A tale of two toy models: towards understanding the geometry of cosmic rays in the Milky Way
Today’s astrobite looks at how we can use observations of gamma-rays and neutrinos to test our models of cosmic rays.
Did we detect the death of a primordial black hole?
In February 2023, the KM3NeT underwater observatory observed the highest-energy neutrino ever detected. Did it come from a dying primordial black hole?
How One Pulsar Can Look Like Three: Cosmic-Ray Mirage Halos in the Gamma-Ray Sky
Cosmic rays don’t always reveal their origins honestly—magnetic fields can bend their paths and create “mirage halos” that look like real gamma-ray sources. New simulations show how a single pulsar can masquerade as three, reshaping how we interpret TeV observations.
Does the Hubble tension arise from heterogeneity in Type-Ia supernovae?
How standardizable of a candle are Type-1a supernovae? Learn how differing initial conditions causing a white dwarf to exceed the Chandrasekhar limit and explode might reconcile independent measurements of the Universe’s expansion rate and history.
Connections Between X-Ray and Neutrino Emission?
Today’s authors investigate how the physics in the extreme environments in the centers of galaxies leads to connections between X-rays and ghostly particles called neutrinos!
The snack that fights back
Today’s bite explores how munching on tiny black holes can lead stars to an early demise.