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Nickel-Rich Outflows from Accretion Disks Formed by the Accretion-Induced Collapse of White Dwarfs
B. D. Metzger, A. L. Piro, E. Quataert
A white dwarf (WD) approaching the Chandrasekhar mass may in several cases undergo accretion-induced collapse (AIC) to a neutron star (NS) before a thermonuclear explosion ensues.…
GRB 080503: Implications of a Naked Short Gamma-Ray Burst Dominated by Extended Emission
D. A. Perley, B. D. Metzger, J. Granot +22
We report on observations of GRB 080503, a short gamma-ray burst with very bright extended emission (about 30 times the gamma-ray fluence of the initial spike) in conjunction with…
Neutron-Rich Freeze-Out in Viscously Spreading Accretion Disks Formed from Compact Object Mergers
B. D. Metzger, A. L. Piro, E. Quataert
Accretion disks with masses ~0.001-0.1 Msun form during the merger of neutron star (NS)-NS and black hole-NS binaries. Initially, such hyper-accreting disks cool efficiently by neu…
Time-Dependent Models of Accretion Disks Formed from Compact Object Mergers
B. D. Metzger, A. L. Piro, E. Quataert
We present time-dependent models of the accretion disks created during compact object mergers, focusing on the energy available from accretion at late times and the composition of…
Convection during the Late Stages of Simmering in Type Ia Supernovae
Anthony L. Piro, Philip Chang
Following unstable ignition of carbon, but prior to explosion, a white dwarf (WD) in a Type Ia supernova (SN Ia) undergoes a simmering phase. During this time, a central convective…