INTERNATIONAL ASTRONOMICAL UNION SYMPOSIUM No. 140 GALACTIC AND INTERGALACTIC MAGNETIC FIELDS Edited by R. BECK, P. P. KRONBERG and R. WIELEBINSKI 1lJ1A[I INTERNATIONAL ASTRONOMICAL U ION "0 KLUWER ACADEMIC PUBLISHERS Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.19, on 03 Oct 2021 at 10:25:05, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900191107 GALACTIC AND INTERGALACTIC MAGNETO FIELDS Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.19, on 03 Oct 2021 at 10:25:05, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900191107 INTERNATIONAL ASTRONOMICAL UNION UNION ASTRONOMIQUE INTERNATIONALE GALACTIC AND INTERGALACTIC MAGNETIC FIELDS PROCEEDINGS OF THE 140TH SYMPOSIUM OF THE INTERNATIONAL ASTRONOMICAL UNION HELD IN HEIDELBERG, F.R.G., JUNE 19-23,1989 EDITED BY R. BECK Max-Planck-Institut für Radioastronomie, Bonn, F.R.G. P. P. KRONBERG Department of Astronomy, University of Toronto, Canada and R. WIELEBINSKI Max-Planck-Institut für Radioastronomie, Bonn, F.R.G. KLUWER ACADEMIC PUBLISHERS DORDRECHT / BOSTON / LONDON Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.19, on 03 Oct 2021 at 10:25:05, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900191107 Library of Congress Cataloging in Publication Data International Astronomical Union. Symposium (104th : 1989 : Heidelberg, Germany) Galactic and interga1 actic magnetic fields : proceedings of the 140th Symposium of the International Astronomical Union held in Heidelberg, FRG, June 19-23, 1989 / edited by R. Beck, P.P. Kronberg, R. Wielebinski. ρ. cm. At head of title-. International Astronomical Union. ISBN 0-7923-0704-6 (a lk. paper). — ISBN 0-7923-0705-4 (pbk. : alk. paper) 1. Galaxies—Magnetic fields—Congresses. I. Beck, Rainer, 1951- . II. Kronberg, Peter. III. Wielebinski, R. IV. Title. QB857.5.M34I58 1989 523. 1 ' 12—dc20 90-4199 ISBN 0-7923-0704-6 (HB) ISBN 0-7923-0705-4 (PB) Published on behalf of the International Astronomical Union by Kluwer Academic Publishers, P.O. Box 17,3300 AA Dordrecht, The Netherlands. Kluwer Academic Publishers incorporates the publishing programmes of D. Reidel, Martinus Nijhojf, Dr W. Junk and MTP Press. Sold and distributed in the USA. and Canada by Kluwer Academic Publishers, 101 Philip Drive, Norwell, MA 02061, USA. In all other countries, sold and distributed by Kluwer Academic Publishers Group, P.O. Box 322,3300 AH Dordrecht, The Netherlands. Printed on acid-free paper All Rights Reserved © 1990 by the International Astronomical Union No part of the material protected by this copyright notice may be reproduced or utilized in any form or by any means, electronic or mechanical including photocopying, recording or by any information storage and retrieval system, without written permission from the publisher. Printed in The Netherlands Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.19, on 03 Oct 2021 at 10:25:05, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900191107 TABLE OP CONTENTS Magnetic Highlights ν Preface χίχ List of Participants xxi Conference Photo χχν 1. A Survey of Magnetic Phenomena near the Solar Photosphere, in the Corona, and in Stellar Winds The Magnetic Field of the Sun: An Object Lession E.N. Parker 1 The Dynamics of Solar Coronal Magnetic Fields B.C. Low 13 Solar Coronal Mass Ejections A.J. Hundhausen, D.G. Sime and B.C. Low 16 A Storage Process of the Magnetic Energy in the Space Active Regions and Stellar Atmosphere Li Zhongyuan 17 CoMStOC: The Coronal Magnetic Structures Observing Campaign J.T. Schmelz 20 Masers and Stellar Magnetic Fields M.J. Reid 21 Magnetized Langmuir Solitons Around Pulsars E. Asseo, G. Pelletier and H. Sol 26 Magnetic Field of Rotating Bodies A.Z. Dolginov 27 2. The Magnetic Field Structure of the Milky Way: The Meeting of Observation and Theory The Magnetic Field of the Milky Way V. Trimble 29 A Survey of Recent Magnetic Field Measurements in HI Features of the Galaxy C. Heiles 35 Pulsars as Probes of the Galactic Magnetic Field A.G. Lyne 41 Structure of the Local Galactic Magnetic Field R.J. Rand and S.R. Kulkarni 44 A Faraday Rotation Survey in the First Quadrant of the Galaxy A. CI egg and J. Cordes 47 Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.19, on 03 Oct 2021 at 10:25:05, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900191107 viii Parameters of the Magnetic Field in the Local Galactic Arm Derived from Low Frequency Absorption Measurements in the Ionized Gas E.A. Abramenkov and V.V. Krymkin 49 The Two Component Magnetic Field of the Galaxy R.R. Andreassian and A.N. Makarov 54 Fluctuations in the Galactic Magnetic Field J.M. Cordes, A. Clegg and J.H. Simonetti 55 Correlation Between Galactic Non-Thermal Continuum Emission and HI-Column Density K. Beuermann and Y.G. Kim 59 A Detailed Model of the Distribution of Synchrotron Emission in the Galactic Disk A. Broadbent, C.G.T. Haslam and J.L. Osborne 61 The Need for High Resolution for Polarization Studies of Galactic Background Radiation G.L. Verschuur and T.A.Th. Spoelstra 62 Extended Polarized Emission Structures in the Galactic Plane at 11 cm Wavelength N. Junkes, E. Fürst and W. Reich 63 The Magnetic Field of the Galaxy in the Solar Vicinity and the Polarization of Stars A.N. Makarov and R.R. Andreassian 65 3. Magnetic Fields in and around Supernova Remnants Polarization and Magnetic Fields in Supernova Remnants O.K. Milne 67 Probing the Interstellar Magnetic Field by Polarization Observations of Supernova Remnants E. Fürst and W. Reich 73 Radio Polarimetry of Tycho's SNR J.R. Dickel, W.J.M. van Breugel and R.G. Strom 76 The Magnetic Field of the Crab as Revealed by New, High Resolution, Multi-Band Radio Images M.F. Biet en hoi ζ and P.P. Kr on berg 79 Magnetic Fields in Young SNRs J.R. Dickel and E.M. Jones 8< 4. Magnetohydrodynamics of Galactic Magnetic Fields Dynamo in Astrophysics A.A. Ruzmaikin 83 Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.19, on 03 Oct 2021 at 10:25:05, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900191107 ix Large-Scale Galactic and Intergalactic Magnetic Fields M. Fujimoto and T. Saw a 90 Torus-Dynamo W. Deinzer, H. Grosser and D. Schmitt 95 Key Problems of Flat Objects Dynamo Theory and Ways of Their Solution F. Krause, R. Mein el, D. Elstner and G. Rüdiger 97 Mean-Field Models of Galactic Dynamos Admitting Axi- symmetric and Non-Axisymmetric Magnetic Field Structures K.-H. Rädler and E. Wiedemann 107 The Alpha-Effect in Galaxies is Highly Anisotropic G. Rüdiger 113 Galactic Dynamos Without Sharp Boundaries: Non-Axisymmetric Fields in Axisymmetric Disks? R. Meinel, D. Elstner, G. Rüdiger and F. Krause 115 Dynamo Generation of Galactic Magnetic Fields K.J. Donner 117 Galactic Dynamo Theory Confronted with Observations Yu.S. Krasheninnikova, D.D. Sokoloff, A.A. Ruzmaikin and A. Shukurov 119 Bisymmetric Spiral Magnetic Fields and Gravitational Instabilities of Galactic Disks T. Saw a and M. Fujimoto 125 Enhancement of Galactic Dynamos by Density Waves M. Tosa and M. Chiba 127 Swing Excitation of Galactic Magnetic Fields Induced by Spiral Density Waves M. Chiba and M. Tosa 131 3-D Models of Galaxy Magnetic Fields with Spiral Shocks J. Panesar and A.H. Nelson 133 Galactic Dynamos and Density Wave Theory L. Mes tel and Κ. Subramanian 135 Phenomena Involving Magnetic Vortex Tubes P.F. Browne 136 Magnetic Viscosity as the Dominant Shear Force in Accretion Disks W. Kundt 139 3-Dimensional Particle-in-Cell Simulations of Spiral Galaxies A.L. Peratt, W. Peter and C.M. Snell 143 Magnetohydrodynamic Simulation of the Evolution of Large-Scale Magnetic Fields in Disk Galaxies R.C. Bishop, P.R. Shapiro and D.C. Barnes 151 Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.19, on 03 Oct 2021 at 10:25:05, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900191107 χ On the Nature of Magnetohydrodynamic Turbulence in the Interstellar Medium V.N. Fedorenko 153 Regular and Stochastic Dynamics of Relativistic Particles in Alfvén Waves S.M. Carioli and V.N. Fedorenko 155 Magnetic Field in a Turbulent Galactic Disk K. Otmianowska-Mazur 157 The Propagation of Discontinuities in Gas Flows in the ISM and its Relation to the Galactic Synchrotron Radio Emission V.G. Berman, L.S. Marochnik, Yu.N. Mishurov and A.A. Suchkov 159 Turbulent Mixing in Circumstellar Space in the Presence of Magnetic Fields D. Breitschwerdt and F.D. Kahn 163 Diamagnetic Cavities in the Interstellar Medium G. Gisler 168 Spontaneous Discontinuities in Galactic Magnetic Fields and the Creation of Galactic X-ray Halos E.N. Parker 169 Interstellar Magnetohydrodynamic Waves as Revealed by Radio Astronomy S.R. Spangler 176 Galactic Winds and Magnetic Fields from Spiral Galaxies H.J. Volk, D. Breitschwerdt and J.F. McKenzie 111 Galactic Winds: The Role of Cosmic Rays G.P. Zank 182 Interaction of Cosmic Rays with a Galactic Corona Bow-Shock M.