Zobrazeno 1 - 10
of 174
pro vyhledávání: '"Röpke Friedrich K."'
Autor:
Pakmor, Rüdiger, Pelisoli, Ingrid, Justham, Stephen, Rajamuthukumar, Abinaya S., Röpke, Friedrich K., Schneider, Fabian R. N., de Mink, Selma E., Ohlmann, Sebastian T., Podsiadlowski, Philipp, Fraile, Javier Moran, Vetter, Marco, Andrassy, Robert
Stellar mergers are one important path to highly magnetised stars. Mergers of two low-mass white dwarfs may create up to every third hot subdwarf star. The merging process is usually assumed to dramatically amplify magnetic fields. However, so far on
Externí odkaz:
http://arxiv.org/abs/2407.02566
Autor:
Soultanis, Theodoros, Maltsev, Kiril, Bauswein, Andreas, Chatziioannou, Katerina, Roepke, Friedrich K., Stergioulas, Nikolaos
We present a time-domain model for the gravitational waves emitted by equal-mass binary neutron star merger remnants for a fixed equation of state. We construct a large set of numerical relativity simulations for a single equation of state consistent
Externí odkaz:
http://arxiv.org/abs/2405.09513
We carry out three-dimensional computations of the accretion rate onto an object (of size $R_{\rm sink}$ and mass $m$) as it moves through a uniform medium at a subsonic speed $v_{\infty}$. The object is treated as a fully-absorbing boundary (e.g. a
Externí odkaz:
http://arxiv.org/abs/2402.10341
Autor:
Kozyreva, Alexandra, Moran-Fraile, Javier, Holas, Alexander, Bronner, Vincent A., Roepke, Friedrich K., Pavlyuk, Nikolay, Mironov, Alexey, Tsvetkov, Dmitriy
We consider a binary stellar system, in which a low-mass, of 0.6 Msun, carbon-oxygen white dwarf (WD) mergers with a degenerate helium core of 0.4 Msun of a red giant. We analyse the outcome of a merger within a common envelope (CE). We predict the o
Externí odkaz:
http://arxiv.org/abs/2401.10401
Publikováno v:
ESAIM: Proceedings and Surveys, Vol 58, Pp 27-39 (2017)
In order to perform simulations of low Mach number flow in presence of gravity the technique from [23] is found insufficient as it is unable to cope with the presence of a hydrostatic equilibrium. Instead, a new modification of the diffusion matrix i
Externí odkaz:
https://doaj.org/article/43fc38b932e14432858ccf4b6a82f7a5
Autor:
Wei, Dandan, Schneider, Fabian R. N., Podsiadlowski, Philipp, Laplace, Eva, Roepke, Friedrich K., Vetter, Marco
Publikováno v:
A&A 688, A87 (2024)
Mergers of neutron stars (NSs) and black holes (BHs) are nowadays observed routinely thanks to gravitational-wave (GW) astronomy. In the isolated binary-evolution channel, a common-envelope (CE) phase of a red supergiant (RSG) and a compact object is
Externí odkaz:
http://arxiv.org/abs/2311.07278
Autor:
Collins, Christine E., Sim, Stuart A., Shingles, Luke. J., Gronow, Sabrina, Roepke, Friedrich K., Pakmor, Ruediger, Seitenzahl, Ivo R., Kromer, Markus
The double detonation is a widely discussed mechanism to explain Type Ia supernovae from explosions of sub-Chandrasekhar mass white dwarfs. In this scenario, a helium detonation is ignited in a surface helium shell on a carbon/oxygen white dwarf, whi
Externí odkaz:
http://arxiv.org/abs/2307.08660
SNe Ia play a key role in the fields of astrophysics and cosmology. It is widely accepted that SNe Ia arise from thermonuclear explosions of WDs in binaries. However, there is no consensus on the fundamental aspects of the nature of SN Ia progenitors
Externí odkaz:
http://arxiv.org/abs/2305.13305
Autor:
Moran-Fraile, Javier, Schneider, Fabian R. N., Roepke, Friedrich K., Ohlmann, Sebastian T., Pakmor, Ruediger, Soultanis, Theodoros, Bauswein, Andreas
Publikováno v:
A&A 672, A9 (2023)
We are witnessing the dawn of gravitational wave (GW) astronomy. With currently available detectors, observations are restricted to GW frequencies in the range between ${\sim} 10\,\mathrm{Hz}$ and $10\,\mathrm{kHz}$, which covers the signals from mer
Externí odkaz:
http://arxiv.org/abs/2303.05519
Autor:
Roepke, Friedrich K., De Marco, Orsola
When the primary star in a close binary system evolves into a giant and engulfs its companion, its core and the companion temporarily orbit each other inside a common envelope. Drag forces transfer orbital energy and angular momentum to the envelope
Externí odkaz:
http://arxiv.org/abs/2212.07308