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Post-AGB Objects as a Phase of Stellar Evolution : Astrophysics and Space Science Library - R. Szczerba

Post-AGB Objects as a Phase of Stellar Evolution

Astrophysics and Space Science Library

Hardcover

Published: 31st August 2001
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The term proto-planetary nebulae (PPNe), in the context of the late stages of stellar evolution, was created at the end of the 1980s to express the belief that in the near future these objects will become planetary nebulae (PNe). The first proto-planetary nebulae (also called post-Asymptotic Giant Branch or post-AGB objects) were discovered in the mid-1970s in the course of the Air Force Sky Survey. Investigation of this phase of stellar evolution developed very rapidly in the 1980s after the IRAS mission when it became clear that proto-planetary nebulae emit a significant part of their energy in the mid- and far-infrared. A new impetus in this field began in the 1990s with high spatial resolution imaging in mid-infrared and optical wavelengths. Evidence has been found that proto-planetary nebulae (at least their central parts) are quite asymmetric while shells of AGB stars display spherical shapes. The most intriguing challenge now is to understand which physical processes are dominant during formation and evolution of proto-planetary nebulae. Is it magnetic field, evolution in binary systems, planets, axisymmetric superwind mass loss and its further shaping by fast wind, collimated jets interacting with a spherically symmetric AGB remnant or maybe an interplay between these different processes? Another challenge is to explain why the mass loss process near the end of the AGB evolution is modulated on timescales of a few hundred years. The model presented during this workshop seems to be very promising in this respect.

Preface
Acknowledgements
Organizing Committees
List of Participants
Conference Photo
Proto-planetary Nebulae as a Phase of Stellar Evolutionp. 3
Observational Database and Statistical Properties of Proto-planetary Nebulaep. 13
Optical Survey of Post-AGB Candidatesp. 21
Hot Post-AGB Starsp. 29
Properties of Post-AGB Stars with IRAS Colors Typical of Planetary Nebulaep. 41
BVRIJHK Photometry of Post-AGB Candidates: Evolution of Post-AGB Central Starsp. 45
Near IR Observations of the Arecibo Sample of OH/IR Starsp. 49
HST Imaging of Proto-planetary Nebulae and Very Young Planetary Nebulae - Towards a New Understanding of Their Formationp. 53
Morphological Properties of PPNs: Mid-IR and HST Imaging Surveysp. 65
MSX Sources in the LMC: Dust-enshrouded AGB Stars and Post-AGB Starsp. 71
Post-AGB Stars in Globular Clusters and Galactic Halosp. 77
The Evolution of AGB Stars Towards Planetary Nebulaep. 85
Mass Loss Characteristics of Dust Forming Long-Period Variable Starsp. 93
Pulsations in Proto-Planetary Nebulae as seen From Light Curve Studiesp. 101
Atmospheric Dynamics of Post-AGB Stars: New Results on the Nature of the Pulsation of HD 56126p. 105
Light Variability of Color Selected IRAS Sources: Variables in Late AGB and Early Post-AGB Phasep. 111
Circumstellar Arcs in AGB and Post-AGB Starsp. 115
Simulations of Quasi-Periodic Shells in Dust Forming AGB Windsp. 121
Polarimetry and Direct Imaging of Detached Shells Around Carbon Starsp. 127
Evolution of Thin Gas Shells Along the AGB and Beyondp. 131
Modelling of the Observed Post-AGB Evolutionp. 139
The Effect of the Transition Times in the Formation of Planetary Nebulaep. 147
Are Microstructures in the Outer Shells of PNe Fossil Condensations of the AGB Wind?p. 153
The Infrared [WC] Starsp. 157
Analysis of 5 PN with [WC 8-11] Nucleip. 163
Masses of Central Stars of Planetary Nebulaep. 167
AGB Evolution in Binary Systemsp. 173
Planets and Axisymmetric Mass Lossp. 181
Bipolar Outflows from OH/IR Starsp. 189
The Shape and Shaping of Proto-Planetary Nebulaep. 197
SPH Models of Proto-Planetary Nebulaep. 205
Dynamics of the Collimated Outflows of the PPN Hen 3-1475p. 209
Strong Asymmetries in the Neutral Envelope of Mirap. 215
Mass Loss Geometry in Symbiotic Binariesp. 221
Circumstellar Environment of RX Puppisp. 227
The Sudden Loss of 0.01 M[actual symbol not reproducible] from the VV Cep's Primary as a Characteristic of AGB Evolution in the Binariesp. 235
AGB and Post-AGB Evolution: Structural and Chemical Changesp. 241
Stellar Evolution and Nucleosynthesis of Post-AGB Starsp. 249
What Can we Learn from Post-AGB Chemical Studies on the AGB 3rd Dredge-Up Phenomena?p. 257
Optical Spectroscopy of Peculiar Supergiantsp. 265
Spectroscopical Masses of Post-AGB Starsp. 271
BD+33[degree]2642: Abundance Patterns in the Central Star of a Halo PNp. 277
The Very Lithium Rich Post-AGB SB2 Binary HD 172481p. 283
CIT 6: the Early Phase of PPN?p. 289
Spectroscopy of Post-AGB A-Supergiant HD 101584 (IRAS 11385-5517)p. 295
Spectroscopy of Post-AGB Candidate HD 331319 (IRAS 19475+3119)p. 301
Spectroscopy of Post-AGB Candidate IRAS 10215-5916p. 305
Spectroscopy of HD 168625 (IRAS 18184-1623)p. 309
The Evolutionary Status of HD 179821p. 313
IRAS 01005+7910, a High Galactic Latitude Post-AGB Star?p. 317
ISO Results for Protoplanetary Nebulaep. 323
An Atlas of ISO SWS Spectra: The Transition from AGB Stars to PNep. 329
Big, Bumpy Dust Shells around Protoplanetary Nebulaep. 333
Spatial Distributions of Multiple Dust Components in the PPN/PN Dust Shellsp. 339
Structure and Properties of IRC+10216p. 343
Spatially Resolved Spectra of the Red Rectangle in the N-bandp. 351
Molecules in AGB (and Post-AGB) Circumstellar Envelopesp. 357
Molecular Gas Images of Proto-planetary Nebulaep. 369
H[subscript 2] Spectroscopy of Protoplanetary Nebulaep. 377
Molecular Hydrogen Around Post - AGB Starsp. 383
Morphology and Kinematics of the Egg Nebula: CO and H[subscript 2]p. 387
O-bearing Molecules in Carbon-rich Proto-planetary Objects: Study of CRL 618p. 397
Low-excitation Atomic Gas Around Evolved Stars: ISO Observations of C-rich Nebulaep. 403
Low-excitation Atomic Gas in PPNe: ISO Observations of FIR Line Emission in O-rich Objectsp. 409
Probing the Post-AGB Nature of HD 179821p. 413
Masers Diagnostics to Identify Stars Departing from the AGBp. 417
IRAS 18455+0448: The Birth and Death of OH/IR Starsp. 423
OH Maser Mapping of Post-AGB Starsp. 429
The Time Variation in the Water Vapor Bands in Oxygen-rich Mira Variablesp. 433
Further Detections of OH Masers in Carbon Stars with Silicate Featuresp. 439
Object Indexp. 443
Author Indexp. 447
Table of Contents provided by Blackwell. All Rights Reserved.

ISBN: 9780792371458
ISBN-10: 0792371453
Series: Astrophysics and Space Science Library
Audience: Professional
Format: Hardcover
Language: English
Number Of Pages: 448
Published: 31st August 2001
Publisher: Springer
Country of Publication: NL
Dimensions (cm): 23.5 x 15.5  x 2.54
Weight (kg): 1.85