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Deciphering the "Green Monster" in Cassiopeia A: Puncturing and sculpting a heterogeneous circumstellar shell
S. Orlando, H. -T. Janka, D. Milisavljevic +6
JWST observations of Cassiopeia A have revealed the "Green Monster" (GM), a pockmarked region of shocked circumstellar medium (CSM) characterized by circular holes surrounded by br…
3D insights into SN 1987A: ALMA observations compared to hydrodynamical explosion simulations
R. Wesson, M. Gabler, M. Lyons +9
We obtain three-dimensional distributions of CO and SiO molecules from high spatial resolution (0.03--0.06") ALMA observations of SN 1987A at two different epochs. The evolution be…
Origin of holes and rings in the Green Monster of Cassiopeia A: Insights from 3D magnetohydrodynamic simulations
S. Orlando, H. -T. Janka, A. Wongwathanarat +10
[Abridged] Cassiopeia A (Cas A) provides a unique opportunity to study supernova (SN) dynamics and interactions with the circumstellar medium (CSM). Recent JWST observations reveal…
Filamentary Ejecta Network in Cassiopeia~A Reveals Fingerprints of the Supernova Explosion Mechanism
S. Orlando, H. -T. Janka, A. Wongwathanarat +7
[Abridged] Recent JWST observations have revealed an intricate filamentary network of unshocked ejecta in the young supernova remnant (SNR) Cassiopeia A (Cas A), offering new insig…
Unveiling the Physics of Core-Collapse Supernovae with the Line Emission Mapper: Observing Cassiopeia A
S. Orlando, M. Miceli, D. J. Patnaude +12
(Abridged) Core-collapse supernova remnants (SNRs) display complex morphologies and asymmetries, reflecting anisotropies from the explosion and early interactions with the circumst…
End-to-end kilonova models of neutron-star mergers with delayed black-hole formation
Oliver Just, Vimal Vijayan, Zewei Xiong +6
We investigate the nucleosynthesis and kilonova properties of binary neutron-star (NS) merger models which lead to intermediate remnant lifetimes of ~0.1-1seconds until black-hole…
Impact of systematic nuclear uncertainties on composition and decay heat of dynamical and disk ejecta in compact binary mergers
I. Kullmann, S. Goriely, O. Just +2
Theoretically predicted yields of elements created by the rapid neutron capture (r-) process carry potentially large uncertainties associated with incomplete knowledge of nuclear p…
Evidence for past interaction with an asymmetric circumstellar shell in the young SNR Cassiopeia A
S. Orlando, A. Wongwathanarat, H. -T. Janka +8
Observations of the SNR Cassiopeia A (Cas A) show asymmetries in the reverse shock that cannot be explained by models describing a remnant expanding through a spherically symmetric…
Dynamical ejecta of neutron star mergers with nucleonic weak processes I: Nucleosynthesis
I. Kullmann, S. Goriely, O. Just +3
We present a coherent study of the impact of neutrino interactions on the r-process element nucleosynthesis and the heating rate produced by the radioactive elements synthesised in…
Supernova 1987A: 3D Mixing and light curves for explosion models based on binary-merger progenitors
V. P. Utrobin, A. Wongwathanarat, H. -Th. Janka +4
Six binary-merger progenitors of Supernova 1987A (SN 1987A) with properties close to those of the blue supergiant Sanduleak -69 202 are exploded by neutrino heating and evolved unt…
Linking core-collapse supernova explosions to supernova remnants through 3D MHD modeling
S. Orlando, A. Wongwathanarat, H. -T. Janka +5
The structure and morphology of supernova remnants (SNRs) reflect the properties of the parent supernovae (SNe) and the characteristics of the inhomogeneous environments through wh…
Properties of gamma-ray decay lines in 3D core-collapse supernova models, with application to SN 1987A and Cas A
A. Jerkstrand, A. Wongwathanarat, H. -T. Janka +8
Comparison of theoretical line profiles to observations provides important tests for supernova explosion models. We study the shapes of radioactive decay lines predicted by current…
Gravitational waves from three-dimensional core-collapse supernova models: The impact of moderate progenitor rotation
H. Andresen, E. Müller, H. -Th. Janka +3
We present predictions for the gravitational-wave (GW) emission of three-dimensional supernova (SN) simulations performed for a 15 solar-mass progenitor with the Prometheus-Vertex…
Muon Creation in Supernova Matter Facilitates Neutrino-driven Explosions
R. Bollig, H. -Th. Janka, A. Lohs +3
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 abundance compared to…
Three-dimensional neutrino-driven supernovae: Neutron star kicks, spins, and asymmetric ejection of nucleosynthesis products
A. Wongwathanarat, H. -Th. Janka, E. Mueller
We present 3D simulations of supernova (SN) explosions of nonrotating stars, triggered by the neutrino-heating mechanism with a suitable choice of the core-neutrino luminosity. Our…
Polytropic neutron star - black hole merger simulations with a Paczynski-Wiita potential
M. Ruffert, H. -Th. Janka
Context: Mergers of neutron stars (NS) and black holes (BH) are among the strongest sources of gravitational waves and are potential central engines for short gamma-ray bursts. Aim…