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Binary Neutron Star Mergers as Potential Sources for Ultra-High-Energy Cosmic Rays and High-Energy Neutrinos
Gang Guo, Yong-Zhong Qian, Meng-Ru Wu
Recent studies suggest that the most energetic cosmic rays, exceeding 100 EeV, may primarily consist of -process nuclei. This highlights binary neutron star mergers and collapsa…
Neutrino Oscillations in Core-Collapse Supernovae and Neutron Star Mergers
Lucas Johns, Sherwood Richers, Meng-Ru Wu
Accurate neutrino transport is crucial for reliably modeling explosive astrophysical events like core-collapse supernovae (CCSNe) and neutron star mergers (NSMs). However, in these…
Effects of Annihilation with Low-Energy Neutrinos on High-Energy Neutrinos from Binary Neutron Star Mergers and Rare Core-Collapse Supernovae
Gang Guo, Yong-Zhong Qian, Meng-Ru Wu
We explore the possibility that high-energy (HE) neutrinos produced from choked jets can be annihilated with low-energy (LE) neutrinos emitted from the accretion disk around a blac…
Neutrinos and nucleosynthesis of elements
Tobias Fischer, Gang Guo, Karlheinz Langanke +3
Neutrinos are known to play important roles in many astrophysical scenarios from the early period of the big bang to current stellar evolution being a unique messenger of the fusio…
Evaluating approximate asymptotic distributions for fast neutrino flavor conversions in a periodic 1D box
Zewei Xiong, Meng-Ru Wu, Sajad Abbar +3
The fast flavor conversions (FFCs) of neutrinos generally exist in core-collapse supernovae and binary neutron-star merger remnants, and can significantly change the flavor composi…
R-process beta-decay neutrino flux from binary neutron star mergers and collapsars
Yu An, Meng-Ru Wu, Gang Guo +3
This study investigates the antineutrinos production by -decay of -process nuclei in two astrophysical sites that are capable of producing gamma-ray bursts (GRBs): binary neu…
Signature of Collapsars as Sources for High-energy Neutrinos and -process Nuclei
Gang Guo, Yong-Zhong Qian, Meng-Ru Wu
If collapsars are sources for both high-energy (HE) neutrinos and -process nuclei, the profuse low-energy antineutrinos from -decay of the newly-synthesized nuclei can annihi…
Evolution of collisional neutrino flavor instabilities in spherically symmetric supernova models
Zewei Xiong, Meng-Ru Wu, Gabriel Martínez-Pinedo +4
We implement a multi-group and discrete-ordinate neutrino transport model in spherical symmetry which allows to simulate collective neutrino oscillations by including realistic col…
Resonant Production of Light Sterile Neutrinos in Compact Binary Merger Remnants
Garðar Sigurðarson, Irene Tamborra, Meng-Ru Wu
The existence of eV-mass sterile neutrinos is not ruled out because of persistent experimental anomalies. Upcoming multi-messenger detections of neutron-star merger remnants could…
The Production of Actinides in Neutron Star Mergers
Meng-Ru Wu, Projjwal Banerjee
Although the multimessenger detection of the neutron star merger event GW170817 confirmed that mergers are promising sites producing the majority of nature's heavy elements via the…
Code Comparison for Fast Flavor Instability Simulation
Sherwood Richers, Huaiyu Duan, Meng-Ru Wu +5
The fast flavor instability (FFI) is expected to be ubiquitous in core-collapse supernovae and neutron star mergers. It rapidly shuffles neutrino flavor in a way that could impact…
Fast Neutrino Conversion in Hydrodynamic Simulations of Neutrino-Cooled Accretion Disks
Oliver Just, Sajad Abbar, Meng-Ru Wu +3
The outflows from neutrino-cooled black-hole (BH) accretion disks formed in neutron-star mergers or cores of collapsing stars are expected to be neutron-rich enough to explain a la…
Compact Dark Objects in Neutron Star Mergers
Andreas Bauswein, Gang Guo, Jr-Hua Lien +2
We estimate the long-lasting gravitational wave (GW) emission of compact dark objects following a binary neutron-star (NS) merger. We consider compact dark objects, which initially…
Fast neutrino flavor conversion, ejecta properties, and nucleosynthesis in newly-formed hypermassive remnants of neutron-star mergers
Manu George, Meng-Ru Wu, Irene Tamborra +2
Neutrinos emitted in the coalescence of two neutron stars affect the dynamics of the outflow ejecta and the nucleosynthesis of heavy elements. In this work, we analyze the neutrino…
Elastic and Inelastic Scattering of Cosmic-Rays on Sub-GeV Dark Matter
Gang Guo, Yue-Lin Sming Tsai, Meng-Ru Wu +1
We revisit the signatures from collisions of cosmic-rays on sub-GeV dark matter (DM) in the Milky Way. In addition to the upscattered DM component that can be probed by existing DM…
Lifting the core-collapse supernova bounds on keV-mass sterile neutrinos
Anna M. Suliga, Irene Tamborra, Meng-Ru Wu
We explore the energy and entropy transport as well as the lepton number variation induced from the mixing between electron and sterile neutrinos with keV mass in the supernova cor…
Probing Cosmic-Ray Accelerated Light Dark Matter with IceCube
Gang Guo, Yue-Lin Sming Tsai, Meng-Ru Wu
The direct detection of particle dark matter through its scattering with nucleons is of fundamental importance to understand the nature of DM. In this work, we propose that the hig…
Core-collapse Supernova Explosions Driven by the Hadron-quark Phase Transition as a Rare -process Site
Tobias Fischer, Meng-Ru Wu, Benjamin Wehmeyer +3
Supernova explosions of massive stars are one of the primary sites for the production of the elements in the universe. Up to now, stars with zero-age main-sequence masses in the ra…
Neutrino Production Associated with Late Bumps in Gamma-Ray Bursts and Potential Contribution to Diffuse Flux at IceCube
Gang Guo, Yong-Zhong Qian, Meng-Ru Wu
IceCube has detected many TeV--PeV neutrinos, but their astrophysical origins remain largely unknown. Motivated by the observed late-time X-ray/optical bumps in some gamma-ray burs…
Tau lepton asymmetry by sterile neutrino emission -- Moving beyond one-zone supernova models
Anna M. Suliga, Irene Tamborra, Meng-Ru Wu
The mixing of active neutrinos with their sterile counterparts with keV mass is known to have a potentially major impact on the energy loss from the supernova core. By relying on a…
Multimessenger Asteroseismology of Core-Collapse Supernovae
John Ryan Westernacher-Schneider, Evan O'Connor, Erin O'Sullivan +4
We investigate correlated gravitational wave and neutrino signals from rotating core-collapse supernovae with simulations. Using an improved mode identification procedure based on…
Finding the remnants of the Milky Way's last neutron star mergers
Meng-Ru Wu, Projjwal Banerjee, Brian D. Metzger +6
The discovery of a binary neutron star merger (NSM) through both its gravitational wave and electromagnetic emission has revealed these events to be key sites of r-process nucleosy…
Active-sterile Neutrino Oscillations in Neutrino-driven Winds: Implications for Nucleosynthesis
Zewei Xiong, Meng-Ru Wu, Yong-Zhong Qian
A protoneutron star produced in a core-collapse supernova (CCSN) drives a wind by its intense neutrino emission. We implement active-sterile neutrino oscillations in a steady-state…
Fingerprints of heavy element nucleosynthesis in the late-time lightcurves of kilonovae
Meng-Ru Wu, Jennifer Barnes, Gabriel Martinez-Pinedo +1
The kilonova emission observed following the binary neutron star merger event GW170817 provided the first direct evidence for the synthesis of heavy nuclei through the r-process. T…