNATOScienceSeriescontinuestheseriesofbookspublishedformerlyastheNATOASISeries. The NATOScience Programmeofferssupportforcollaboration incivil sciencebetween scientistsof countriesoftheEuro-AtlanticPartnershipCouncil.Thetypesofscientificmeetinggenerallysupported are "Advanced Study Institutes" and "Advanced Research Workshops", although other types of meeting are supported from time totime.The NATO Science Series collects togetherthe results of thesemeetings.Themeetingsareco-organizedbijscientistsfromNATOcountriesandscientistsfrom NATO'sPartnercountries- countriesoftheCISandCentralandEasternEurope. AdvancedStudyInstitutesarehigh-leveltutorialcoursesofferingin-depthstudyoflatestadvances inafield. Advanced ResearchWorkshops are expert meetings aimed atcritical assessmentofafield, and identificationofdirectionsforfutureaction. Asaconsequenceofthe restructuringoftheNATOScience Programmein 1999,the NATOScience Serieshasbeenre-organisedandtherearecurrentlyFiveSub-seriesasnotedabove.Pleaseconsult thefollowingwebsitesforinformationonpreviousvolumespublishedintheSeries,aswellasdetailsof earlierSub-series. http://www.nato.intlscience http://www.wkap.nl http:((www.iospress.nl http://www.wtv-books.de/nato-pco.htm I -~- I SeriesII:Mathematics,PhysicsandChemistry- Vol.105 White Dwarfs edited by Domitilla de Martino INAF - Osservatorio Astronomico di Capodimonte, Napels, Italy Roberto Silvotti INAF - Osservatorio Astronomico di Capodimonte, Napels, Italy Jan-Erik Solheim Universitetet i TromS0, Norway and Romualdas Kalytis Vilnius University, Vilnius, Lithuania Springer Science+Business Media, B.V. Proceedings of the NATO Advanced Research Workshop on White Dwarfs Naples, Italy 24-28 June 2002 A C.I.P. Catalogue record for this book is available from the Library of Congress. ISBN 978-1-4020-1364-5 ISBN 978-94-010-0215-8 (eBook) DOI 10.1007/978-94-010-0215-8 Printed on acid-free paper AII Rights Reserved ©2003 Springer Science+Business Media Dordrecht Originally published by Kluwer Academic Publishers in 2003 Softcover reprint of the hardcover 1s t edition 2003 No part of this work may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording or otherwise, without written permission from the Publisher, with the exception of any material supplied specifically for the purpose of being entered and executed on a computer system, for exclusive use by the purchaser of the work. Contents xvii Preface AV The WD people xix 1. White Dwarf Structure and Evolution On Oxygen-Neon white dwarfs 3 V. Weidemann Progenitor evolution and chemical stratification in CO 7 white dwarfs O. Straniero, G. Imbriani, L. Piersanti, I. Dominguez and P.G. Prada Moroni Convective coupling: a largely overlooked effect in cooling 11 white dwarfs G. Fontaine and P. Brassard Sinking of 22Ne in liquid WD interiors 15 C.J. Deloye and L. Bildsten From red giants to white dwarfs: a radiation-hydrodynamics 19 simulation of the planetary nebula stage D. Schonberner and M. Steffen The star formation rate from white dwarfs 23 E. Garcia-Berro, S. Torres and J. Isern New determination of 12C(a,')')160 reaction rate and impact on 25 WD models G. Imbriani, I. Dominguez, L. Gialanella, O. Straniero and F. Terrasi for ERNA collaboration The origin ofwhite dwarf rotation velocities 27 S.D. Kawaler, S. Hostler and J. Burkett 2. SNIa Progenitors Type Ia supernovae: constraints for the progenitor scenario 31 E. Cappellaro vi A new evolutionary path for the progenitors of type Ia supernovae 35 L. Piersanti, S. Gagliardi, A. Tornambe and 1. Iben Jr. Search for double degenerate progenitors of supernovae type Ia 39 with SPY R. Napiwotzki, H. Drechsel, U. Heber et al. Double degenerates from the Supernova Ia Progenitor Survey 43 (Spy) C. Karl, R. Napiwotzki, U. Heber et al. 3. Subdwarf B stars Subluminous B stars and progenitors ofhelium core white dwarfs 49 U. Heber The progeny of binary white dwarf mergers 53 C.S. Jeffery and H. Saio New subdwarf B star periods 57 L. Morales-Rueda, T.R. Marsh, R.C. North and P.F.L. Maxted SdB stars and the structure of the milky way 61 M. Altmann, K.S. de Boer and H. Edelmann High signal-to-noise ratio observations of EO 14026 pulsators 65 M. Billeres and G. Fontaine Fundamental parameters ofsdB pulsators from asteroseismology 69 S. Charpinet, G. Fontaine and P. Brassard Towards asteroseismology ofthe non-radial pulsating sdB 73 star PG 1605+072 S. Falter, U. Heber, S. Dreizler, S.L. Schuh and O. Cordes Pulsation period stability in the sdBV star HS 2201+2610 77 R. Silvotti and R. Kalytis Feige 48: a model match for the coolest pulsating subdwarfB star 81 M.D. Reed, S.D. Kawaler, S. Zola, X.J. Jiang and the WET Xcov 17, 19 & 21 teams vii MMT blue spectrograph observations of sdB stars: heavy elements 85 abundances P. Chayer, E.M. Green, G. Fontaine and R.A. Saffer Radial velocity variations and metal abundances of three bright 87 sdB stars H. Edelmann, U. Heber and C. Karl Preliminary results from CCD monitoring:light curves of 89 subdwarf B stars E.M. Green, I.R. Seitenzahl, K. Callerame et al. Physical parameters for subdwarfB stars with composite spectra 91 R. Aznar Cuadrado and C.S. Jeffery Are helium-rich subdwarfB stars the products ofwhite dwarf 93 mergers? A. Ahmad, C.S. Jeffery and V.M. Woolf Spectroscopic studies of the pulsating sdB binary PC 1336-018 95 V.M. Woolf, C.S. Jeffery and D. Pollacco Companions to subdwarfB stars - degenerate or non-degenerate? 97 P.F.L. Maxted, T.R. Marsh and L. Morales-Rueda Hot subdwarfs: further photometric observations of pulsating and 99 non pulsating objects J.M. Gonzalez Perez, R. Oreiro, A. Ulla et al. The temperature of the cool stars in three eclipsing binary systems 101 with the sdB components: HW Vir, PC 1336-018 and HS 0705+670 S. Zola, P. Niarchos and R. 0stensen Analysis of FUSE and IUE spectra of the sdOBstar EC 11481-2303 103 N.J. Hammer, J.L. Deetjen, S. Dreizler, K. Werner and J.W. Kruk Photometric and spectroscopic monitoring of the sdBV star 105 PC 1605+072: the Multi-Site Spectroscopic Telescope (MSST) project U. Heber, S. Dreizler, S.L. Schuh et al. Stellar wind signatures in sdB stars? 109 U. Heber, P.F.L. Maxted, T.R. Marsh, C. Knigge and J.E. Drew viii 4. Atmospheres and Chemical Composition A new determination of the spectroscopic mass and radius for 113 Sirius B J.B. Holberg, J.W. Kruk, D. Koester et al. Metal abundances in PG 1159 stars from CHANDRA and FUSE 117 spectroscopy K. Werner, J.L. Deetjen, S. Dreizler et al. High resolution EUV & FUV spectroscopy of DA white dwarfs 121 M.A. Barstow, S.A. Good, N.P. Bannister et al. Detection of photospheric 0 VI in the FUSE spectra of low 127 metallicity white dwarfs P. Chayer, C. Oliveira, J. Dupuis, H.W. Moos and B. Welsh FUSE observations ofthe DAO white dwarf Feige 55 131 J. Kruk, P. Chayer and J. Dupuis FUSE spectra of DO white dwarfs 135 S. Dreizler, K. Werner and J.W. Kruk Trace metals in cool DA white dwarfs 139 D. Koester, M. Hiinsch, B. Wolff, B. Zuckerman and LN. Reid Spectroscopic determination ofmass for a sample of DAO 143 white dwarfs S.A. Good, M.A. Barstow, M.R. Burleigh et al. Improved results for equilibrium abundances from diffusion 147 calculations S.L. Schuh, S. Dreizler and J.L. Deetjen Discovery ofoxygen in the DQ white dwarf star G 227-5 151 (PG 1727+560): a progress report H.L. Shipman, J.L. Provencal and J. MacDonald Spectral analysis of supra horizontal branch stars in globular 155 clusters M. Ramspeck, U. Heber, S. Moehler and LN. Reid Abundance patterns in hot DA atmospheres from FUSE 157 J. Dupuis, P. Chayer, J.W. Kruk and S. Vennes ix FUSE observations of the peculiar hot sdO star MCT 0019-2441 159 R. Lamontagne, P. Chayer, F. Wesemael et al. Lyman gamma satellites due to H-H+ collisions: application to 161 FUSE observations ofhot white dwarfs N.F. Allard, S. Bourdreux, J.F. Kielkopf et al. Quasi-molecular lines in Lyman wings ofcool DA white dwarfs; 163 application to FUSE observations of G231-40 N.F. Allard, G. Hebrard, R. Ferlet et al. Defining the red edge of the DB gap with PG 0112+104 165 P. Dufour, F. Wesemael, P. Bergeron et al. The FUSE spectrum of the DB white dwarf GD 190 167 N. Petitclerc, F. Wesemael, J.W. Kruk and P. Chayer Search for oxygen in cool DQ white dwarfatmospheres 169 M. Kilic, D.E. Winget, T. von Hippel, D.F. Lester and D. Saumon FUSE spectroscopy of the two prototype white dwarfs 171 with signatures of a super-hot wind K. Werner, S. Dreizler, J.W. Kruk and M.L. Sitko 5. Magnetic White Dwarfs Progress in modeling magnetic white dwarfs 175 S. Jordan Spectropolarimetric survey ofsouthern hydrogen-rich white dwarfs 179 A. Kawka, S. Vennes, D.T. Wickramasinghe, G.D. Schmidt and R. Koch Magnetic field evolution in accreting white dwarfs 183 A. Cumming Radiation-driven diskons 187 V.V. Zheleznyakov and A.V. Serber Constraints on the parameters of a magnetic white dwarf corona 191 imposed by its cyclotron emission V.V. Zheleznyakov, S.A. Koryagin and A.V. Serber xi Progress report on the hot DB PG 0112+104 235 J.L. Provencal, H.L. Shipman, R.L. Riddle and M. Vuckovic Period stability on pulsating white dwarfs 239 S.O. Kepler, J.E.S. Costa, D.E. Winget et al. Diffusion in variable DA white dwarfs 243 O. Benvenuto, A. Corsico, L. Althaus and A. Serenelli Disentangling the core from the envelope in pulsating 247 white dwarfstars M.H. Montgomery White dwarfseismology and the 12C(a,,)160 rate 251 T.S. Metcalfe Group behaviour of the pulsating DB white dwarfstars 255 G. Handler Asteroseismology of the DB star GD 358: improved evolutionary 259 models P. Brassard and G. Fontaine On mode trapping properties of full DA white dwarf evolutionary 261 models A. Corsico, L. Althaus, A. Serenelli and O. Benvenuto Preliminary results of the WET Xcov22 campaign at Calar Alto 263 observatory S.L. Schuh, T. Nagel, J.L. Deetjen et al. Search for magnetic fields among non-pulsators in the DAV 265 instability strip A. Kanaan, D.E. Winget and S.O. Kepler 3He in variable DB white dwarfs? 267 D. Koester, B. Wolff, M.H. Montgomery and D.E. Winget Wavelength dependence of pulsation amplitudes in DBV 269 white dwarfs D. Koester, C. Weidner, J. Ising and R. Kotak
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