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
The stability of an accelerating shock wave in an exponential atmosphere
TL;DR: In this paper, the stability of a self-similar solution for an accelerating shock wave in an exponential atmosphere is studied using a linearized, normal mode analysis, and an eigenvalue is determined by passing the solution through a critical point in the post-shock flow.
Multiwavelength Observations of GRB 050820A: An Exceptionally Energetic Event Followed from Start to Finish
Stephen Bradley Cenko,Mansi M. Kasliwal,Fiona A. Harrison,V. Pal'Shin,Dale A. Frail,P. B. Cameron,Edo Berger,Edo Berger,D. B. Fox,Avishay Gal-Yam,Shrinivas R. Kulkarni,D.-S. Moon,Ehud Nakar,Eran O. Ofek,Bryan E. Penprase,P. A. Price,Ramazan Sari,Brian P. Schmidt,Alicia M. Soderberg,R. Aptekar,D. D. Frederiks,S. Golenetskii,David N. Burrows,Roger A. Chevalier,N. Gehrels,Patrick J. McCarthy,J. A. Nousek,Tsvi Piran +27 more
TL;DR: In this paper, the authors present observations of the unusually bright and long γ-ray burst GRB 050820A, one of the best sampled broadband data sets in the Swift era.
The evolution of cooling flows. II - Galaxies and galaxy formation
TL;DR: In this article, self-similar solutions are presented for the idealized case of a spherical galaxy with a singular isothermal gravitational potential where the ISM is built up from mass loss by stars or by accretion of external gas.
Random Gravitational Encounters and the Evolution of Spherical Systems. V. Gravitational Shocks
Lyman Spitzer,Roger A. Chevalier +1 more
TL;DR: In this article, it was shown that the rate of shock heating required to avert the collapse of the central core is substantially greater than previously realized, requiring that t/sub sh/ be less than about 5t/sub rh/, where rh/ is the reference relaxation time at the mean density within the median radius.