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

ISBN 10: 9401041393 / ISBN 13: 9789401041393

Editore: Springer 2013-10-03, 2013

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Codice articolo 6666-IUK-9789401041393

Dati bibliografici

• Titolo: Instability and Variability of Hot-Star Winds: Proceedings of an International Workshop Held at Isle-aux-Coudres, Quebec Province, Canada 23-27 August, 1993
• Editore: Springer 2013-10-03
• Data di pubblicazione: 2013
• Lingua: Inglese
• ISBN 10: 9401041393
• ISBN 13: 9789401041393
• Rilegatura: Paperback
• Condizione: New

Descrizione articolo

Riassunto

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.

Contenuti

Preface. Overview Talks. Session 1: Spectroscopic Observations of Structures in Winds of OB Stars. Session 2: Connections between Photospheric and Wind Variability in OB Stars. Session 3: Spectroscopic Observations of Structure in Winds of WR-Stars. Session 4: Constraints on Wind Structure from IR and Radio Observations. Session 5: X-Ray Observations of Stellar-Wind Structure. Session 6: Constraints on Wind Structure from Polarimetric Observations. Session 7: Phenomenological Models of Time-Dependent Wind Structure. Session 8: Hydrodynamic Simulations of the Evolution of Wind Structure. Session 9: Time-Dependent, Unstable Winds: Why Bother? Round-Table Summary. Index.