Measuring the Ejecta Velocities of Type Ia Supernovae from the Pan-STARRS1 Medium Deep Survey
(2022)
Testing afterglow models of FRB 200428 with early post-burst observations of SGR 1935 + 2154
Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 517:4 (2022) 5483-5495
Optical Spectroscopy of Blazars for the Cherenkov Telescope Array -- II
(2022)
A Quarter Century of Guitar Nebula/Filament Evolution
The Astrophysical Journal American Astronomical Society 939:2 (2022) 70-70
Abstract:
We have collected a new deep Chandra X-Ray Observatory exposure of PSR B2224+65 and the "Guitar Nebula," mapping the complex X-ray structure. This is accompanied by a new Hubble Space Telescope (HST) Hα image of the head of the Guitar. Comparing the HST and Chandra structures in four epochs over 25 yr, we constrain the evolution of the TeV particles that light up the filament. Cross-field diffusion appears to be enhanced, likely by the injected particles, behind the filament's sharp leading edge, explaining the filament width and its evolving surface brightness profile...Constraints on axionlike particles from a combined analysis of three flaring $\textit{Fermi}$ flat-spectrum radio quasars
(2022)