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
Illuminating a red supergiant wind around SN 1987A
TL;DR: In this paper, a recently discovered light echo at a radius of about 9 arcsec from SN 1987A is interpreted as the result of a circumstellar shell, which may have its origin in the deceleration of the pre-SN red supergiant wind by the pressure of the surrounding medium.
The nearby Type Ibn supernova 2015G: signatures of asymmetry and progenitor constraints
Isaac Shivvers,Wei Kang Zheng,Schuyler D. Van Dyk,Jon C. Mauerhan,Alexei V. Filippenko,Nathan Smith,Ryan J. Foley,Paolo A. Mazzali,Paolo A. Mazzali,Atish Kamble,Charles D. Kilpatrick,Raffaella Margutti,H. Yuk,H. Yuk,Melissa L. Graham,Melissa L. Graham,Patrick L. Kelly,Jennifer Andrews,Thomas Matheson,W. Michael Wood-Vasey,K. A. Ponder,Peter de Nully Brown,Roger A. Chevalier,Dan Milisavljevic,Maria R. Drout,Maria R. Drout,J. T. Parrent,Alicia M. Soderberg,Chris Ashall,A. S. Piascik,S. J. Prentice +30 more
TL;DR: In this paper, Bengier et al. proposed a method for the analysis of the data from the Space Telescope Science Institute (TSI) and NASA's Astrophysics Data Analysis Program (NNX13AF35G).
X-ray emission from SN 2012ca: A Type Ia-CSM supernova explosion in a dense surrounding medium.
Christopher D. Bochenek,Christopher D. Bochenek,Vikram V. Dwarkadas,Jeffrey M. Silverman,O. D. Fox,Roger A. Chevalier,Nathan Smith,Alexei V. Filippenko +7 more
TL;DR: In this paper, the presence of hydrogen in the initial spectrum led to a classification of Type Ia-CSM, making it the first SN Ia detected with X-rays.
The Presupernova H II Region around SN 1987A
TL;DR: In this article, the authors proposed that the supernova shock is interacting with an H II region created by the B3 Ia progenitor star in the swept-up red supergiant wind.
Electron Scattering Wings on Lines in Interacting Supernovae
TL;DR: In this paper, the effect of electron scattering on lines emitted as a result of supernova interaction with a circumstellar medium, assuming that the scattering occurs in ionized gas in the preshock medium, was considered.