Zobrazeno 1 - 10
of 122
pro vyhledávání: '"WOODWARD, PAUL R."'
A few percent of red giants are enriched in Lithium with $A(\mathrm{Li}) > 1.5$. Their evolutionary status has remained uncertain because these Li-rich giants can be placed both on the red-giant branch (RGB) near the bump luminosity and in the red cl
Externí odkaz:
http://arxiv.org/abs/2309.04634
The inner structure of core-helium burning (CHeB) stars remains uncertain due to the yet unknown nature of mixing at the boundary of their cores. Large convective cores beyond a bare Schwarzschild model are favoured both from theoretical arguments an
Externí odkaz:
http://arxiv.org/abs/2308.10865
Autor:
Blouin, Simon, Mao, Huaqing, Woods, Tyrone E., Denissenkov, Pavel, Woodward, Paul R., Herwig, Falk
Supermassive stars are Population III stars with masses exceeding $10^4\,M_{\odot}$ that could be the progenitors of the first supermassive black holes. Their interiors are in a regime where radiation pressure dominates the equation of state. In this
Externí odkaz:
http://arxiv.org/abs/2303.10115
Autor:
Blouin, Simon, Mao, Huaqing, Herwig, Falk, Denissenkov, Pavel, Woodward, Paul R., Thompson, William R.
We present the first 3D hydrodynamics simulations of the excitation and propagation of internal gravity waves (IGWs) in the radiative interiors of low-mass stars on the red giant branch (RGB). We use the PPMstar explicit gas dynamics code to simulate
Externí odkaz:
http://arxiv.org/abs/2303.07332
Autor:
Thompson, William, Herwig, Falk, Woodward, Paul R., Mao, Huaqing, Denissenkov, Pavel, Bowman, Dominic M., Blouin, Simon
Recent photometric observations of massive stars have identified a low-frequency power excess which appears as stochastic low-frequency variability in light curve observations. We present the oscillation properties of high resolution hydrodynamic sim
Externí odkaz:
http://arxiv.org/abs/2303.06125
Autor:
Herwig, Falk, Woodward, Paul R., Mao, Huaqing, Thompson, William R., Denissenkov, Pavel, Lau, Josh, Blouin, Simon, Andrassy, Robert, Paul, Adam
We performed 3D hydrodynamic simulations of the inner $\approx 50\%$ radial extent of a $25\ \mathrm{M_\odot}$ star in the early phase of the main sequence and investigate core convection and internal gravity waves in the core-envelope boundary regio
Externí odkaz:
http://arxiv.org/abs/2303.05495
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The special computational challenges of simulating 3-D hydrodynamics in deep stellar interiors are discussed, and numerical algorithmic responses described. Results of recent simulations carried out at scale on the NSF's Blue Waters machine at the Un
Externí odkaz:
http://arxiv.org/abs/1810.13416
Akademický článek
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We performed 3-D simulations of proton-rich material entrainment into \czw-rich He-shell flash convection and the subsequent H-ingestion flash that took place in the post-AGB star Sakurai's object. Observations of the transient nature and anomalous a
Externí odkaz:
http://arxiv.org/abs/1310.4584