Progress in Stellar Spectral Line Formation Theory

451 Pages·1985·18.458 MB·English

by  Jeffrey L. Linsky (auth.), John E. Beckman, Lucio Crivellari (eds.)

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.