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What Gamma-Ray Bursts Explode Into
Roger A. Chevalier
The association of long gamma-ray bursts (GRBs) with Type Ib/c supernovae implies that they explode into the winds of their Wolf-Rayet progenitor stars. Although the evolution of s…
High resolution spectroscopy of the line emission from the inner circumstellar ring of SN 1987A and its hot spots
Per Groeningsson, Claes Fransson, Peter Lundqvist +8
We discuss high resolution VLT/UVES observations (FWHM ~ 6 km/s) from October 2002 (day ~5700 past explosion) of the shock interaction of SN 1987A and its circumstellar ring. A neb…
Circumstellar Interaction Around Type Ib/c Supernovae and the GRB Connection
R. A. Chevalier
Radio observations of Type Ib/c supernovae suggest that circumstellar interaction takes place with a wide range of wind densities, comparable to that seen in Galactic Wolf-Rayet st…
Pulsar Wind Nebulae and Their Supernovae
Roger A. Chevalier
Young supernova remnants that contain pulsar wind nebulae provide diagnostics for both the inner part of the supernova and the interaction with the surrounding medium, providing an…
Supernova Remnant and Pulsar Wind Nebula Interactions
Roger A. Chevalier
I review several topics in the structure of supernova remnants. Hydrodynamic instabilities in young remnants may give rise to the cellular structure that is sometimes observed, alt…
The Surroundings of Gamma-Ray Bursts: Constraints on Progenitors
Roger A. Chevalier
The association of a supernova with a gamma-ray burst (GRB 030329) implies a massive star progenitor, which is expected to have an environment formed by pre-burst stellar winds. Al…