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
Optical emission from a fast shock wave - The remnants of Tycho's supernova and SN 1006
TL;DR: In this paper, the authors used a model in which a collisionless shock wave is moving into partially neutral gas, and the presence of the neutral gas can be used to set an upper limit of approximately 5 x 10 to the 47th power ergs to the energy in ionizing radiation emitted by a Type I supernova.
Supernove interaction with a circumstellar wind and the distance to SN 1979c
Roger A. Chevalier,Claes Fransson +1 more
- 01 Jan 1985
TL;DR: In this article, the radio angular diameter and X-ray flux of supernova SN 1979c and SN 1980k were combined with a distance dependent quantity to determine the distance to the supernova.
Wind-Interaction Models for the Early Afterglows of Gamma-Ray Bursts: The Case of GRB 021004
Zhi-Yun Li,Roger A. Chevalier +1 more
TL;DR: In this article, a steepening in the slope of temporal decay was observed in the early afterglow light curves of gamma-ray burst (GRB 021004) around day 0.1.
Nonlinear instability of accelerating shock waves with application to supernovae
Ding Luo,Roger A. Chevalier +1 more
TL;DR: In this paper, the stability of a planar accelerating shock front in an exponential atmosphere was investigated and the results of the semianalytic linear analysis in the linear regime were confirmed in the nonlinear regime.
X-Ray Observations of Type Ia Supernovae with Swift: Evidence for Circumstellar Interaction for SN 2005ke
Stefan Immler,Peter Brown,Peter Milne,Robert Petre,N. Gehrels,David N. Burrows,J. A. Nousek,Christopher L. Williams,Elena Pian,Paolo A. Mazzali,K. Nomoto,Roger A. Chevalier,V. Mangano,S. T. Holland,P. W. A. Roming,Jochen Greiner,D. Pooley +16 more
TL;DR: In this article, the early X-ray and UV properties of eight Type Ia supernovae (SNe Ia) have been extensively observed with the X-Ray Telescope (XRT) and UV/Optical Telescope (UVOT) onboard Swift, ranging from 5-132 days after the outburst.