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 nature of the X-ray halo of the plerion G21.5–0.9 unveiled by XMM-Newton and Chandra
TL;DR: In this article, a self-consistent scenario for the radio-quiet X-ray halo around the plerionic supernova remnant G21.5-0.9 is presented.
Radio and X-ray Observations of the Type Ic SN 2007gr Reveal an Ordinary, Non-relativistic Explosion
TL;DR: In this article, the authors present extensive radio and X-ray observations of the nearby Type Ic SN 2007gr in NGC 1058 obtained with the Very Large Array and the Chandra Xray Observatory and spanning 5 to 150 days after explosion.
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Modelling the Hubble Space Telescope Ultraviolet and Optical Spectrum of Spot 1 on the Circumstellar Ring of SN 1987A
Chun S. J. Pun,Eli Michael,Svetozar A. Zhekov,Richard McCray,Peter M. Garnavich,Peter M. Challis,Robert P. Kirshner,E. Baron,David Branch,Roger A. Chevalier,Alexei V. Filippenko,Claes Fransson,Bruno Leibundgut,Peter Lundqvist,Nino Panagia,M. M. Phillips,Brian P. Schmidt,George Sonneborn,Nicholas B. Suntzeff,Lifan Wang,J. Craig Wheeler +20 more
TL;DR: In this article, the authors report and interpret HST/STIS long-slit observations of the optical and ultraviolet (1150 - 10270 Angstrom) emission-line spectra of rapidly brightening Spot 1 on the equatorial ring of SN 1987A between 1997 September and 1999 October (days 3869 -- 4606 after outburst).
The X‐ray spectrum and light curve of Supernova 1995N
Derek Fox,Walter H. G. Lewin,Andrew C. Fabian,K. Iwasawa,R. Terlevich,H. Zimmermann,Bernd Aschenbach,K. W. Weiler,S. D. Van Dyk,Roger A. Chevalier,Robert E. Rutledge,Hajime Inoue,S. Uno +12 more
TL;DR: In this article, the authors report on multi-epoch X-ray observations of the Type IIn (narrow emissionline) supernova SN 1995N with the ROSAT and ASCA satellites.
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Hst -cos observations of hydrogen, helium, carbon, and nitrogen emission from the sn 1987a reverse shock
Richard McCray,Steven V. Penton,Robert P. Kirshner,Peter Challis,J. Martin Laming,Patrice Bouchet,Roger A. Chevalier,Peter M. Garnavich,Claes Fransson,Kevin Heng,Josefin Larsson,Stephen S. Lawrence,Peter Lundqvist,Nino Panagia,Chun S. J. Pun,Nathan Smith,Jesper Sollerman,George Sonneborn,Ben Sugerman,J. Craig Wheeler +19 more
TL;DR: In this paper, the most sensitive ultraviolet observations of Supernova 1987 A to date were presented, showing that the N/C abundance ratio in the gas crossing the reverse shock is significantly higher than that in the circumstellar ring, a result that may be attributed to chemical stratification in the outer envelope of the supernova progenitor.