Instability and Variability of Hot-Star Winds

Proceedings of an International Workshop Held at Isle-aux-Coudres, Quebec Province, Canada 23–27 August, 1993

  • Anthony F. J. Moffat
  • Stanley P. Owocki
  • Alex W. Fullerton
  • Nicole St-Louis
Conference proceedings

Table of contents

  1. Front Matter
    Pages i-xiii
  2. Overview Talks

  3. Spectroscopic Observations of Structures in Winds of Ob Stars

    1. Front Matter
      Pages 65-66
    2. Raman K. Prinja, A. W. Fullerton
      Pages 67-76
    3. D. Massa, A. Fullterton, R. Prinja
      Pages 77-85
    4. C. T. Bolton
      Pages 95-101
  4. Connections between Photospheric and Wind Variability in Ob Stars

    1. Front Matter
      Pages 103-103
    2. A. W. Fullerton
      Pages 105-114
    3. L. Kaper, H. F. Henrichs
      Pages 115-133
  5. Spectroscopic Observations of Structure in Winds of Wr-Stars

    1. Front Matter
      Pages 135-136
    2. Stephan R. Mccandliss, Bruce Bohannan, Carmelle Robert, Anthony F. J. Moffat
      Pages 155-167
    3. E. Gosset, J. -M. Vreux, Y. Andrillat
      Pages 181-188
  6. Constraints on Wind Structure from IR and Radio Observations

  7. X-Ray Observations of Stellar-Wind Structure

    1. Front Matter
      Pages 275-275
    2. Joseph P. Cassinelli
      Pages 277-285
    3. Richard L. White, Wan Chen
      Pages 295-307
    4. Thomas W. Berghöfer, Jürgen H. M. M. Schmitt
      Pages 309-320
    5. A. J. Willis, H. Schild, I. D. Howarth, I. R. Stevens
      Pages 321-332
  8. Constraints on Wind Structure from Polarimetric Observations

    1. Front Matter
      Pages 333-333
    2. K. S. Bjorkman
      Pages 335-345
    3. Regina E. Schulte-Ladbeck
      Pages 347-356
    4. Tim J. Harries, Ian D. Howarth
      Pages 365-368
  9. Phenomenological Models of Time-Dependent Wind Structure

    1. Front Matter
      Pages 369-369
    2. Anne B. Underhill
      Pages 383-389
  10. Hydrodynamical Simulations of the Evolution of Wind Structure

    1. Front Matter
      Pages 391-391
    2. J. Puls, A. Feldmeier, U. W. E. Springmann, S. P. Owocki, A. W. Fullerton
      Pages 409-426
    3. R. G. Cooper, S. P. Owocki
      Pages 427-435
    4. S. P. Owocki, A. W. Fullerton, J. Puls
      Pages 437-441
    5. J. E. Bjorkman
      Pages 443-453
    6. S. P. Owocki, S. R. Cranmer, J. M. Blondin
      Pages 455-458
  11. Time-Dependent, Unstable Winds: Why Bother?

    1. Front Matter
      Pages 463-465
    2. Anthony F. J. Moffat
      Pages 467-480

About these proceedings


This specialized workshop was conceived during the workshop on "Non­ isotropic and Variable Outflows from Stars", which was held at the Space Telescope Science Institute in October, 1991. At that meeting, the four of us collectively decided that the time was ripe for an even more focussed discussion of the basic issues in the area of hot-star wind instability and its observable manifestations. Not that the big problems have been solved! Rather, we are currently in a phase of rapid development, both with regard to the models and to the observations. The key issue at this new workshop would be to decide how the time-dependent structures observed in hot-star winds (e. g. , NACs, DACs, blobs, clumps, filaments, shells, puffs, jets, etc. ) relate to radiative and other instabilities. Further questions concern the role of turbulence and the nature of its driver, and the effect of stellar rotation, pulsation, and magnetic fields on time-dependent phenomena in hot-star winds. Of no less importance is the impact of stellar wind variability on the derivation of mass-loss rates, on stellar evolution, and on momentum/energy deposition in the interstellar medium. To attain our goal of maximum confrontation (in the positive sense!) we decided: (1) to limit the workshop to the observers and theoreticians most active in this field in the world; (2) to insist that virtually all participants present a talk, thereby avoiding the distraction of poster sessions; and (3) to allocate approximately half of the allotted time to discussion.


astrophysics interstellar matter simulation stellar turbulence universe

Editors and affiliations

  • Anthony F. J. Moffat
    • 1
  • Stanley P. Owocki
    • 2
  • Alex W. Fullerton
    • 2
  • Nicole St-Louis
    • 1
  1. 1.Université de MontrealQuébecCanada
  2. 2.University of DelawareNewarkUSA

Bibliographic information