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#multimessenger

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IRAP

[#MultiMessenger Astrophysics] The very first colloquium of the #astrophysics Center for Multimessenger Studies in Europe (#ACME) is being held this week in Toulouse. It brings together numerous specialists in #GRB, #kilonovae, compact #binaries and more. These are the main transient and periodic sources of gravitational waves that travel through our #Universe, and which numerous experimental devices are attempting to intercept - from both ground and space.

More info: acme-grav-waves.sciencesconf.o

First Center for Multimessenger Studies in Europe workshop
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MPI for Gravitational Physics

An interdisciplinary research team, including scientists from @mpi_grav in Potsdam, has developed an innovative machine learning method. It makes it possible to precisely analyze gravitational waves from colliding neutron stars 💥 in a fraction of a second. ⏱️

The new algorithm DINGO-BNS could revolutionize multi-messenger astronomy. 🔭

ℹ️ aei.mpg.de/1222753/neural-netw

📄 nature.com/articles/s41586-025

Artist's impression of merging neutron stars and the gravitational waves they emit. Two dark blue spheres, almost touching, surrounded by bluish wave structures against a dark blue starry background.
#astrophysics#GravitationalWaves#astronomy
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MPI for Gravitational Physics

Ein interdisziplinäres Team, darunter Forschende vom @mpi_grav in Potsdam, hat eine innovative maschinelle Lernmethode entwickelt. Sie ermöglicht es, Gravitationswellen von kollidierenden Neutronensternen 💥 in Sekundenbruchteilen ⏱️ präzise zu analysieren.

Der neue Algorithmus DINGO-BNS könnte die Multi-Messenger-Astronomie revolutionieren. 🔭

ℹ️ aei.mpg.de/1222972/neural-netw

📄 nature.com/articles/s41586-025

Künstlerische Darstellung verschmelzender Neutronensterne und der abgestrahlten Gravitationswellen. Zwei dunkelblaue Kugeln, die sich fast berühren, umgeben von bläulichen Wellenwirbeln vor einem dunkelblauen Sternenhintergrund.
#Astrophysik#Gravitationswellen#Astronomie
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Daniel Fischer

Diffusive shock acceleration at #EeV and associated #multimessenger flux from ultra-fast outflows driven by #ActiveGalacticNuclei: arxiv.org/abs/2301.13689 -> Messages from UFOs: astrobites.org/2023/03/23/mess

arXiv.orgDiffusive shock acceleration at EeV and associated multimessenger flux from ultra-fast outflows driven by Active Galactic NucleiActive galactic nuclei (AGNi) can launch and sustain powerful winds featuring mildly relativistic velocity and wide opening angle. Such winds, known as ultra-fast outflows (UFOs), can develop a bubble structure characterized by a forward shock expanding in the host galaxy and a wind termination shock separating the fast cool wind from the hot shocked wind. In this work we explore whether diffusive shock acceleration can take place efficiently at the wind termination shock of UFOs. We calculate the spectrum of accelerated particles and find that protons can be energized up to the EeV range promoting UFOs to promising candidates for accelerating ultra-high energy cosmic rays (UHECRs). We also compute the associated gamma-ray and neutrino fluxes and compare them with available data in the literature. We observe that high-energy (HE) neutrinos are efficiently produced up to hundreds of PeV while the associated gamma rays are efficiently absorbed beyond a few tens of GeV. By assuming a typical source density of non-jetted AGNi we expect that UFO could play a dominant role as diffuse sources of UHECRs and HE neutrinos. We finally apply our model to the recently observed NGC1068 and we find out that an obscured UFO could provide a sizeable contribution to the observed gamma-ray flux while only contributing up to $\sim 10\%$ to the associated neutrino flux.
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