17 papers
Observable Signatures of the Accretion-Induced Collapse of White Dwarfs
B. D. Metzger, A. L. Piro, E. Quataert +1
Despite its probable occurrence in Nature, the accretion-induced collapse (AIC) of a white dwarf has not yet been directly observed (or, at least, it has not been unambiguously ide…
The Dynamic X-ray Sky of the Local Universe
Alicia M. Soderberg, Jonathan E. Grindlay, Joshua S. Bloom +35
Over the next decade, we can expect time domain astronomy to flourish at optical and radio wavelengths. In parallel with these efforts, a dedicated transient "machine" operating at…
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…
The Turbulent Story of X-ray Bursts: Effects of Shear Mixing on Accreting Neutron Stars
Anthony L. Piro, Lars Bildsten
During accretion, a neutron star (NS) is spun up as angular momentum is transported through its liquid surface layers. We study the resulting differentially rotating profile, focus…
Fragmentation of Collapsar Disks and the Production of Gravitational Waves
Anthony L. Piro, Eric Pfahl
We argue that gravitational instability in the outer parts of collapsar disks may lead to fragmentation near the radius where helium photodisintegrates, because of the strong cooli…