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27 papers · 2 filters
Don't Blink: Constraining the Circumstellar Environment of the Interacting Type Ia Supernova 2015cp
C. E. Harris, P. E. Nugent, A. Horesh +12
Despite their cosmological utility, the progenitors of Type Ia supernovae (SNe Ia) are still unknown, with many efforts focused on whether accretion from a nondegenerate companion…
Cooling off with a kilonova - Lower Limit on the Expansion Velocity of GW170817
Itai Linial, Re'em Sari
GW170817 was the first detection of a binary neutron star merger via gravitational waves. The event was observed over a wide range of the electromagnetic spectrum, revealing a ther…
The role of radioactive nickel in shaping the plateau phase of Type II supernovae
Alexandra Kozyreva, Ehud Nakar, Roni Waldman
In the present study, we systematically explore the effect of the radioactive 56Ni and its mixing properties in the ejecta on the plateau of Type IIP supernovae (SNe). We evaluate…
The deepest Chandra X-ray study of the plerionic supernova remnant G21.50.9
Benson Guest, Samar Safi-Harb, Xiaping Tang
G21.5-0.9 is a plerionic supernova remnant (SNR) used as a calibration target for the Chandra X-ray telescope. The first observations found an extended halo surrounding the bright…
A hot and fast ultra-stripped supernova that likely formed a compact neutron star binary
K. De, M. M. Kasliwal, E. O. Ofek +24
Compact neutron star binary systems are produced from binary massive stars through stellar evolution involving up to two supernova explosions. The final stages in the formation of…
Delayed jet breakouts from binary neutron star mergers
Tatsuya Matsumoto, Shigeo S. Kimura
Short gamma-ray bursts (sGRBs) are thought to be produced by binary NS mergers. While a sGRB requires a relativistic jet to break out of ejecta, the jet may be choked and fails to…