10 papers
TeV-PeV Gamma-ray and Neutrino Emission in the Galactic Plane
Saikat Das, Nayantara Gupta, Siyao Xu
We model the LHAASO observation of diffuse TeV--PeV rays in the Galactic plane as the sum of unresolved leptonic emission from pulsar wind nebulae and hadronic emission from s…
Zooming in on the GeV -ray flare of the blazar PKS 1725+123 with a multimessenger lens
Suvas Chandra Chaudhary, Saikat Das, Raj Prince +1
Blazars are promising sources of extragalactic high-energy astrophysical neutrinos, detected at energies TeV by the IceCube neutrino observatory. Here, we report the f…
Turbulence Mode Decomposition and Anisotropy in Magnetically Dominated Collisionless Plasmas
Samuel T. Sebastian, Siyao Xu, Yue Hu +3
We use the 3D fully kinetic simulation to study different turbulence modes and turbulence anisotropy of relativistic turbulence in magnetically dominated collisionless plasmas. We…
Cosmogenic Origin of KM3-230213A: Delayed Gamma-Ray Emission from A Cosmic-Ray Transient
Sovan Boxi, Saikat Das, Nayantara Gupta
The highest-energy cosmic neutrino detected by the ARCA detector of KM3NeT has reignited the quest to pinpoint the sources of ultrahigh-energy cosmic rays (UHECRs; E…
Cosmic-Ray Constraints on the Flux of Ultra-High-Energy Neutrino Event KM3-230213A
Saikat Das, Bing Zhang, Soebur Razzaque +1
The detection of a ~PeV muon neutrino event by the KM3NeT telescope offers an unprecedented opportunity to probe the Universe at extreme energies. A photopion interactio…
Composite asymmetric dark matter with a dark photon portal: Multimessenger tests
Saikat Das, Ayuki Kamada, Takumi Kuwahara +2
Composite asymmetric dark matter (ADM) is the framework that naturally explains the coincidence of the baryon density and the dark matter density of the Universe. Through a portal…