Not exact matches
When it
comes to the highest energy cosmic rays — subatomic
particles raining in
from space — the sky is lopsided: More
come from one
direction than the other, according to a new study.
An international team analyzed about 12 years of data to show that
particles with energies above 8 billion billion electron volts generally
come from a particular
direction in the sky, and it's not the galaxy's center.
Solar plasma produces a distinctive magnetic field because it all
comes from the same source; scientists expected that the field would shift in interstellar space, where
particles flit around in all
directions.
However, due to the rotation of Earth around its own axis, dark matter
particles that
come from the
direction of the dark matter wind, travel different distances during the 24 hour period of a day.
How many of these
particles are
coming in, and what
direction are they
coming from?
Three hours later — just long enough for some of those
particles to have decayed into neutrinos — an array of sensors buried in Antarctic ice, called IceCube, saw one of the highest - energy neutrinos ever detected
coming from the
direction of the galactic centre (Physical Review D, doi.org/v3p).