Book contents
- Frontmatter
- Contents
- Preface
- Conference Photograph
- Conference Participants
- Part one Stellar Evolution and Wind Theory
- Part two Wolf-Rayet Ring Nebulae
- Part three Supernovae
- Supernovae and their circumstellar environment
- Radio supernovae and progenitor winds
- Circumstellar interaction in supernovae
- SN progenitor winds
- Supernovae with dense circumstellar winds
- Compact supernova remnants
- The evolution of compact supernova remnants
- Massive supernovae in binary systems
- The progenitor of SN 1993J
- Narrow lines from SN 1993J
- UV spectroscopy of SN 1993J
- Ryle Telescope observations of SN 1993J
- SN 1993J – early radio emission
- The circumstellar gas around SN 1987A and SN 1993J
- X-ray emission from SN 1987A and SN 1993J
- The interstellar medium towards SN 1993J in M81
- Part four Asymptotic Giant Branch stars
- Part five Planetary Nebulae
- Part six Novae and Symbiotic Stars
- Poster Papers
- Author Index
- Object Index
SN progenitor winds
from Part three - Supernovae
Published online by Cambridge University Press: 07 September 2010
- Frontmatter
- Contents
- Preface
- Conference Photograph
- Conference Participants
- Part one Stellar Evolution and Wind Theory
- Part two Wolf-Rayet Ring Nebulae
- Part three Supernovae
- Supernovae and their circumstellar environment
- Radio supernovae and progenitor winds
- Circumstellar interaction in supernovae
- SN progenitor winds
- Supernovae with dense circumstellar winds
- Compact supernova remnants
- The evolution of compact supernova remnants
- Massive supernovae in binary systems
- The progenitor of SN 1993J
- Narrow lines from SN 1993J
- UV spectroscopy of SN 1993J
- Ryle Telescope observations of SN 1993J
- SN 1993J – early radio emission
- The circumstellar gas around SN 1987A and SN 1993J
- X-ray emission from SN 1987A and SN 1993J
- The interstellar medium towards SN 1993J in M81
- Part four Asymptotic Giant Branch stars
- Part five Planetary Nebulae
- Part six Novae and Symbiotic Stars
- Poster Papers
- Author Index
- Object Index
Summary
Abstract
The conventional wisdom that a Type II supernova explosion occurs inside a spherical stellar wind bubble blown by the wind of the red supergiant progenitor misses two important points: the progenitor wind may be time-dependent, and it may be asymmetric. These two features of SN progenitor winds have been well illustrated by the ring observed around SN 1987A. The existence of this circumstellar shell directly implies a time-dependence in the wind on time scales less than about 10,000 years. Also, the shell is undeniably asymmetric, implying some form of asymmetry in the progenitor wind(s). Some of the theories for an asymmetric circumstellar medium include gravitational focussing in a wide binary, rotationally deformed wind, colliding winds in a binary system, and asymmetric mass ejection in a common envelope or accretion phase of a close binary system. The wind dynamics of these various theories will be reviewed with an eye toward understanding the true history of Sk -69°202.
Introduction
The standard picture of a Type II SN progenitor star is a red supergiant (RSG) that has evolved from a massive star with an initial main-sequence mass above ∼ 10M⊙. These RSGs are observed to have very massive, slow winds with terminal speeds in the range of 10 − 50 km s−1, and mass loss rates in the range of 10−7 − 10−5M⊙yr−1. These slow winds will gradually blow a stellar wind bubble of RSG wind into the relic main-sequence stellar wind bubble, building up a shell of shocked RSG wind at the edge of the expanding bubble.
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- Chapter
- Information
- Circumstellar Media in Late Stages of Stellar Evolution , pp. 139 - 147Publisher: Cambridge University PressPrint publication year: 1994
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