Wolf Rayet Stars Observations Physics Evolution

Proceedings of IAU Symposium No. 99, held at Cozumel, Mexico, September 18-22, 1981

Author: International Astronomical Union. Symposium

Publisher: Springer Science & Business Media

ISBN: 902771469X

Category: Science

Page: 618

View: 892

Download →

Proceedings of IAU Symposium No. 99, held at Cozumel, Mexico, September 18-22, 1981
Posted in:

Wolf Rayet Stars Observations Physics Evolution

The formative ideas for this symposium originated in 1978 at the IAU Symposium No. 83 on "Mass Loss and Evolution of O-type Stars" held at Qualicum Beach, Vancouver Island, Canada - WR stars generally figure prominently in O-star meetings ...

Author: C. de Loore

Publisher: Springer Science & Business Media

ISBN: 9789400979109

Category: Science

Page: 636

View: 750

Download →

The formative ideas for this symposium originated in 1978 at the IAU Symposium No. 83 on "Mass Loss and Evolution of O-type Stars" held at Qualicum Beach, Vancouver Island, Canada - WR stars generally figure prominently in O-star meetings and vice versa! Following general appro val by the IAU Executive Committee the initial ideas were cemented at a subsequent meeting, IAU Colloquium No. 59 on "The Effects of Mass Loss on Stellar Evolution", held at Miramare, Trieste, Italy in 1980, which was attended by the ma,jority of the present Scientific Organising Committee and at which meeting the outline programme for this symposium was formulated. 1981 was considered an appropriate year in which to hold a meeting on WR stars, since the last IAU Symposium devoted to this stellar class had been held a decade earlier, in Buenos Aires (IAU Sym posium No. 49), and during this intervening period a wealth of new observational material had been obtained for WR stars together with significant advances on the theoretical front. The venue for this sym posium was chosen from the requirement, which can be inferred from the above, that a meeting on 'hot' stars take place in an appropriate, sunny climate and followed upon the excellent suggestion of Dr. C. Firmani to hold the symposium in Mexico.
Posted in:

Wolf Rayet Stars Observations Physics Evolution

The formative ideas for this symposium originated in 1978 at the IAU Symposium No. 83 on "Mass Loss and Evolution of O-type Stars" held at Qualicum Beach, Vancouver Island, Canada - WR stars generally figure prominently in O-star meetings ...

Author: C. de Loore

Publisher: Springer

ISBN: 902771469X

Category: Science

Page: 636

View: 427

Download →

The formative ideas for this symposium originated in 1978 at the IAU Symposium No. 83 on "Mass Loss and Evolution of O-type Stars" held at Qualicum Beach, Vancouver Island, Canada - WR stars generally figure prominently in O-star meetings and vice versa! Following general appro val by the IAU Executive Committee the initial ideas were cemented at a subsequent meeting, IAU Colloquium No. 59 on "The Effects of Mass Loss on Stellar Evolution", held at Miramare, Trieste, Italy in 1980, which was attended by the ma,jority of the present Scientific Organising Committee and at which meeting the outline programme for this symposium was formulated. 1981 was considered an appropriate year in which to hold a meeting on WR stars, since the last IAU Symposium devoted to this stellar class had been held a decade earlier, in Buenos Aires (IAU Sym posium No. 49), and during this intervening period a wealth of new observational material had been obtained for WR stars together with significant advances on the theoretical front. The venue for this sym posium was chosen from the requirement, which can be inferred from the above, that a meeting on 'hot' stars take place in an appropriate, sunny climate and followed upon the excellent suggestion of Dr. C. Firmani to hold the symposium in Mexico.
Posted in:

Literature 1982 Part 2

Wolf-Rayet stars: observations, physics, evolution, (see 012.042), p. 73-78 (1982). The spectra of a variety of Wolf-Rayet stars have been observed with ~1% spectral resolution in the 1.4 – 4.1 um region using UKIRT.

Author: Siegfried Böhme

Publisher: Springer Science & Business Media

ISBN: 9783662123379

Category: Science

Page: 850

View: 318

Download →

Astronomy and Astrophysics Abstracts, which has appeared in semi-annual volumes since 1969, is devoted to the recording, summarizing and indexing of astronomical publications throughout the world. It is prepared under the auspices of the International Astronomical Union (according to a resolution adopted at the 14th General Assembly in 1970). Astronomy and Astrophysics Abstracts aims to present a comprehensive documenta tion of literature in all fields of astronomy and astrophysics. Every effort will be made to ensure that the average time interval between the date of receipt of the original literature and publication of the abstracts will not exceed eight months. This time interval is near to that achieved by monthly abstracting journals, compared to which our system of accumu lating abstracts for about six months offers the advantage of greater convenience for the user. Volume 32 contains literature published in 1982 and received before February 11, 1983; some older literature which was received late and which is not recorded in earlier volumes is also included. We acknowledge with thanks contributions to this volume by Dr. J. Bou~a, Prague, who surveyed journals and publications in Czech and supplied us with abstracts in English.
Posted in:

Instability and Variability of Hot Star Winds

99 Wolf-Rayet Stars: Observations, Physics, Evolution, Kluwer:Dordrecht, p. 323 Conti, P.; 1982, “Wolf-Rayet Phenomena” in eds. C. W. H. de Loore & A. J. Willis, ed(s)., IAU Symp. 99 Wolf-Rayet Stars: Observations, Physics, Evolution, ...

Author: Anthony F.J. Moffat

Publisher: Springer Science & Business Media

ISBN: 9789401103152

Category: Science

Page: 501

View: 670

Download →

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.
Posted in:

Wolf Rayet Stars

Binaries, Colliding Winds, Evolution Karel A. van der Hucht, Peredur M. Williams. EVIDENCE FOR COLLIDING WINDS M.F. CORCORAN", ... Wolf-Rayet Stars: Observations, Physics, Evolution, Proc. IAU Symp. No. 99 (Dordrecht: Reidel), p.

Author: Karel A. van der Hucht

Publisher: Springer Science & Business Media

ISBN: 9789401102056

Category: Science

Page: 580

View: 609

Download →

In this IAU Symposium on Wolf--Rayet stars, binary aspects received ample attention, notably because of the recognition that many observations of spectral and photometric variability at all accessible wavelengths are related to colliding winds or other forms of wind interaction. The basic structure of the conference and its proceedings is basic parameters and general properties of WR stars; state of the art model atmospheres for WR stars, anisotropic mass loss and disk formation of WR stars, properties of WR binaries; influence of stellar winds on mass transfer in hot massive binary evolution; dust formation near WR stars and other circumstellar phenomena; and hydrodynamics and high-energy physics of colliding winds in WR+O binaries and of WR winds interacting with compact objects. Within this framework 20 invited reviews, 38 invited oral contributions, and 76 poster papers were presented at the Symposium, entertaining 111 astronomers from 24 countries. These proceedings provide up-to-date information on all aspects of Wolf--Rayet atmospheres, binaries, and colliding winds.
Posted in:

Radio Stars

Hogg, D.E., 1982 in IAU Symp N99 Wolf-Rayet stars: observations, physics, evolution. Eds. C. W. H. De Loore and A.J. Willis, (Dordrecht: D. Reidel), p. 221. Khaliullin, Kh.F., 1980, in Proc. of the meeting "Ejection and Accretion of ...

Author: R. Hjellming

Publisher: Springer Science & Business Media

ISBN: 9789400954205

Category: Science

Page: 418

View: 265

Download →

This book is the proceedings of a workshop on stellar continuum radio astronomy that was held in BoUlder, Colorado on August 8-10, 1984. Although it was originally intended to be a small workshop with participants mainly from North America, it evolved to a workshop with 72 partiCipants from twelve countries (U.S.A. 52, Canada 3, the Netherlands 3, United Kingdom 3, Australia 2, Ireland 2, Italy 2, France 1, Mexico 1, Switzerland 1, West Germany 1, and U.S.S.R. 1). This workshop was sponsored by the Joint Institute of Laboratory Astrophysics (JILA) and the University of Colorado. In order to preserve a workshop atmosphere, while still presenting both extensive reviews and contributed papers, an experimental format was adopted. All contributed papers related to the topiCS of the day were presented in poster form in the early morning and were accessible all day. During each morning (or afternoon) session review papers were presented, followed by a coffee break in the poster area adjacent to the conference room. Then the review papers and contributed papers were discussed for roughly one and a half hours. The last session was devoted to invited panel papers and discussion of current and future problems in the field of stellar radio astronomy.
Posted in:

Instruments and Analysis Techniques for Space Physics

99 , Wolf - Rayet Stars : Observations , Physics , and Evolution , eds . C . de Loore and A . J . Willis ( Dordrecht , Holland : Reidel ) , in press . 6 . Willis , A . J . 1982 , in IAU Symposium No . 99 , Wolf - Rayet Stars ...

Author: D. R. McDiarmid

Publisher: Pergamon Press

ISBN: UOM:39015015946554

Category: Science

Page: 178

View: 997

Download →

Posted in:

Stellar Nucleosynthesis

Abbot, D.C., 1982b, in "WolfRayet Stars: Observations, Physics, Evolution". eds. C.W.H. de Loore and J.A. Willis (Reidel) p.185. Arnett, W.D., 1972, Ap.J., 176,681. Arnett W.D. and Thielemann, 1984, this volume.

Author: C. Chiosi

Publisher: Springer Science & Business Media

ISBN: 9789400963481

Category: Science

Page: 411

View: 147

Download →

x about a sequence of reVlew lectures, each followed by contributed talks and discussions. The opening session was devoted to reviewing the most recent results concerning the determination of chemical abundances in particularly inte resting objects providing direct evidence for stellar nucleosynthesis (like planetary nebulae, supernovae and supernova remnants). In Session 2 recent results on some relevant nuclear reaction rates have been presented. Session 3 grouped the contributions concerning the quasi-static evolution of normal stars, its relevance for the nucleosynthesis of the varlOUS elements and isotopes, and the comparison of the evolutionary models with the observations. Session 4 addressed the important questions of identifying the precursors of both Type I and Type II supernovae, and of determining the detailed composition of the ejecta by explosive nucleosynthesis associated with these events. Finally, Session 5 was devoted to a presentation of recent calculations of the evolution of hypothetical pre-galactic very massive objects (in cluding their potential role in pre-galactic nucleosynthesis), and to reviewing the progress that has been made in understanding the chemical evolution of galaxies. The discussion during and after talks was spirited and contributed signi ficantly to the succes of the workshop. We regrett for not having been able of reporting it "in toto" in the proceedings. Nevertheless, we hope that what has been recorded may still give to the reader at least part of the excitement we have experienced during the ten days of the workshop.
Posted in: