Zobrazeno 1 - 10
of 210
pro vyhledávání: '"Roepke, F. K."'
We present a freeze-out approach to the formation of heavy elements in expanding nuclear matter. Applying concepts used in the description of heavy-ion collisions or ternary fission, we determine the abundances of heavy elements taking into account i
Externí odkaz:
http://arxiv.org/abs/2411.00535
Autor:
Vetter, M., Roepke, F. K., Schneider, F. R. N., Pakmor, R., Ohlmann, S. T., Lau, M. Y. M., Andrassy, R.
Three-dimensional simulations usually fail to cover the entire dynamical common-envelope phase of gravitational wave progenitor systems due to the vast range of spatial and temporal scales involved. We investigated the common-envelope interactions of
Externí odkaz:
http://arxiv.org/abs/2410.07841
Autor:
Callan, F. P., Collins, C. E., Sim, S. A., Shingles, L. J., Pakmor, R., Srivastav, S., Pollin, J. M., Gronow, S., Roepke, F. K., Seitenzahl, I. R.
In the double detonation scenario the ignition of a surface He detonation on a sub-Chandrasekhar mass white dwarf leads to a secondary core detonation. Double detonation models have shown promise for explaining Type Ia supernovae (SNe Ia) with a vari
Externí odkaz:
http://arxiv.org/abs/2408.03048
Autor:
Pollin, J. M., Sim, S. A., Pakmor, R., Callan, F. P., Collins, C. E., Shingles, L. J., Roepke, F. K., Srivastav, S.
A leading model for Type Ia supernovae involves the double-detonation of a sub-Chandrasekhar mass white dwarf. Double-detonations arise when a surface helium shell detonation generates shockwaves that trigger a core detonation; this mechanism may be
Externí odkaz:
http://arxiv.org/abs/2408.00917
Autor:
Callan, F. P., Sim, S. A., Collins, C. E., Shingles, L. J., Lach, F., Roepke, F. K., Pakmor, R., Kromer, M., Srivastav, S.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 530, Issue 2, May 2024, Pages 1457 to 1473
Type Iax supernovae (SNe Iax) are proposed to arise from deflagrations of Chandrasekhar mass white dwarfs (WDs). Previous deflagration simulations have achieved good agreement with the light curves and spectra of intermediate-luminosity and bright SN
Externí odkaz:
http://arxiv.org/abs/2403.15084
Performance of high-order Godunov-type methods in simulations of astrophysical low Mach number flows
Publikováno v:
A&A 686, A34 (2024)
High-order Godunov methods for gas dynamics have become a standard tool for simulating different classes of astrophysical flows. Their accuracy is mostly determined by the spatial interpolant used to reconstruct the pair of Riemann states at cell int
Externí odkaz:
http://arxiv.org/abs/2402.16706
Autor:
Pakmor, R., Seitenzahl, I. R., Ruiter, A. J., Sim, S. A., Roepke, F. K., Taubenberger, S., Bieri, R., Blondin, S.
Publikováno v:
A&A 686, A227 (2024)
Theoretical and observational approaches to settling the important questions surrounding the progenitor systems and the explosion mechanism of normal Type Ia supernovae have thus far failed. With its unique capability to obtain continuous spectra thr
Externí odkaz:
http://arxiv.org/abs/2402.11010
The common-envelope (CE) phase is a crucial stage in binary star evolution because the orbital separation can shrink drastically while ejecting the envelope of a giant star. Three-dimensional (3D) hydrodynamic simulations of CE evolution are indispen
Externí odkaz:
http://arxiv.org/abs/2311.06332
We have computed a three-dimensional hydrodynamic simulation of the merger between a massive ($0.4\,M_\odot$) helium white dwarf (He WD) and a low-mass ($0.6\,M_\odot$) carbon-oxygen white dwarf (CO WD). Despite the low mass of the primary, the merge
Externí odkaz:
http://arxiv.org/abs/2310.19669
Autor:
Moran-Fraile, J., Roepke, F. K., Pakmor, R., Aloy, M. A., Ohlmann, S. T., Schneider, F. R. N., Leidi, G.
Publikováno v:
A&A 681, A41 (2024)
The merger of a white dwarf (WD) and a neutron star (NS) is a relatively common event that will produce an observable electromagnetic signal. Furthermore, the compactness of these stellar objects makes them an interesting candidate for gravitational
Externí odkaz:
http://arxiv.org/abs/2310.08623