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For further information please contact Springer-Verlag, Physics Editorial Department II, Tiergartenstrasse 17, D-69121 Heidelberg, Germany .aA Sandqvist E .O Lindblad ).sdE( Barred Galaxies and Circumnuclear Activity Proceedings of the LEBON MUISOPMYS 89 Held at Stockholm Observatory, Saltsj6baden, ,nedewS 03 November - 3 December 5991 ~ Springer Editors Aage Sandqvist Per Olof Lindblad Stockholm Observatory Sq3336 Saltsj6baden, Sweden Cataloging-in-Publication Data applied for. Die Deutsche Bibliothek - CIP-Einheitsaufnahme Barred galaxies and circumnuclear activity : proceedings of the Nobel Symposium 98, held at Stockholm Obeservatory, Saltsj/3baden, Sweden, 30 November - 3 December 1995 / Nobel Symposium 98. Aage Sandqvist ; Per Olof Lindblad (ed.). - Berlin ; Heidelberg ; New York ; Barcelona ; Budapest ; Hong Kong ; London ; Milan ; Paris ; Santa Clara ; Singapore ; Tokyo : Springer, 1996 (Lecture notes in physics ; Vol. 474) ISBN 3-540-61571-7 NE: Sandqvist, Aage Hrsg.; Nobel Symposium <98, 1995, Saltsj6baden> ; GT ISSN 0075-8450 ISBN 3-540-61571-7 Springer-Verlag Berlin Heidelberg New York This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, re-use of illustra- tions, recitation, broadcasting, reproduction on microfilms or in any other way, and storage in data banks. 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Typesetting: Camera-ready by the authors/editors Cover design: ngised noitcudorp& GmbH, Heidelberg SPIN: 10520109 55/3142-543210 - Printed on acid-free paper Preface The year 1995 marked the centenary of two events: (i) 26 November, 1895 is the date of birth of Bertil Lindblad, and (ii) 27 November, 1895 is the date on which Alfred Nobel signed his testament that led to the Nobel Prizes. In order to celebrate these events a Nobel Symposium (No. 98) was held from 30 November to 3 December, 1995 in SaltsjSbaden, Sweden, near Stockholm Observatory where Bertil Lindblad was active as Director during most of his scientific life. The topic of the Nobel Symposium, namely "Barred Galaxies and Circumnuclear Activity", was attuned to the activities of the research group at Stockholm Observatory, led by Per Olof Lindblad who had recently retired. With the successful refurbishing of the Hubble Space Telescope, the completion of the Keck Telescope and the Very Long Baseline Array, and the imminent construction of the Very Large Telescope, the time was considered ripe for bringing together the leading authorities on the observational, numerical, and theoretical aspects of the bars in barred galaxies and their interactions with the circumnuclear regions near the cores of these often active galaxies. The Nobel Symposium was sponsored by the Nobel Foundation through its Nobel Symposium Fund. The invitations to attend were limited to about 30 scientists (by the symposium statutes of the Nobel Foundation). These included a son and two grandsons of Bertil Lindblad. There was an additional audience of about 40 other interested scien- tists and advanced students. The Scientific Organizing Committee consisted of Francoise Combes, Robert A.E. Fosbury, Steven JSrs~ter, Per Olof Lindblad, and Aage Sandqvist, the latter three of whom also served as the Local Organizing Committee. The Symposium was officially opened by Michael Sohlman, the Executive Director of the Nobel Foundation. After the opening, Alar Toomre gave some historical remarks on Bertil Lindblad's work on galactic dynamics. The symposium then got down to business and the papers are presented in these proceedings in the order in which they were given. Two of the invited participants were unfortunately unable to attend the symposium, but one had already prepared the manuscript and we are happy to include it in this volume. The symposium banquet was held at the Stockholm Observatory, following aperitifs at the Observatory residence of Gunilla and Per Olof Lindblad (also formerly the residence of Bertil Lindblad). At this social event, George Contopoulos and Donald Lynden-Bell reminisced about their interactions with Bertil Lindblad. The following evening included a Stockholm Opera performance of Guiseppi Verdi's Requiem (which was given extra significance by being dedicated to the victims of the "Estonia") and a subsequent supper in the cellars of the eighteenth-century Old Stockholm Observatory. As always, a symposium means a large amount of work for many people, and we should like to thank all of them. We especially wish to express our gratitude to Anne- Marie Tannenberg for functioning as secretary and hostess of this Nobel Symposium. Sah, sj6baden, 31 May 1996 Aage Sandqvist Contents Some Historical Remarks on Bertil Lindblad's Work on Galactic Dynamics A. Toomre ...................................................... Formation and Evolution Mechanisms of Barred Spiral Galaxies D. Lynden-Bell .................................................. Orbits in Barred Galaxies G. Contopoulos, N. Voglis and C. Efthymiopoulos ............... 91 Secular Evolution in Barred Galaxies J.A. Sellwood and V.P. Debattista ............................... 43 The Fate of Barred Galaxies in Interacting and Merging Systems E. Athanassoula .................................................. 59 H I in Barred Spirals A. Bosma ........................................................ 67 H I Observations of a Sample of Barred Spirals H. Kristen ....................................................... 75 Hydrodynamical Simulations of the Barred Spiral Galaxy NGC 1365 P.A.B. Lindblad, P.O. Lindblad and E. Athanassoula ............. 83 Evolution of Galaxies Along the Hubble Sequence D. Pfenniger ..................................................... 19 Rings, Lenses, Nuclear Bars: The ~ndamental Role of Gas F. Combes ....................................................... 101 The Barred Galaxy NGC 1530 P. Teuben, M. Regan and S. Vogel ............................... 521 A Circumnuclear Molecular Torus in NGC 1365 Aa. Sandqvist .................................................... 331 Dynamics of Inner Galactic Disks: The Striking Case of M 100 I. Shlosman ...................................................... 141 IIIV Dynamical Substructures in Two Nearby Galaxy Nuclei R. Bacon and E. Emsellem ....................................... 151 The Spheroidal Component of Seyfert Galaxies C.H. Nelson, M. Whittle and J.W. MacKenty ................... 157 The Pattern Speed of the Galactic Bulge A.J. Kalnajs ..................................................... 165 The Central Parsec of the Milky Way: Star Formation and Central Dark Mass R. Genzel ........................................................ 175 Radio Continuum and Molecular Gas in the Galactic Center Y. Sofue ......................................................... 581 The Galactic Center Dynamics A.M. Fridman, O.V. Khoruzhii, V.V. Lyakhovich, L. Ozernoy and L. Blitz ...................................................... 193 Observational Evidence for the AGN Paradigm A.S. Wilson ...................................................... 102 Bar Triggered Nuclear Activity and the Anisotropic Radiation Fields of Active Galactic Nuclei D.3. Axon and A. Robinson ...................................... 322 Circumnuclear Starbursts in Barred Galaxies J.H. Knapen ..................................................... 233 Circumnuclear Activity R.A.E. Fosbury .................................................. 241 Outflows from the Nearest Barred Galaxies T.M. Heckman ................................................... 263 The Nuclear High Excitation Outflow Cone in NGC 1365 P.O. Lindblad, M. Hjelm, S. JSrs~iter and H. Kristen ............ 283 Hubble Space Telescope Observations of the Centers of Elliptical Galaxies H. Ford, L. Ferrarese, G. Hartig, W. Jaffe, Z. Tsvetanov and F. van den Bosch ............................................ 293 List of Participants Athanassoula, Evangelie lia(cid:14)9 r fr Observatoire de Marseille, 2 Place Le Verrier, 13248 Marseille Cedex 04, France Axon, David axon@stsc(cid:127) edu Astrophysics Division of ESA, Space Telescope Science Institute, 3700 San Martin Drive, Baltimore MD 21218, USA Bacon, Roland bacon~orion, univ-lyonl, fr Centre de Recherche Astronomique de Lyon, Observatoire de Lyon, F-69561 St Genis-Laval cedex, France Blitz, Leo blitz@astro, umd. edu Astronomy Department, University of Maryland, College Park MD 20742, USA Bosma, Albert bosma(cid:14)9 cnrs-ntrs, fr Observatoire de Marseille, 2 Place Le Verrier, F-13248 Marseille Cedex 4, France Combes, Francoise bott aroC~es ioa. obspm, fr DEMIRM, Observatoire de Paris, 16 Av. de l'Observatoire, F-75014 Paris, France Contopoulos, George gcontop@atlas, uoa. ariadne-t, gr Department of Astronomy, University of Athens, ,silopoimitsipenaP GR-157 84 Athens, Greece Ford, Holland ford~jhufos, pha. jhu. edu Department of Physics and Astronomy, Johns Hopkins ,ytisrevinU 3701 San Martin Drive, Baltimore MD 21218, USA Fosbury, Robert rfosbury~eso, org Space Telescope - European Coordinating ,ytilicaF D-85748 Garching ieb Miinchen, Germany Fridman, Alexei afridlaan@inasan, rssi. ru Institute of Astronomy, Russian Academy of Sciences, 48 Pyatnitskaya St., Moscow 109017, Russia Genzel, Reinhard genzel~mpe-gaxching, mpg. de MPI ffir Extraterrestrische Physik, Giessenbachstrasse, D-85748 Garching, Germany Heckman, Timothy heckman@rowland, pha. jhu. edu Department of Physics and Astronomy, The Johns Hopkins University, Bal- timore DM 21218, ASU JSrs~ter, Steven steven@astro, su. se Stockholm Observatory, S-133 63 SaltsjSbaden, Sweden Kalnajs, Agris agrisCmerlin, anu. edu. all Mount Stromlo and Siding Spring Observatories, Private Bag, Weston Creek PO, 2611, Australia Knapen, Johan [email protected] .ac.u.k Departement de Physique, Universite de Montreal, C.P. 6128, Succursale Centre-Ville, Montreal PQ C3H 3J7, Canada Kristen, Helmuth helmuth@astro, su. se Stockholm Observatory, S-133 63 SaltsjSbaden, Sweden Lindblad, Per A.B. pabli@astro, su. se Stockholm Observatory, S-133 63 SaltsjSbaden, Sweden Lindblad, Per Olof po@astro, su. se Stockholm Observatory, S-133 63 SaltsjSbaden, Sweden Lynden-Bell, Donald asd@ast, cam. ac .uk Institute of Astronomy, The Observatories, Cambridge 2BC 0HA, UK Nelson, Charles cnelson@stsci, edu Space Telescope Science Institute, 3700 San Martin Drive, Baltimore DM ,81212 USA Pfenniger, Daniel pfennigeQscsun.unige, ch Geneva Observatory, University of Geneva, CH-1290 Sauverny, Switzerland Sandqvist, Aage sandqvis@astro, su. s@ Stockholm Observatory, S-133 63 SaltsjSbaden, Sweden Sellwood, Jerry sellwood~physics, rutgers, edu Rutgers University, Department of Physics and Astronomy, P.O. Box ,948 Piscataway NJ 08855, USA Shlosman, Isaac shlosman@asta, pa. uky. edu Department of Physics and Astronomy, University of Kentucky, Lexington KY ,5500-60504 USA Sofue, Yoshiaki sofueesof, mtk. ion. s. u-tokyo, ac. jp Institute of Astronomy, University of Tokyo, Mitaka, Tokyo 181, Japan Teuben, Peter teuben@astro .umd. edu Astronomy Department, University of Maryland, College Park DM ,24702 USA Toomre, Alar toomre~math, mit. edu Massachusetts Institute of Technology, Cambridge MA 02139, USA Tsvetanov, Zlatan zlatan~pha, jhu. edu Department of Astronomy and Physics, Center for Astrophysical Sciences, Johns Hopkins University, Baltimore DM 21218, ASU Wilson, Andrew [email protected], edu Astronomy Department, University of Maryland, College Park DM ,24702 USA .1 R. Genzel 2. R. Booth 3. L. Blitz 4. D. Lynden-Bell 5. H. Martinet 6. G. Contopoulos 7. S. J6rs~ter 8. R. Bacon 9. J. Knapen 10. I. Shlosman 11. D. Pfenniger 12. P.O. Lindblad 13. A. Toomre 14. H. Ford 15. H. Kristen 16. Z. Tsvetanov 17. P. Teuben 18. R. Fosbury .91 A. Wilson 20. A. Kalnajs 21. Y, Sofue 22. D. Axon 23. C, Nelson 24. E. Athanassoula 25. F. Combes 26. P.A.B. Lindblad 27. J. Sellwood 28. A. Bosma 29. Aa. Sandqvist