10 papers
Fermi bubbles detected in 100 TeV neutrinos
Uri Keshet, Ilya Gurwich
The Fermi bubbles have been identified as a collimated bipolar outflow emanating from the Milky-Way center, tracing strong forward shocks which extend kpc from the Galacti…
Galaxy-cluster-stacked Fermi-LAT, part IV: GeV WIMP annihilation lines
Uri Keshet
The strongest constraints on the velocity-dependent (-wave) annihilation of weakly interacting massive particle (WIMP) dark matter were derived from the deep potential wells of…
Nested Fermi and eROSITA bubbles require very similar erg collimated Galactic-center outbursts; their asymmetry indicates an eastern density gradient
Arka Ghosh, Uri Keshet, Santanu Mondal
Observations indicate two nested pairs of extended bipolar bubbles emanating from the Milky-Way center - the latitude eROSITA bubbles (RBs), encompassing the smal…
Mach shocks at the tips of both eROSITA bubbles
Uri Keshet, Arka Ghosh
eROSITA substantiated earlier indications that Loop-I is the northern part of an extended bipolar Galactic-bubble structure, but the southern bubble was not established in nontherm…
Cavitation instability in unmagnetized relativistic pair shocks
Ivan Demidov, Yuri Lyubarsky, Uri Keshet
We investigate the formation of plasma cavities in unmagnetized relativistic pair shocks and demonstrate that these cavities emerge naturally as a nonlinear consequence of asymmetr…
Radially polarized synchrotron from galaxy-cluster virial shocks
Uri Keshet
Radio-to--ray signals, recently found narrowly confined near the characteristic scaled radii of galaxy clusters and groups, have been associated with their virial…