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Energy Dependence of Flavor Instabilities Stemming from Crossings in the Neutrino Flavor Lepton Number Angular Distribution
Pedro Dedin Neto, Irene Tamborra, Shashank Shalgar
In core-collapse supernovae and neutron star mergers, the neutrino density is so large that neutrino-neutrino refraction can lead to flavor conversion, if a zero-crossing is presen…
Constraints on neutrino natal kicks from black-hole binary VFTS 243
Alejandro Vigna-Gómez, Reinhold Willcox, Irene Tamborra +8
The recently reported observation of VFTS 243 is the first example of a massive black-hole binary system with negligible binary interaction following black-hole formation. The blac…
Transients stemming from collapsing massive stars: The missing pieces to advance joint observations of photons and high-energy neutrinos
Ersilia Guarini, Irene Tamborra, Raffaella Margutti +1
Collapsing massive stars lead to a broad range of astrophysical transients, whose multi-wavelength emission is powered by a variety of processes including radioactive decay, activi…
Subphotospheric emission from short gamma-ray bursts: Protons mold the multi-messenger signals
Annika Rudolph, Irene Tamborra, Ore Gottlieb
The origin of the observed Band-like photon spectrum in short gamma-ray bursts (sGRBs) is a long-standing mystery. We carry out the first general relativistic magnetohydrodynamic s…
Optically Informed Searches of High-Energy Neutrinos from Interaction-Powered Supernovae
Tetyana Pitik, Irene Tamborra, Massimiliano Lincetto +1
The interaction between the ejecta of supernovae (SNe) of Type IIn and a dense circumstellar medium (CSM) can efficiently generate thermal UV/optical radiation and lead to the emis…
Do Neutrinos Become Flavor Unstable Due to Collisions with Matter in the Supernova Decoupling Region?
Shashank Shalgar, Irene Tamborra
In core-collapse supernovae, the neutrino density is so large that neutrino flavor instabilities, leading to flavor conversion, can be triggered by the forward scattering of neutri…
Do we have enough evidence to invalidate the mean-field approximation adopted to model collective neutrino oscillations?
Shashank Shalgar, Irene Tamborra
Recent body of work points out that the mean-field approximation, widely employed to mimic the neutrino field within a neutrino-dense source, might give different results in terms…
Fast Neutrino Flavor Conversions can Help and Hinder Neutrino-Driven Explosions
Jakob Ehring, Sajad Abbar, Hans-Thomas Janka +2
We present the first simulations of core-collapse supernovae in axial symmetry with feedback from fast neutrino flavor conversion (FFC). Our schematic treatment of FFCs assumes ins…
Multimessenger Constraints on Radiatively Decaying Axions from GW170817
Melissa Diamond, Damiano F. G. Fiorillo, Gustavo Marques-Tavares +2
The metastable hypermassive neutron star produced in the coalescence of two neutron stars can copiously produce axions that radiatively decay into ~MeV photons. T…
Multi-messenger observations of core-collapse supernovae: Exploiting the standing accretion shock instability
Marco Drago, Haakon Andresen, Irene Di Palma +2
The gravitational wave (GW) and neutrino signals from core-collapse supernovae (CCSNe) are expected to carry pronounced imprints of the standing accretion shock instability (SASI).…
Gamma-rays and neutrinos from supernovae of Type Ib/c with late time emission
Prantik Sarmah, Sovan Chakraborty, Irene Tamborra +1
Observations of some supernovae (SNe), such as SN 2014C, in the X-ray and radio wavebands revealed a rebrightening over a timescale of about a year since their detection. Such a di…
Fast Neutrino Flavor Conversion in Core-Collapse Supernovae: A Parametric Study in 1D Models
Jakob Ehring, Sajad Abbar, Hans-Thomas Janka +2
We explore the impact of small-scale flavor conversions of neutrinos, the so-called fast flavor conversions (FFCs), on the dynamical evolution and neutrino emission of core-collaps…
Probing gamma-ray bursts observed at very high energies through their afterglow
Ersilia Guarini, Irene Tamborra, Damien Bégué +1
A growing number of gamma-ray burst (GRB) afterglows is observed at very-high energies (VHE, GeV). Yet, our understanding of the mechanism powering the VHE emission r…