Evolutionary models for the remnant of the merger of two carbon-oxygen core white dwarfs
J Schwab - The Astrophysical Journal, 2021 - iopscience.iop.org
We construct evolutionary models of the remnant of the merger of two carbon-oxygen (CO)
core white dwarfs (WDs). With total masses in the range 1–2 M⊙, these remnants may either …
core white dwarfs (WDs). With total masses in the range 1–2 M⊙, these remnants may either …
Hydrodynamic simulations of white dwarf–white dwarf mergers and the origin of R Coronae Borealis stars
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 …
simulations using the new and improved adaptive mesh refinement code octo-tiger. We …
octo-tiger: a new, 3D hydrodynamic code for stellar mergers that uses hpx parallelization
ABSTRACT octo-tiger is an astrophysics code to simulate the evolution of self-gravitating
and rotating systems of arbitrary geometry based on the fast multipole method, using …
and rotating systems of arbitrary geometry based on the fast multipole method, using …
Evolutionary models for R Coronae Borealis stars
J Schwab - The Astrophysical Journal, 2019 - iopscience.iop.org
Abstract We use Modules for Experiments in Stellar Astrophysics (MESA) to construct stellar
evolution models that reach a hydrogen-deficient, carbon-rich giant phase like the R …
evolution models that reach a hydrogen-deficient, carbon-rich giant phase like the R …
Evolving R Coronae Borealis stars with mesa
ABSTRACT The R Coronae Borealis (RCB) stars are rare hydrogen-deficient, carbon-rich
supergiants. They undergo extreme, irregular declines in brightness of many magnitudes …
supergiants. They undergo extreme, irregular declines in brightness of many magnitudes …
R Coronae Borealis Star evolution: simulating 3D merger events to 1D stellar evolution including large-scale nucleosynthesis
B Munson, E Chatzopoulos, J Frank… - The Astrophysical …, 2021 - iopscience.iop.org
Abstract R Coronae Borealis (RCB) stars are rare hydrogen-deficient carbon-rich variable
supergiants thought to be the result of dynamically unstable white dwarf mergers. We …
supergiants thought to be the result of dynamically unstable white dwarf mergers. We …
Stellar mergers with HPX-Kokkos and SYCL: methods of using an asynchronous many-task runtime system with SYCL
Ranging from NVIDIA GPUs to AMD GPUs and Intel GPUs: Given the heterogeneity of
available accelerator cards within current supercomputers, portability is a key aspect for …
available accelerator cards within current supercomputers, portability is a key aspect for …
From task-based gpu work aggregation to stellar mergers: Turning fine-grained cpu tasks into portable gpu kernels
Meeting both scalability and performance portability requirements is a challenge for any
HPC application, especially for adaptively refined ones. In Octo-Tiger, an astrophysics …
HPC application, especially for adaptively refined ones. In Octo-Tiger, an astrophysics …
Modelling R Coronae Borealis stars: effects of He-burning shell temperature and metallicity
CL Crawford, GC Clayton, B Munson… - Monthly Notices of …, 2020 - academic.oup.com
ABSTRACT The R Coronae Borealis (RCB) stars are extremely hydrogen-deficient carbon
stars that produce large amounts of dust, causing sudden deep declines in brightness. They …
stars that produce large amounts of dust, causing sudden deep declines in brightness. They …
Improved Models of R Coronae Borealis Stars
B Munson, E Chatzopoulos… - The Astrophysical …, 2022 - iopscience.iop.org
We present an improved numerical method to model subsolar He+ CO-WD merger
progenitors of R Corona Borealis stars that builds on our previous work. These …
progenitors of R Corona Borealis stars that builds on our previous work. These …