81 citations · 345 across the 16 of their papers we have counts for
17 papers
The 91T/99aa-like Type Ia Supernova 2019vrq, Part II: 3D, Non-LTE, Low-Amplitude, Pulsating Delayed-Detonation Models of a Promising Standard Candle
Peter Hoeflich, Yi Yang, J. Craig Wheeler +11
We analyze the overluminous, 91T/99aa-like Type~Ia SN 2019vrq, based on light curves(LCs) and spectropolarimetric time-series. We employ 3D-radiation-hydrodynamical, full non-LTE s…
Visualizing the mass transfer flow in direct-impact accretion
Juhan Frank, Alexander Straub, Sagiv Shiber +6
We use a variety of visualization techniques to display the interior and surface flows in a double white dwarf binary undergoing direct-impact mass transfer and evolving dynamicall…
Hydrodynamic simulations of WD-WD mergers and the origin of RCB stars
Sagiv Shiber, Orsola De Marco, Patrick M. Motl +10
We study the properties of double white dwarf (DWD) mergers by performing hydrodynamic simulations using the new and improved adaptive mesh refinement code Octo-Tiger. We follow th…
Evidence for stellar mergers of evolved massive binaries: blue supergiants in the Large Magellanic Cloud
Athira Menon, Andrea Ercolino, Miguel A. Urbaneja +8
Blue supergiants are the brightest stars in their host galaxies and yet their evolutionary status has been a long-standing problem in stellar astrophysics. In this pioneering work,…
Betelgeuse as a Merger of a Massive Star with a Companion
Sagiv Shiber, Emmanouil Chatzopoulos, Bradley Munson +1
We investigate the merger between a 16 solar mass star, on its way to becoming a red supergiant (RSG), and a 4 solar mass main-sequence companion. Our study employs three-dimension…
Simulating Stellar Merger using HPX/Kokkos on A64FX on Supercomputer Fugaku
Patrick Diehl, Gregor Daiß, Kevin Huck +4
The increasing availability of machines relying on non-GPU architectures, such as ARM A64FX in high-performance computing, provides a set of interesting challenges to application d…
Distributed, combined CPU and GPU profiling within HPX using APEX
Patrick Diehl, Gregor Daiss, Kevin Huck +6
Benchmarking and comparing performance of a scientific simulation across hardware platforms is a complex task. When the simulation in question is constructed with an asynchronous,…
Jets in Common Envelopes: a low mass main sequence star in a red giant
Diego Lopez-Camara, Fabio De Colle, Enrique Moreno Mendez +2
We present small-scale three-dimensional hydrodynamical simulations of the evolution of a 0.3Msun main sequence star which launches two perpendicular jets within the envelope of a…
Octo-Tiger's New Hydro Module and Performance Using HPX+CUDA on ORNL's Summit
Patrick Diehl, Gregor Daiß, Dominic Marcello +5
Octo-Tiger is a code for modeling three-dimensional self-gravitating astrophysical fluids. It was particularly designed for the study of dynamical mass transfer between interacting…
Simulating highly-eccentric common envelope jets supernova (CEJSN) impostors
Ron Schreier, Shlomi Hillel, Sagiv Shiber +1
We conduct three-dimensional hydrodynamical simulations of eccentric common envelope jets supernova (CEJSN) impostors, i.e., a neutron star (NS) that crosses through the envelope o…
Performance Measurements within Asynchronous Task-based Runtime Systems: A Double White Dwarf Merger as an Application
Patrick Diehl, Dominic Marcello, Parsa Amini +9
Analyzing performance within asynchronous many-task-based runtime systems is challenging because millions of tasks are launched concurrently. Especially for long-term runs the amou…
Octo-Tiger: A New, 3D Hydrodynamic Code for Stellar Mergers that uses HPX Parallelisation
Dominic C. Marcello, Sagiv Shiber, Orsola De Marco +5
OCTO-TIGER is an astrophysics code to simulate the evolution of self-gravitating and rotat-ing systems of arbitrary geometry based on the fast multipole method, using adaptive mesh…
Companion-launched jets and their effect on the dynamics of common envelope interaction simulations
Sagiv Shiber, Roberto Iaconi, Orsola De Marco +1
We conduct three-dimensional hydrodynamic simulations of the common envelope binary interaction and show that if the companion were to launch jets while interacting with the giant…
The Morphology of the Outflow in the Grazing Envelope Evolution
Sagiv Shiber
We study the grazing envelope evolution (GEE), where a secondary star, which orbits the surface of a giant star, accretes mass from the giant envelope and launches jets. We conduct…
Simulating a binary system that experiences the grazing envelope evolution
Sagiv Shiber, Noam Soker
We conduct three-dimensional hydrodynamical simulations, and show that when a secondary star launches jets while performing spiral-in motion into the envelope of a giant star, the…
Simulating the Onset of Grazing Envelope Evolution of Binary Stars
Sagiv Shiber, Amit Kashi, Noam Soker
We present the first three-dimensional gas-dynamical simulations of the grazing envelope evolution (GEE) of stars, with the goal of exploring the basic flow properties and the role…
Binary interactions with high accretion rates onto main sequence stars
Sagiv Shiber, Ron Schreier, Noam Soker
Energetic outflows from main sequence stars accreting mass at very high rates might account for the powering of some eruptive objects, such as merging main sequence stars, major er…