Progress in Stellar Spectral Line Formation Theory PDF
Preview Progress in Stellar Spectral Line Formation Theory
Progress in Stellar Spectral Line Formation Theory NATO ASI Series Advanced Science Institutes Series A series presenting the results of activities sponsored by the NATO Science Committee, which aims at the dissemination of advanced scientific and technological knowledge, with a view to strengthening links between scientific communities. The series is published by an international board of publishers in conjunction with the NATO Scientific Affairs Division A Life Sciences Plenum Publishing Corporation B Physics London and New York C Mathematical D. Reidel Publishing Company and Physical Sciences Dordrecht, Boston and Lancaster D Behavioural and Social Sciences Martinus Nijhoff Publishers E Engineering and The Hague, Boston and Lancaster Materials Sciences F Computer and Systems Sciences Springer-Verlag G Ecological Sciences Berlin, Heidelberg, New York and Tokyo Series C: Mathematical and Physical Sciences Vol. 152 Progress in Stellar Spectral Line Formation Theory edited by John E. Beckman Department of Physics, Queen Mary College, London, U.K. and Instituto de Astrofisica de Canarias, La Laguna, Tenerife, Spain and Lucio Crivellari Osservatorio Astronomico di Trieste, Trieste, Italy D. Reidel Publishing Company Dordrecht / Boston / Lancaster Published in cooperation with NATO Scientific Affairs Division Proceedings of the NATO Advanced Research Workshop on Progress in Stellar Spectral Line Formation Theory, Grignano-Miramare, Trieste, Italy September 4-7,1984 Library of Congress Cataloging in Publication Data NATO Advanced Research Workshop on Progress in Stellar Spectral Line Formation Theory (1984: Trieste, Italy) Progress in stellar spectral line formation theory. (NATO ASI series. Series C, Mathematical and physical sciences; vol. 152) "Proceedings of the NATO Advanced Research Workshop on Progress in Stellar Spectral Line Formation Theory, Grignano-Miramare, Trieste, Italy, September 4-7,1984"-T.p. verso. "Published in cooperation with NATO Scientific Affairs Division." I neludes index. 1. Stars-Spectra-Congresses. 2. Astronomical spectroscopy Congresses. 3. Spectral line formation-Congresses. 4. Radiative transfer Congresses. I. Beckman, J. E. II. Crivellari, Lucio, 1950- III. North Atlantic Treaty Organization, IV. Title. V. Series: NATO ASI series. Series C, Mathematical and physical sciences; vol. 152. QB871.N38 1984 523.8'7 85-2425 ISBN-13: 978-94-010-8870-1 e-ISBN-13: 978-94-009-5372-7 DOl: 10.1007/978-94-009-5372-7 Published by D. Reidel Publishing Company PO. Box 17, 3300 AA Dordrecht, Holland Sold and distributed in the U.S.A. and Canada by Kluwer Academic Publishers, 190 Old Derby Street, Hingham, MA 02043, U.S.A. In all other countries, sold and distributed by Kluwer Academic Publishers Group, PO. Box 322, 3300 AH Dordrecht, Holland D. Reidel Publishing Company is a member of the Kluwer Academic Publishers Group All Rights Reserved ©1985 by D. Reidel Publishing Company, Dordrecht, Holland. Softcover reprint of the hardcover 1st edition 1985 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 copyright owner. TABLE OF CONTENTS ix LIST OF PARTICIPANTS FOREWORD xiii I. fE~g~~~~Y_E~il~!El£~!l£~_EE££l~~~_l~_ll~~ f£E~~!l£~_!~~£EY' J.L. Linsky / Observed and computed stellar line profiles: the roles played by partial redistribution, geometrical extent and expansion. 1 I. Hubeny / General aspects of partial redistribution and its astrophysical importance. 27 J. Oxenius / Kinetic aspects of redistribution in spectral lines. 59 E. Simonneau / Non local effects on the re distribution of resonant scattered photons. 73 H. Frisch / Asymptotic properties of complete and partial frequency redistribution. 87 R. Freire Ferrero / Some comments upon the line emission profile o/v. 101 I. Hubeny / A modified Rybicki method with partial redistribution. 109 r. ;-leinzel / Redistribution functions: a review of computational methods. 115 vi TABLE OF CONTENTS R. Freire Ferrero and P. Gouttebroze / The effect of abundance values on partial redistribution line computations. 125 P. Heinzel and I. Hubeny / Partial redistri bution interlocking in the solar chromos phere. 137 Pannel discussion on partial redistribution. 143 II. Methods in line radiative transfer. W. Kalkofen / Numerical methods in radiative transfer. 153 W. Kalkofen / Partial versus complete linearization. 169 A. Skumanich and B.W. Lites / Radiative transfer diagnostics: understanding multi-level transfer calculations. 175 G.B. Scharmer and M. Carlsson / A new method for solving multi-level non-LTE problems. 189 G.B. Rybicki / Escape probability methods. 199 R. Wehrse / Numerically stable discrete ordinate solutions of the radiative transfer equation. 207 o A. Nordlund / NLTE spectral line formation in a three-dimensional atmosphere with velocity fields. 215 L.S. Anderson / A code for line blanketing without local thermodynamic equilibrium. 225 Pannel discussion on radiative transfer methods. 233 TABLE OF CONTENTS vii III. Observational and theoretical as£ects of -------------------------------- ------- ~£~~!~~!_!l~~_f2~~~!l2~_l~_~~!~2£~y~l~~! ~~~_l~Q2~~!2~Y_~~~~~2~~~~!~· a) Laboratory environment. P. Jaegle, G. Jamelot and A. Carillon / Line formation in laboratory plasmas. 239 b) Stellar environment. M. Hack / Observational problems in spectral line formation. 265 D.C. Abbott / Current problems of line formation in early-type stars. 279 M.S. Giampapa / Stellar surface inhomo geneities and the interpretation of stellar spectra. 305 P.B. Kunasz / The theory of line transfer in expanding atmospheres. 319 W.-R. Hamann / Computed Hell spectra for Wolf-Rayet stars. 335 K. Hempe / Partial redistribution in the wind of red giants. 343 S.A. Drake / Modeling lines formed in the expanding chromospheres of red giants. 351 P. Gouttebroze, J.-C. Vial and G. Tsiropoula Transfer of Lyman-a radiation in solar coronal loops. 359 I. Vi n c e, M. S. D 00• ';] j +-r io• e v i. (; and V. Krsljanin / Pressure broadenillg and solar limb effect. 373 G. Mathys / Hydrogen line formation in dense plasmas in the presence of a magnetic field. 381 viii TABLE OF CONTENTS c) Non-stellar environment. J.E. Beckman / A review of line formation in molecular clouds. 389 APPENDIX. List of computer codes available at present. 407 INDEX OF SUBJECTS. 413 LIST OF PARTICIPANTS ABBOTT, D.C., JILA, University of Colorado, USA ANDERSON, L., Ritter Observatory, University of Toledo, USA ARRIBAS, S., Instituto de Astrofisica de Canarias, Spain AYDIN, C., Astronomi Institusu, Turkey BARYLKO, M., Inst. of Theoretical Physics and Astrophysics, Poland BECKMAN, J.E., Queen Mary College, University of London, UK BRUCA, L., International School for Advanced Studies, Miramare, Italy CARLSSON, M., Institute of Theoretical Astrophysics, Oslo, Norway CASTELLI, F., Osservatorio Astronomico di Trieste, Italy CATALA, C., DESPA, Observatoire de Paris-Meudon, France CATALANO, S., Istituto di Astronomia, Univ. di Catania, Italy CRIVELLARI, L., Osservatorio Astronomico di Trieste, Italy DENIZMAN, L., International School for Advanced Studies, Miramare, Italy DRAKE, S.A., JILA, University of Colorado, USA FAUROBERT, M., Observatoire de Nice, France FARAGGIANA, R., Osservatorio Astronomico di Trieste, Italy FREIRE FERRERO, R., Observatoire de Strasbourg, France FRISCH, H., Observatoire de Nice, France GIAMPAPA, M., NOAO -NSO, Tucson, USA GOUTTEBROZE, P., LPSP, Verrieres-Le-Buisqon, France HACK, M., Osservatorio Astronomico di Trieste, Italy HAMANN, W.-R., Institute fur Theoretische Physik und Sternwarte der Universitat, Kiel, FRG HEMPE, K., Hamburg Sternwarte, FRG HUSFELD, D., Institut fUr Astron. undAstrophysik derUniversitat, Mtmchen, FRG JAEGLE, P., Laboratoire de Spectrosccpie Atomique at Ionique, Orsay, France JAMELOT, G., Laboratoire de Spectroscopie Atomique at Ionique, Orsay, France KALKOFEN, W., Center for Astrophysics, Cambridge MA, USA KRSLJANIN, V., Astronomical Observatory Belgrade, Yugoslavia KUNASZ, P.B., University of Colorado, USA LINSKY, J.L., JILA, University of Colorado, USA LITES, B., HAO/NCAR, Boulder CO, USA MALAGNINI, M.-L., Osservatorio Astronomico di Trieste, Italy ix x LIST OF PARTICIPANTS • MATHYS, G., Institut fur Astronomie ETH-Zentrum, Switzerland MOLARO, P., International School for Advanced Studies, Miramare, Italy MOROSSI, C., Osservatorio Astronomico di Trieste, Italy NORDLUND, A., Astronomical Observatory, Copenhagen, Denmark OXENIUS, J., Univ. Libre de Bruxelles, Belgium PRADERIE, F., DESPA, Observatoire de Paris-Meudon, France RAMELLA, M., Osservatorio Astronomico di Trieste, Italy RYBICKI, G. Center for Astrophysics, Cambridge MA, USA SCHARMER, G., Stockholm Observatory, Sweden SCHMIDT, M., Institut flir Theoretische Astrophysik der Universitat, Heidelberg, FRG SELVELLI, P.L., Osservatorio Astronomico di Trieste, Italy SEVERINO, G., Osservatorio Astronomico di Capodimonte, Italy SIKORSKI, J., Inst. of Theoretical Phys. and Astrophys., Univ. of Gdansk, Poland SIMONNEAU, E., Institute d'Astrophysique, Paris, France TALAVERA, A., ESA IUE Obs., VILSPA, Spain VINCE, I., Astronomical Observatory Belgrade, Yugoslavia VLADILO, G., Osservatorio Astronomico di Trieste, Italy WEHRSE, R., Institut f~r Theoretische Astrophysik der Universit~t, Heidelberg, FRG Scientific Committee. J.E. Beckman (Director) L. Crivellari M. Hack (President) F. Praderie E. Simonneau Local Organizing Committee. L. Bruca, L. Crivellari, P. Molaro, G. Vladilo.
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