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
Infrared supernova light curves and asymmetric stellar mass loss
TL;DR: In this article, it is shown that an asymmetric dust distribution can have a substantial effect on the evolution of an infrared echo and results are presented for an ellipsoidal dust distribution.
The signature of the central engine in the weakest relativistic explosions: grb 100316d
R. Margutti,Alicia M. Soderberg,Mark H. Wieringa,Philip G. Edwards,Roger A. Chevalier,Brian J. Morsony,R. Barniol Duran,Lorenzo Sironi,B. A. Zauderer,Dan Milisavljevic,Atish Kamble,Elena Pian +11 more
TL;DR: In this paper, a broad-band analysis of the gamma-ray burst (GRB)100316D associated with supernova (SN) 2010bh was presented, and it was shown that the explosion properties of the GRB were intermediate between highly relativistic, collimated GRBs and the spherical, ordinary hydrogen-stripped SNe.
The optical emission from a fast shock wave with application to supernova remnants.
TL;DR: In this paper, the spectrum of Tycho's supernova remnant has been observed in terms of a shock wave model, where the shock wave is presumably encountering neutral atoms that have some probability of giving line emission before being ionized by the post-shock gas.
Late spectral evolution of the ejecta and reverse shock in sn 1987a
Claes Fransson,Josefin Larsson,Jason Spyromilio,Roger A. Chevalier,Per Gröningsson,Anders Jerkstrand,Anders Jerkstrand,Bruno Leibundgut,Richard McCray,Peter Challis,Robert P. Kirshner,Karina Kjaer,Peter Lundqvist,Jesper Sollerman +13 more
TL;DR: In this paper, the authors present observations with the Very Large Telescope and Hubble Space Telescope (HST) of the broad emission lines from the inner ejecta and reverse shock of SN 1987A from 1999 February until 2012 January (days 4381-9100 after explosion).
A Hubble Space Telescope Ultraviolet Spectrum of SN 1993J
David J. Jeffery,Robert P. Kirshner,Peter M. Challis,Chun S. J. Pun,Alexei V. Filippenko,Thomas Matheson,David Branch,Roger A. Chevalier,Claes Fransson,Nino Panagia,Nino Panagia,Robert V. Wagoner,J. Craig Wheeler,A. Clocchiatti +13 more
TL;DR: In this article, the authors obtained a Hubble Space Telescope (HST) ultraviolet spectrum of the Type II supernova SN 1993J in M81 on 1993 April 15, and the approximately 1650-2900 A region is smoother than observed for SN 1987A and SN 1992A and lacks strong P Cygni absorptions caused by iron peak element lines.