These may allow us to sense
primordial gravitational waves from the very young universe.
Not exact matches
Physicists could look for evidence of other universes using tools designed to measure ripples in spacetime — also known as
primordial gravitational waves — that would have been generated by the universe's initial expansion
from the Big Bang.
It would be sensitive to nearly all the same targets investigated by LIGO and LISA out to distances of 10 billion light - years or more, but its true goal would be to assemble a detailed map of
gravitational waves from the earliest eras of the
primordial universe.
Dust left over
from an exploding star could mimic the effect that
primordial gravitational waves would have had on ancient cosmic light
These
primordial gravitational waves are too faint to be detectable directly, but it should be possible to see their imprint on the relic radiation
from the big bang — the cosmic microwave background.
From humanity's first, flawed foray to the surface of a comet to the celebrated discovery of (and less celebrated skepticism about)
primordial gravitational waves, 2014 has brought some historic successes and failures in space science and physics.
«If we do more measurements of this type at multiple frequencies, we will be able to separate out the dust signal
from the [
primordial] signal precisely» and do a more thorough search for
gravitational waves.
Dust grains in the Galaxy could imprint a similar polarization pattern in the CMB as
gravitational waves can, but based on several different predictions of the galactic contribution the researchers concluded that their data was more likely to originate
from primordial gravitational waves.
Wilczek reckons we will not have the sensitivity to detect the influence of
primordial gravitational waves in the CMB for at least 10 to 15 years, despite new high - resolution maps
from the Planck satellite.
Despite earlier reports of a possible detection, a joint analysis of data
from ESA's Planck satellite and the ground - based BICEP2 and Keck Array experiments has found no conclusive evidence of
primordial gravitational waves.
The new dust analysis leaves open the possibility that part of the BICEP2 signal comes
from primordial gravitational waves, which are the long - sought fingerprints of a leading Big Bang theory called «inflation.»
Now, scientists have shown that the swirl pattern touted as evidence of
primordial gravitational waves — ripples in space and time dating to the universe's explosive birth — could instead all come
from magnetically aligned dust.