Zobrazeno 1 - 10
of 88
pro vyhledávání: '"Motl, Patrick M."'
Autor:
Shiber, Sagiv, De Marco, Orsola, Motl, Patrick M., Munson, Bradley, Marcello, Dominic C., Frank, Juhan, Diehl, Patrick, Clayton, Geoffrey C., Skinner, Bennett N., Kaiser, Hartmut, Daiss, Gregor, Pfluger, Dirk, Staff, Jan E.
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 the orbital evolution of DWD systems of mass ratio q=0.7 for tens of orb
Externí odkaz:
http://arxiv.org/abs/2404.06864
Autor:
Marcello, Dominic C., Shiber, Sagiv, De Marco, Orsola, Frank, Juhan, Clayton, Geoffrey C., Motl, Patrick M., Diehl, Patrick, Kaiser, Hartmut
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 refinement. OCTO-TIGER is currently optimised to simulate the merger
Externí odkaz:
http://arxiv.org/abs/2101.08226
We present the first self-consistent, three dimensional study of hydrodynamic simulations of mass transfer in binary systems with bipolytropic (composite polytropic) components. In certain systems, such as contact binaries or during the common envelo
Externí odkaz:
http://arxiv.org/abs/1809.04884
Autor:
Staff, Jan E., Wiggins, Brandon, Marcello, Dominic, Motl, Patrick M., Even, Wesley, Fryer, Christopher L., Raskin, Cody, Clayton, Geoffrey C., Frank, Juhan
We present the results of an investigation of the dredge-up and mixing during the merger of two white dwarfs with different chemical compositions by conducting hydrodynamic simulations of binary mergers for three representative mass ratios. In all th
Externí odkaz:
http://arxiv.org/abs/1806.00337
We demonstrate that rapidly rotating bipolytropic (composite polytropic) stars and toroidal disks can be obtained using Hachisu's self consistent field technique. The core and the envelope in such a structure can have different polytropic indices and
Externí odkaz:
http://arxiv.org/abs/1709.00039
Autor:
Motl, Patrick M, Frank, Juhan, Staff, Jan, Clayton, Geoffrey C, Fryer, Christopher L, Even, Wesley, Diehl, Steven, Tohline, Joel E
Currently there is great interest in the outcomes and astrophysical implications of mergers of double degenerate binaries. In a commonly adopted approximation, the components of such binaries are represented by polytropes with an index n=3/2. We pres
Externí odkaz:
http://arxiv.org/abs/1702.03562
Autor:
Staff, Jan. E., Menon, Athira, Herwig, Falk, Even, Wesley, Fryer, Chris L., Motl, Patrick M., Geballe, Tom, Pignatari, Marco, Clayton, Geoffrey C., Tohline, Joel E.
A leading formation scenario for R Coronae Borealis (RCB) stars invokes the merger of degenerate He and CO white dwarfs (WD) in a binary. The observed ratio of 16O/18O for RCB stars is in the range of 0.3-20 much smaller than the solar value of ~500.
Externí odkaz:
http://arxiv.org/abs/1208.0732
Autor:
Neilsen, David, Lehner, Luis, Palenzuela, Carlos, Hirschmann, Eric W., Liebling, Steven L., Motl, Patrick M., Garrett, T.
Publikováno v:
Proceedings of the National Academy of Sciences, Vol. 108, no. 31, pp. 12641-12646 (August 2011)
The extraction of rotational energy from a spinning black hole via the Blandford-Znajek mechanism has long been understood as an important component in models to explain energetic jets from compact astrophysical sources. Here we show more generally t
Externí odkaz:
http://arxiv.org/abs/1012.5661
Autor:
Chawla, Sarvnipun, Anderson, Matthew, Besselman, Michael, Lehner, Luis, Liebling, Steven L., Motl, Patrick M., Neilsen, David
Publikováno v:
Phys.Rev.Lett.105:111101,2010
We investigate the merger of a neutron star (of compaction ratio $0.1$) in orbit about a spinning black hole in full general relativity with a mass ratio of $5:1$, allowing for the star to have an initial magnetization of $10^{12} {\rm Gauss}$. We pr
Externí odkaz:
http://arxiv.org/abs/1006.2839
Autor:
Megevand, Miguel, Anderson, Matthew, Frank, Juhan, Hirschmann, Eric W., Lehner, Luis, Liebling, Steven L., Motl, Patrick M., Neilsen, David
Publikováno v:
Phys.Rev.D80:024012,2009
The merger process of a binary black hole system can have a strong impact on a circumbinary disk. In the present work we study the effect of both central mass reduction (due to the energy loss through gravitational waves) and a possible black hole re
Externí odkaz:
http://arxiv.org/abs/0905.3390