317 citations · 6.1k across the 114 of their papers we have counts for
115 papers
Optical Discovery of New and Candidate Galactic Supernova Remnants Plus Optical Imaging of the Monogem Supernova Remnant
Robert A. Fesen, Marcel Drechsler, Bray Falls +16
We report the discovery of new and candidate Galactic supernova remnants made through over 2000 hours of H and [O III] imaging using amateur class instrumentation. These nebulae…
Deciphering the "Green Monster" in Cassiopeia A: Puncturing and sculpting a heterogeneous circumstellar shell
S. Orlando, H. -T. Janka, D. Milisavljevic +6
JWST observations of Cassiopeia A have revealed the "Green Monster" (GM), a pockmarked region of shocked circumstellar medium (CSM) characterized by circular holes surrounded by br…
Detection of High-Velocity NaI Absorption Toward the Stellar Remnant of SN 1181 AD
Peter Garnavich, Robert A. Fesen
We report the detection of weak high-velocity NaI absorption at V = km s in the spectrum of the stellar remnant at the center of the Galactic sup…
The Ejecta Nebula Around the Wolf-Rayet Star WR 71
Robert A. Fesen, Manuel C. Peitsch, Martin R. Pugh +2
We present deep H and [O III] images of the ejecta rich nebulosity associated with the suspected runaway and binary Wolf-Rayet star WR~71 (HD 143414). In H emission, the nebu…
Deep Optical Images of the Ejecta Nebula Around the Wolf-Rayet Star WR 8 (HD 62910)
Robert A. Fesen, Daniel Patnaude, Wei-Hao Wang +7
We report the results of deep H and [O III] images of the bright WN6/WC4 Wolf-Rayet star WR~8 (HD~62910). These data show considerably more surrounding nebulosity than seen in p…
Cassiopeia A's Reverse Shock and its Effects on the Expanding SN Ejecta
Robert A. Fesen, Dan Milisavljevic, Daniel Patnaude +4
Using optical and near-infrared images of the Cassiopeia A (Cas A) supernova remnant covering the time period 1951 to 2022, together with optical spectra of selected filaments, we…