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Multi-Messenger Astrophysics
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Multi-Messenger Astrophysics
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Multi-messenger astrophysics, a long-anticipated extension to traditional and multiwavelength astronomy, has recently emerged as a distinct discipline providing unique and valuable insights into the properties and processes of the physical universe. These insights arise from the inherently complementary information carried by photons, gravitational waves, neutrinos, and cosmic rays about individual cosmic sources and source populations. Realizing the observation of astrophysical sources via non-photonic messengers has presented enormous challenges, as evidenced by the fiscal and physical scales of the multi-messenger observatories. However, the scientific payoff has already been substantial, with even greater rewards promised in the years ahead. In this review we survey the current status of multi-messenger astrophysics, highlighting some exciting recent results, and addressing the major follow-on questions they have raised. Key recent achievements include the measurement of the spectrum of ultra-high energy cosmic rays out to the highest observable energies; discovery of the diffuse high energy neutrino background; the first direct detections of gravitational waves and the use of gravitational waves to characterize merging black holes and neutron stars in strong-field gravity; and the identification of the first joint electromagnetic + gravitational wave and electromagnetic + high-energy neutrino multi-messenger sources. We then review the rationales for the next generation of multi-messenger observatories, and outline a vision of the most likely future directions for this exciting and rapidly advancing field.
Forward citations
Cited by 6 Pith papers
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Measurement of charged-particle production in $\sqrt{s_\text{NN}}=9.62$ TeV proton-oxygen collisions as a probe of cosmic-ray air showers with the ATLAS detector
ATLAS measured charged-particle production in 9.62 TeV p-O collisions, yielding a fiducial pO cross section of 396 mb and extrapolated p-air inelastic cross section of 406 mb, with distributions an order of magnitude ...
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Strong field gravitational lensing of particles by a black-bounce-Schwarzschild black hole
For a black-bounce-Schwarzschild black hole, the paper derives the strong-deflection lensing observables for massive particles and quantifies how they differ from photon lensing.
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Studying the mirror acceleration via kinetic simulations of relativistic plasma turbulence
3D PIC simulations of relativistic turbulence show mirror interactions drive perpendicular momentum gains correlated with local magnetic-field strengthening, yielding anisotropic high-energy particle distributions and...
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Trinity: An Air-Shower Imaging Instrument to detect Ultrahigh Energy Neutrinos
Proposes the Trinity air-shower imaging system for detecting ultrahigh energy tau neutrinos between 10^7 and 10^10 GeV to address IceCube neutrino sources, UHECR origins, and high-energy neutrino physics.
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GstLAL O4 Online Results Paper
GstLAL produced low-latency alerts for 250 astrophysically plausible gravitational-wave candidates during O4, providing the first upload for 222 and the sole upload for 75, with 88 percent of significant catalog event...
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Fundamental physics with high-energy cosmic neutrinos today and in the future
High-energy astrophysical neutrinos enable stringent tests of physics beyond the Standard Model at energies and baselines unreachable by other means.
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