Search Results - "Janka, H."
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SYSTEMATICS OF DYNAMICAL MASS EJECTION, NUCLEOSYNTHESIS, AND RADIOACTIVELY POWERED ELECTROMAGNETIC SIGNALS FROM NEUTRON-STAR MERGERS
Published in The Astrophysical journal (10-08-2013)“…We investigate systematically the dynamical mass ejection, r-process nucleosynthesis, and properties of electromagnetic counterparts of neutron-star (NS)…”
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The Explosion of Helium Stars Evolved with Mass Loss
Published in The Astrophysical journal (10-02-2020)“…Light curves, explosion energies, and remnant masses are calculated for a grid of supernovae resulting from massive helium stars that have been evolved…”
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Formation of Double Neutron Star Systems
Published in The Astrophysical journal (10-09-2017)“…Double neutron star (DNS) systems represent extreme physical objects and the endpoint of an exotic journey of stellar evolution and binary interactions. Large…”
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Non-radial instabilities and progenitor asphericities in core-collapse supernovae
Published in Monthly notices of the Royal Astronomical Society (11-04-2015)“…Since core-collapse supernova simulations still struggle to produce robust neutrino-driven explosions in 3D, it has been proposed that asphericities caused by…”
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CORE-COLLAPSE SUPERNOVAE FROM 9 TO 120 SOLAR MASSES BASED ON NEUTRINO-POWERED EXPLOSIONS
Published in The Astrophysical journal (10-04-2016)“…ABSTRACT Nucleosynthesis, light curves, explosion energies, and remnant masses are calculated for a grid of supernovae (SNe) resulting from massive stars with…”
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The Birth Function for Black Holes and Neutron Stars in Close Binaries
Published in The Astrophysical journal (01-06-2020)“…The mass function for black holes and neutron stars at birth is explored for mass-losing helium stars. These should resemble, more closely than similar studies…”
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Three-dimensional Core-collapse Supernova Simulations with Multidimensional Neutrino Transport Compared to the Ray-by-ray-plus Approximation
Published in The Astrophysical journal (01-03-2019)“…Self-consistent, time-dependent supernova (SN) simulations in three spatial dimensions (3D) are conducted with the Aenus-Alcar code, comparing, for the first…”
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A new multidimensional, energy-dependent two-moment transport code for neutrino-hydrodynamics
Published in Monthly notices of the Royal Astronomical Society (11-11-2015)“…We present the new code alcar developed to model multidimensional, multienergy-group neutrino transport in the context of supernovae and neutron-star mergers…”
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Measuring neutron-star properties via gravitational waves from neutron-star mergers
Published in Physical review letters (05-01-2012)“…We demonstrate by a large set of merger simulations for symmetric binary neutron stars (NSs) that there is a tight correlation between the frequency peak of…”
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A TWO-PARAMETER CRITERION FOR CLASSIFYING THE EXPLODABILITY OF MASSIVE STARS BY THE NEUTRINO-DRIVEN MECHANISM
Published in The Astrophysical journal (20-02-2016)“…ABSTRACT Thus far, judging the fate of a massive star (either a neutron star [NS] or a black hole) solely by its structure prior to core collapse has been…”
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Gravitational wave signals from 3D neutrino hydrodynamics simulations of core-collapse supernovae
Published in Monthly notices of the Royal Astronomical Society (01-06-2017)“…Abstract We present gravitational wave (GW) signal predictions from four 3D multigroup neutrino hydrodynamics simulations of core-collapse supernovae of…”
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Delayed Neutrino-Driven Supernova Explosions Aided by the Standing Accretion-Shock Instability
Published in The Astrophysical journal (20-03-2009)“…We present two-dimensional hydrodynamic simulations of stellar core collapse and develop the framework for a detailed analysis of the energetic aspects of…”
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Effects of LESA in Three-dimensional Supernova Simulations with Multidimensional and Ray-by-ray-plus Neutrino Transport
Published in The Astrophysical journal (10-08-2019)“…A set of eight self-consistent, time-dependent supernova (SN) simulations in three spatial dimensions (3D) for 9 and 20 M progenitors is evaluated for the…”
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Impact of weak interactions of free nucleons on the r-process in dynamical ejecta from neutron star mergers
Published in Monthly notices of the Royal Astronomical Society (01-10-2015)“…We investigate β-interactions of free nucleons and their impact on the electron fraction (Y e) and r-process nucleosynthesis in ejecta characteristic of binary…”
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Muon Creation in Supernova Matter Facilitates Neutrino-Driven Explosions
Published in Physical review letters (15-12-2017)“…Muons can be created in nascent neutron stars (NSs) due to the high electron chemical potentials and the high temperatures. Because of their relatively lower…”
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Instability of a Stalled Accretion Shock: Evidence for the Advective-Acoustic Cycle
Published in The Astrophysical journal (10-01-2007)“…We analyze the linear stability of a stalled accretion shock in a perfect gas with a parameterized cooling function 8P super(b-a)P super(a) 8 r super(b-a) P…”
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Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers
Published in Monthly notices of the Royal Astronomical Society (21-03-2015)“…We present the first comprehensive study of r-process element nucleosynthesis in the ejecta of compact binary mergers (CBMs) and their relic black hole…”
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New fission fragment distributions and r-process origin of the rare-earth elements
Published in Physical review letters (13-12-2013)“…Neutron star (NS) merger ejecta offer a viable site for the production of heavy r-process elements with nuclear mass numbers A≳140. The crucial role of fission…”
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Magnetic field amplification and magnetically supported explosions of collapsing, non-rotating stellar cores
Published in Monthly notices of the Royal Astronomical Society (11-12-2014)“…We study the amplification of magnetic fields in the collapse and the post-bounce evolution of the core of a non-rotating star of 15 M⊙ in axisymmetry. To this…”
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Gravitational waves from 3D core-collapse supernova models: The impact of moderate progenitor rotation
Published in Monthly notices of the Royal Astronomical Society (01-06-2019)Get full text
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