Roger A. Chevalier
University of Virginia
288 Papers
3K Citations
Roger A. Chevalier is an academic researcher from University of Virginia. The author has contributed to research in topics: Supernova & Supernova remnant. The author has an hindex of 87, co-authored 284 publications. Previous affiliations of Roger A. Chevalier include Kitt Peak National Observatory & Advanced Technology Center.
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Papers
Gamma-Ray Emission from Supernova Remnant Interaction with Molecular Clumps
Xiaping Tang,Roger A. Chevalier +1 more
TL;DR: In this article, the authors suggest that the radio emission is associated with a radiative shell in the interclump medium of a molecular cloud, while the gamma-ray emission is primarily associated with the interaction of the radiative shells with molecular clumps.
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Late Spectral Evolution of the Ejecta and Reverse Shock in SN1987A
Claes Fransson,Josefin Larsson,Jason Spyromilio,Roger A. Chevalier,Per Gröningsson,Anders Jerkstrand,Bruno Leibundgut,Richard McCray,Peter Challis,Robert P. Kirshner,Karina Kjaer,Peter Lundqvist,Jesper Sollerman +12 more
TL;DR: In this paper, the authors present observations with VLT and HST of the broad emission lines from the inner ejecta and reverse shock of SN 1987A from 1999 until 2012 (days 4381 -- 9100 after explosion).
The interaction of supernova 1987A with dense circumstellar gas
TL;DR: In this article, the light travel time effects on the evolution of line fluxes, line profiles, and spatial structure of the emission from supernova 1987A are described, and the narrow lines are predicted to shift to the red at a rate depending on the shell age.
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Coronal emission from the shocked circumstellar ring of SN 1987A
Per Gröningsson,Claes Fransson,Peter Lundqvist,Tanja K. Nymark,Natalia Lundqvist,Roger A. Chevalier,Bruno Leibundgut,Jason Spyromilio +7 more
TL;DR: In this article, high resolution spectra with UVES/VLT of SN 1987A from December 2000 until November 2005 show a number of high ionization lines from gas with velocities of similar to +/- 350 km s(-1), emerging fr...
Grb 010921: strong limits on an underlying supernova from the
Shrinivas R. Kulkarni,Brian P. Schmidt,Titus Galama,J. S. Bloom,Edo Berger,Dale A. Frail,S. G. Djorgovski,D. W. Fox,A. A. Henden,S. Klose,Fiona A. Harrison,Daniel E. Reichart,Ramazan Sari,S. A. Yost,Tim Axelrod,Patrick J. McCarthy,Jon A. Holtzman,J. P. Halpern,Randy A. Kimble,John C Wheeler,Roger A. Chevalier,K. Hurley,George R. Ricker,Enrico Costa,Filippo Frontera,L. Piro +25 more
TL;DR: The first HETE-2 gamma-ray burst (GRB 010921) was localized via its afterglow emission in this paper, which was the first gamma ray burst to be localized via the afterglove emission.