Wolf-Rayet Stars: Observations, Physics, Evolution

Front Matter....Pages i-xix
Front Matter....Pages 1-1
Wolf-Rayet Phenomena....Pages 3-22
The Effective Temperatures of Early Wolf-Rayet Stars....Pages 23-26
The Galactic Distribution of Wolf-Rayet Stars....Pages 27-40
Line Strengths in WN Stars....Pages 41-45
Hot Mantles, Moderate Photospheres for Wolf-Rayet Stars....Pages 47-51
Corrections for Hydrostatic Atmospheric Models: Radii and Effective Temperatures of Wolf Rayet Stars....Pages 53-56
Preliminary Results of a New Study of the Intrinsic Properties of Wolf-Rayet Stars....Pages 57-61
Radio Observations of HD 193793....Pages 63-66
Near-Infrared Photometry of Southern Galactic Wolf-Rayet Stars....Pages 67-72
Infrared (1.4 – 4.1μm) Spectra of Wolf-Rayet Stars....Pages 73-78
The Infrared Recombination-Line Spectra of Wolf-Rayet Stars....Pages 79-83
Front Matter....Pages 85-85
The Chemical Composition of the Wolf-Rayet Stars....Pages 87-104
Chemical Composition of Wolf-Rayet Stars: Abundant Evidence for Anomalies....Pages 105-107
H/He Ratios for WN Stars in the LMC and the Galaxy....Pages 109-112
The C/N Ratio in WN and WC Stars....Pages 113-116
On the Chemical Abundances, Evolutionary Stage and Bolometric Magnitude of WR Stars....Pages 117-120
Absolute Spectrophotometry of Wolf-Rayet Stars: Are the Colors the Same?....Pages 121-125
An Explanation of the Radio Flux Mystery of HD 192163 and Empirical Models for WN Stars....Pages 127-130
Carbon Abundance in WC Stars....Pages 131-134
Synthetic Spectra for WN Stars....Pages 135-138
Front Matter....Pages 85-85
Carbon Abundance in the WC 11 Star CPD -56°8032....Pages 139-145
Front Matter....Pages 147-147
Observations of Mass Loss from OB and Wolf-Rayet Stars....Pages 149-172
Theories for the Winds from Wolf Rayet Stars....Pages 173-183
The Theory of Radiation Driven Stellar Winds and the Wolf-Rayet Phenomenon....Pages 185-196
The Influence of the Ratio of Total to Selective Extinction on the Determination of the Mass Loss Rate of Wolf Rayet Stars from Infrared Excess Measurements....Pages 197-201
On the Properties of Wolf-Rayet Stars and Their Mass Loss....Pages 203-207
A Hot Corona Model for O-Stars and WR Stars....Pages 209-213
Radio Continuum Measurements of Mass Loss from Wolf-Rayet Stars....Pages 215-220
Radio Emission from WR Stars....Pages 221-224
IR Spectroscopy of WN Stars....Pages 225-229
The Near Infrared Properties of Selected WN Stars in the Large Magellanic Cloud....Pages 231-235
Near Infrared Observations of Galactic WN Stars....Pages 237-241
Line Formation in Winds with Enhanced Equatorial Mass-Loss Rates and Its Application to the Wolf-Rayet Star HD 50896....Pages 243-247
Front Matter....Pages 249-249
Wolf-Rayet Stars with Massive Companions....Pages 251-262
Wolf-Rayet Stars with Compact Companions....Pages 263-275
The Iron Curtain of WC9 Stars....Pages 277-281
A Spectroscopic Search for Duplicity among a Complete Sample of Northern Galactic Wolf-Rayet Stars....Pages 283-287
Is HD 164270 a Long-Period Eclipsing Binary?....Pages 289-293
A Spectral Study of HD 50896....Pages 295-298
Observations of New Wolf-Rayet Binaries....Pages 299-304
Front Matter....Pages 249-249
The Velocity Field of S308. The Ring Nebula Around the WN 5 Star HD 50896....Pages 305-309
Spectral Variations of Theta Muscae (WC 6 + 0 9.5 I) in the Ultraviolet....Pages 311-315
The Wolf-Rayet Eclipsing Binary HD 5980 in the Small Magellanic Cloud....Pages 317-320
Front Matter....Pages 321-321
The Evolution of Massive Stars: The Production of “Single” WR Stars....Pages 323-341
The Evolution of Massive Stars — The Production of Binary WR Stars....Pages 343-358
Gradients in Supergiant and WR Stars Across the Galactic Plane....Pages 359-363
On the Expected Frequency of WR + Compact Star Systems....Pages 365-369
Properties of the Scenario for the Formation of WR Stars as Post-Red Supergiants....Pages 371-375
Origin and Evolution of Wolf-Rayet Stars....Pages 377-381
The Massive Eclipsing Binary RY Scuti....Pages 383-386
The Wo Wolf-Rayet Stars....Pages 387-392
The on Stars: A Wider Spectroscopic Definition....Pages 393-396
On the Structure and Evolution of the OB-Companions in Wolf-Rayet Binaries....Pages 397-401
The Occurrence of Different Wolf-Rayet Phases in Massive Close Binaries....Pages 403-403
The Various Scenarios Leading to WR Stars: Their Relative Importance and the Role of Mixing....Pages 405-409
Front Matter....Pages 411-411
Low Mass Wolf-Rayet Stars: Theory....Pages 413-422
Subluminous Wolf-Rayet Stars: Observations....Pages 423-445
The Peculiar Binary System HD 45166 (SdO+B8V?)....Pages 447-451
The UV Spectrum of the Central Star of NGC 40....Pages 453-456
A Reclassification of WC and “O VI” Central Stars of Planetary Nebulae, and Comparison with Population I WC Stars....Pages 457-461
Front Matter....Pages 411-411
A New Search for Nebulae Surrounding Wolf-Rayet Stars....Pages 463-468
Ring Nebulae Associated with Wolf-Rayet Stars....Pages 469-472
Ring Nebulae Around WC6 Stars: NGC 6357 Around HD 157 504....Pages 473-477
Kinematics of the Ring-Shaped Nebula N206 in the LMC....Pages 479-483
WR Stars with Ring Nebulae....Pages 485-489
IUE Observations of the WN-C Star HD 62910....Pages 491-495
Front Matter....Pages 497-497
Observations and the Wolf-Rayet Evolutionary Scenario....Pages 499-513
Wolf-Rayet Stars in the Magellanic Clouds: Spectroscopic Binaries and Masses....Pages 515-521
Absolute Magnitudes of Wolf-Rayet Stars: The WN3 and WN4 Sub-Classes in the Large Magellanic Cloud....Pages 523-526
Near Infrared Observations of Magellanic WN Stars....Pages 527-530
The First Detection of Wolf-Rayet Stars in M31....Pages 531-537
Wolf-Rayet Stars in Open Clusters and Associations....Pages 539-543
The Wolf-Rayet Stars in 30 Doradus....Pages 545-549
Spectra of the Wolf-Rayet Stars in 30 Doradus....Pages 551-554
NGC 604 — A Giant H II Region Dominated by Many WR Stars....Pages 555-556
Wolf-Rayet Stars Associated to Giant Regions of Star Formation....Pages 557-562
The Central Object of the 30 Doradus Nebula, a Supermassive Star....Pages 563-565
Front Matter....Pages 567-567
Wolf-Rayet Stars Featured in Emission-Line Galaxies....Pages 569-570
Comments on the Significance of the Positions of Population I Wolf-Rayet Stars in the HR Diagram....Pages 571-575
Time-Dependent X-ray Observations of Wolf-Rayet Binaries with 0-Type and with Suspected Compact Companions....Pages 577-581
Front Matter....Pages 567-567
Lines Profile Variations and Binarity in Wolf-Rayet Stars....Pages 583-587
X-Rays from Wolf-Rayet Stars Observed by the Einstein Observatory....Pages 589-595
Summary of Symposium....Pages 597-603
Back Matter....Pages 605-618