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
1998 New HST Observations of High Velocity Ly α and H α in SNR 1987A
Eli Michael,Richard McCray,Chun S. J. Pun,Kazimierz J. Borkowski,Peter M. Garnavich,Peter Challis,Robert P. Kirshner,Roger A. Chevalier,A. V. Filippenko,Claes Fransson,Nino Panagia,Mark M. Phillips,Brian P. Schmidt,Nicholas B. Suntzeff,J. Craig Wheeler +14 more
TL;DR: In this paper , the authors describe and model high velocity Ly α and H α emission from supernova remnant 1987A seen in September and October 1997 with the Space Telescope Imaging Spectrograph.
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High resolution spectroscopy of the line emission from the inner circumstellar ring of SN 1987A and its hot spots
Per Gröningsson,Claes Fransson,Peter Lundqvist,Natalia Lundqvist,Bruno Leibundgut,Jason Spyromilio,Roger A. Chevalier,Roberto Gilmozzi,Karina Kjaer,Seppo Mattila,Jesper Sollerman +10 more
TL;DR: In this paper, 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 were discussed.
Astronomy: supernova bursts onto the scene.
TL;DR: A satellite telescope's chance observation of a burst of X-ray light might be the first record of a supernova's earliest minutes.
The Interaction of Supernova Ejecta with an Ambient Medium
Roger A. Chevalier
- 01 Jan 1983
TL;DR: In this article, self-similar solutions for the interaction region between the expanding supernova gas and the ambient gas exist provided that the expanding gas has ρ ∝ r-n with n > 5.
Effect of Ambient Wind Velocity on Planetary Nebula Morphology
Vikram V. Dwarkadas,Vikram V. Dwarkadas,Roger A. Chevalier,John M. Blondin +3 more
- 01 Jan 1997
TL;DR: Dwarkadas et al. as mentioned in this paper investigated the contribution of the ambient wind velocity to planetary nebulae morphology, and found that the nebular morphology is a consequence of the density contrast between pole and equator in the ambient medium, the steepness of a density profile and the velocity of ambient wind; classification of PNe purely on the basis of the first two factors may be misleading.