Astrochemistry of Cosmic Phenomena: Proceedings of the 150th Symposium of the International Astronomical Union, Held at Campos Do Jordão, São Paulo, Brazil, August 5-9, 1991

Front Matter....Pages i-xxvi
Astrochemistry of Cosmic Phenomena: An Introduction....Pages 1-6
Chemical Reactions in Astrochemistry....Pages 7-12
Neutral-Neutral Reactions: A New CRESU Study....Pages 13-14
ISO and Laboratory Astrophysics....Pages 15-16
Electrostatic Fragmentation of Dust Particles in Laboratory....Pages 17-18
Astrochemistry Library with Artificial Intelligence for Quality Control....Pages 19-20
Contribution of Pahs to the Interstellar Extinction Curve....Pages 21-22
Cumulene Carbenes in Space and in the Laboratory....Pages 23-24
UV-Visible and Near IR Absorption Characteristics of Interstellar Pahs. I. C 10 H 8 + ....Pages 25-26
Infrared Spectroscopy of Interstellar and Solar System Ice Analogs: Measurement of Optical Constants....Pages 27-28
Formation of Organic Molecules by Formaldehyde Reactions in Astrophysical Ices at Very Low Temperatures....Pages 29-30
Computational Chemistry Approach to Space Chemistry....Pages 31-38
Metamorphism of Cosmic Dust: Diagnostic Infrared Signatures....Pages 39-40
Positronium in Astrophysical Condition....Pages 41-45
Astrophysical Problems Involving Carbon Re-appraised....Pages 47-54
Advancement of Photoionization and Photodissociation Rates Relevant to Astrochemistry....Pages 55-63
Grain Spectroscopy....Pages 65-72
Chemistry in the Early Universe....Pages 73-82
Primordial Molecular Hydrogen Production and the Formation of Population III Objects....Pages 83-84
Deuterium in the Diffuse Interstellar Medium....Pages 85-90
The D/H Ratio in Molecular Clouds....Pages 91-95
Deuterium in the Solar System....Pages 97-101
H 2 Emission from External Galaxies....Pages 103-107
Interstellar Polarization in the Small Magellanic Cloud....Pages 109-110
Molecular abundances in extragalactic sources....Pages 111-116
A 158μm [CII] Map of NGC 6946: Detection in Extragalactic Atomic and Ionized Gas....Pages 117-119
Molecule Formation in External Galaxies....Pages 121-126
Observations of Diffuse and Translucent Clouds....Pages 127-132
The Interstellar C-H Stretching Band Near 3.4 μm: Constraints on the Composition of Organic Material in the Diffuse ISM....Pages 133-134
Search for the 4430 Å DIB in the Spectrum of Coronene....Pages 135-136
Theoretical Modelling of the Infrared Fluorescence by Interstellar Polycyclic Aromatic Hydrocarbons....Pages 137-138
Are Carbon Clusters the Cause of Interstellar Diffuse Bands?....Pages 139-141
Diffuse, Translucent & High-Latitude Clouds: Theoretical Considerations....Pages 143-151
Abundance Of Ch + in Translucent Molecular Clouds: Problems for Shock Models?....Pages 153-154
Chemical Effects of Shear Alfvén Waves in Molecular Clouds....Pages 155-156
Interpretation of the level population distribution or highly rotationally excited H 2 molecules in diffuse clouds....Pages 157-158
The Structure of Quiescent Clouds....Pages 159-167
Abundance of DCO + in Nearby Molecular Clouds....Pages 169-170
Molecular Abundance Variations Among and Within Cold, Dark Molecular Clouds....Pages 171-177
Results from a Three Position Spectral Scan in the Sgr B2 Molecular Cloud Core....Pages 179-180
What Species Remain to be Seen?....Pages 181-186
Observations of HNO....Pages 187-188
On the Possible Detection of Solid O 2 in Interstellar Grains....Pages 189-190
Interstellar H 3 O + ....Pages 191-192
Carbon Isotopic Chemistry....Pages 193-197
Chemical Models of Active Regions....Pages 199-203
Evolutionary Models of Interstellar Chemistry....Pages 205-210
The Formation of Deuterated Molecules in Dense Clouds....Pages 211-215
Molecular Line Studies of Dense Core Motions....Pages 217-222
Molecular Abundances in the Sgr A Molecular Cloud....Pages 223-224
Molecular Line Observations towards W58 and GL490....Pages 225-226
Nitrogen Sulfide (NS) in Star Forming Regions....Pages 227-230
Radiation Transfer and Photochemical Effects in Inhomogeneous Dense Clouds....Pages 231-236
Observations of Shocked Regions....Pages 237-244
H 2 O Maser Pumping by Shock Waves....Pages 245-247
The C:O ratio in dark clouds with cyclic star formation....Pages 249-250
Hot cores and cold grains....Pages 251-258
The Environment of High-Mass Young Stellar Objects....Pages 259-264
Infrared Molecular Spectroscopy of Orion....Pages 265-269
Chemical Gradients in the Orion Molecular Cloud....Pages 271-274
The Polarized Water Maser in Orion....Pages 275-276
OH Masers in Outflow Regions....Pages 277-280
Abundances of Refractory Elements in the Orion Nebula....Pages 281-283
Panel Discussion: The Co/H 2 Abundance Ratio....Pages 285-295
Observations of Atomic Gas in Photodissociation Regions....Pages 297-302
Observations of CII, CI And CO in Interface Regions....Pages 303-308
CH + in Shocks, Cloud-Intercloud Interfaces, and Dense Photodissociation Regions....Pages 309-310
Warm Molecular Clouds....Pages 311-315
Hot Core Chemistry: Gas Phase Molecule Formation in Situ .....Pages 317-318
The Physical and Chemical Structure of Warm, Dense Regions: IC 63 and IC 443....Pages 319-320
Preliminary Observations of the Galaxy with a 7° Beam by the Cosmic Background Explorer (COBE)....Pages 321-326
Chemical Composition Variations in the Galaxy....Pages 327-328
The Chemistry of Photon-Dominated Regions....Pages 329-332
Near Infrared Emission of Neutral Carbon from Photon-Dominated Regions....Pages 333-334
Observations of Water and Molecular Oxygen in the Interstellar Gas....Pages 335-340
Methanol Masers in W3(OH)....Pages 341-344
VLBI Observations of Ammonia (9,6) Masers....Pages 345-346
A Model for the Maser Source NGC 7538 IRS 1....Pages 347-348
Results of the Monitoring of a Very Strong Water Maser Event in W49N....Pages 349-350
H Atom Observations in Near-Stellar Environments....Pages 351-355
Infall in Collapsing Protostars....Pages 357-358
Carbon to Helium Ratio in the Wind of Central Stars of Planetary Nebulae with WC Spectrum....Pages 359-360
Chemical Composition of a Southern Planetary Nebulae Sample....Pages 361-362
Chemistry in Protoplanetary Nebulae....Pages 363-364
Molecules in Novae and Supernovae....Pages 365-370
Silicon Monoxide in Supernova SN1987A....Pages 371-372
Molecular Studies of Herbig-Haro Objects....Pages 373-378
Molecules in Stellar Winds....Pages 379-386
Excited Hydrogen Chemistry in Protostellar Outflows....Pages 387-388
Molecules in the Envelopes of Late-Type Stars....Pages 389-394
Lithium Abundance and Spacial Distribution of T Tauri Stars....Pages 395-397
Sub-Millimetre Observations of SiCC in IRC 10216....Pages 399-400
A Molecular Line Survey of the Carbon Star IRAS 15194–5115....Pages 401-402
Carbon Stars with Oxygen-Rich Circumstellar Envelopes....Pages 403-404
G305.8 – 0.2: A Young Object with a Dust And Gas Envelope....Pages 405-406
Bipolar Outflow and Turbulence in Molecular Clouds Due to Protostellar Alfvén Waves....Pages 407-408
Spectral Synthesis of Cool Components of Symbiotic Stars....Pages 409-410
Radioactive Isotope 26 Al in the Interstellar Matter (resulting from a mass loss by AGB Stars)....Pages 411-412
Are Molecules Responsible for Origin of Cold Giants Mass Loss?....Pages 413-414
Cometary Chemistry....Pages 415-420
Cometary Origin of Carbon and Water on the Terrestrial Planets....Pages 421-422
Interstellar and Meteoritic Organic Matter At 3.4 μm....Pages 423-424
Diamagnetic Abundance Differentiation in the Solar System....Pages 425-426
Cometary Molecules....Pages 427-434
Laboratory Studies of Planetary Molecules and Ices: The Case of IO....Pages 435-436
Type II Clathrate Hydrate Formation in Cometary Ice Analogs In Vacuo....Pages 437-438
Observations of Parent Molecules in Comets at Radio Wavelengths: HCN, H 2 S, H 2 CO and Ch 3 OH....Pages 439-440
Radio Interferometric Observations of Cometary Molecules....Pages 441-442
Gas Production Rates in Comets....Pages 443-445
Mass Loss Rates of Three Comets....Pages 447-448
A Model of P/Tempel 2 With Dust and Detailed Chemistry....Pages 449-450
Solar System - Interstellar Medium....Pages 451-458
Formation of Comets: Constraints from the Abundance of Hydrogen Sulfide and other Sulfur Species....Pages 459-460
A Diagnostic Spectral Indicator of the Exposure Age of an Asteroidal Surface....Pages 461-462
Summary....Pages 463-469
The Cosmic-Ray Ionization Rate....Pages 471-475
Dense Knots in High Latitude Molecular Clouds....Pages 477-482
Back Matter....Pages 483-509