Molecules In The Stellar Environment: Proceedings Of Iau Colloquium No. 146 Held At Copenhagen, Denmark, May 24-29, 1993 (lecture Notes In Physics)

This volume gives and excellent survey of our present knowledge of molecular processes in stellar and proto-stellar objects. It reviews molecular physics in stellar environments and is intended to bridge the gap between astrophysicists and chemists. The topics range from the theoretical to the computational and include observational data. Among the topics treated are questions of stellar evolution, the determination of physical properties and structures , and the chemical composition of stellar protospheres. Opacity is studied in the context of various types of stellar and proto-stellar objects. This Volume Gives And Excellent Survey Of Our Present Knowledge Of Molecularprocesses In Stellar And Proto-stellar Objects. It Reviews Molecular Physicsin Stellar Environments And Is Intended To Bridge The Gap Between Astrophysicists And Chemists. The Topics Range From The Theoretical To The Computational And Include Observational Data. Among The Topics Treated Are Questions Of Stellar Evolution, The Determination Of Physical Propertiesand Structures , And The Chemical Composition Of Stellar Protospheres. Opacity Is Studied In The Context Of Various Types Of Stellar And Proto-stellar Objects. Stellar Photospheres And Molecules -- A View From The Bridge / David L. Lambert -- Dominating Molecules In The Photosphere Of Cool Stars / Uffe Grae Jorgensen -- Opacity Problems In Cool Low Mass Stars / Michael Scholz And Rainer Wehrse -- Molecular Opacities In Cool Dwarf Stars / James Liebert -- White Dwarfs / Peter Thejll -- Astrophysical Applications Of Approximate Methods For Molecular Opacities -- From Stars To Substellar Brown Dwarfs / Takashi Tsuji -- Infrared Spectroscopy And Molecules In Circumstellar Envelopes / Kenneth H. Hinkle -- Molecular Abundances In The Envelopes Around Evolved Stars / Hans Olofsson -- Polyynes And Polycyclic Aromatic Molecules In C-rich Circumstellar Envelopes / Alain Omont -- Improvements In The Computation Of Grain Opacity / David R. Alexander And Jason W. Ferguson -- From Molecules To Grains / Erwin Sedlmayr -- Opacity Problems In Protostellar Objects / Harold W. Yorke And Thomas Henning. Molecules In The Sun And Molecular Data / Nicolas Grevesse And A. Jacques Sauval -- Pressure-induced Molecular Absorption In Stellar Atmospheres / Aleksandra Borysow -- Continuous Molecular Opacities And Photodissociation / Ewine F. Van Dishoeck -- Effects Of Non-local Thermodynamic Equilibrium (nlte) On Molecular Opacities / Hollis R. Johnson -- Dissociation Energies And Partition Functions Of Small Molecules / Michel Costes And Christian Naulin -- Atomic Opacities / M.j. Seaton -- Computation Of The Absorption Coefficient For Diatomic Molecules / Mats Larsson -- Computation Of Opacities For Diatomic Molecules / Robert L. Kurucz -- Computation Of Frequencies And Linestrengths For Triatomic Molecules Of Astronomical Interest / Steven Miller, Jonathan Tennyson, Hugh R.a. Jones And Andrew J. Longmore -- Computational Approaches To Determining Accurate Band Strengths / Stephen R. Langhoff And Charles W. Bauschlicher, Jr. Ab Initio Calculations Of Absorption Coefficients Of Small Carbon Hydride Molecules / S.d. Peyerimhoff -- The Rasscf, Rassi, And Caspt2 Methods Used On Small Molecules Of Astrophysical Interest / Per-ake Malmqvist -- The Morbid Method / Per Jensen -- Experimental Measurement Of Weak Band Intensities / Kevin K. Lehmann And Daniele Romanini -- Oscillator Strengths And Excited State Lifetimes In Metallic Hydrides And Oxides / Joel Schamps -- The Berkeley Program On Molecules Of Astrophysical Interest / Sumner P. Davis -- Production, Detection And Study In The Infrared Of Unstable Molecules And Radicals / Mireille Morillon-chapey -- Laboratory Millimeter Wave Spectroscopy Of Small Reactive Species / C. Demuynck, M. Bogey, H. Bolvin, M. Cordonnier, J.l. Destombes And A. Walters -- Table Of Contents For Poster Session Proceedings Of Iau Colloquium 146: Molecular Opacities In The Stellar Environment / Edited By P. Thejll And U.g. Jorgensen. U.g. Jørgensen (ed.). Includes Bibliographical References And Index. Stellar photospheres and molecules — A view from the bridge....Pages 1-28 Dominating molecules in the photospheres of cool stars....Pages 29-48 Opacity problems in cool low mass stars....Pages 49-60 Molecular opacities in cool dwarf stars....Pages 61-70 White dwarfs....Pages 71-78 Astrophysical applications of approximate methods for molecular opacities — from stars to substellar brown dwarfs....Pages 79-97 Infrared spectroscopy and molecules in circumstellar envelopes....Pages 98-112 Molecular abundances in the envelopes around evolved stars....Pages 113-133 Polvynes and polycyclic aromatic molecules in c-rich circumstellar envelopes....Pages 134-148 Improvements in the computation of grain opacity....Pages 149-162 From molecules to grains....Pages 163-185 Opacity problems in protostellar objects....Pages 186-195 Molecules in the sun and molecular data....Pages 196-208 Pressure-induced molecular absorption in stellar atmospheres....Pages 209-222 Continuous molecular opacities and photodissociation....Pages 223-233 Effects of non-local thermodynamic equilibrium (NLTE) on molecular opacities....Pages 234-249 Dissociation energies and partition functions of small molecules....Pages 250-264 Atomic opacities....Pages 265-270 Computation of the absorption coefficient for diatomic molecules....Pages 271-281 Computation of opacities for diatomic molecules....Pages 282-295 Computation of frequencies and linestrengths for triatomic molecules of astronomical interest....Pages 296-309 Computational approaches to determining accurate band strengths....Pages 310-325 Ab initio calculations of absorption coefficients of small carbon hydride molecules....Pages 326-337 The RASSCF, RASSI, and CASPT2 methods used on small molecules of astrophysical interest....Pages 338-352 The MORBID method....Pages 353-365 Experimental measurement of weak band intensities....Pages 366-375 Oscillator strengths and excited state lifetimes in metallic hydrides and oxides....Pages 376-396 The berkeley program on molecules of astrophysical interest....Pages 397-411 Production, detection and study in the infrared of unstable molecules and radicals....Pages 412-416 Laboratory millimeter wave spectroscopy of small reactive species....Pages 417-431 Table of contents for “Poster session proceedings of IAU Colloquium 146: Molecular opacities in the stellar environment”....Pages 432-433 Provides a survey of the recent research knowledge of molecular processes in stellar and proto-stellar objects. Among the topics discussed are the determination of physical properties and structures, the question of stellar evolution and the chemical composition of stellar protospheres.