REVIEW 3 cited by
Can the gravitational wave background feel wiggles in spacetime?
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
Signed reviews
read the original abstract
Recently the international pulsar timing array collaboration has announced the first strong evidence for an isotropic gravitational wave background (GWB). We propose that rapid small oscillations (wiggles) in the Hubble parameter would trigger a resonance with the propagating gravitational waves, leaving novel signature in the GWB spectrum in the form of sharp resonance peaks. The proposed signal can appear at all frequency ranges and is common to continuous spectrum GWBs with arbitrary origin. Due to its resonant nature, the signal strength differs by a perturbation order depending on whether the GWB is primordial or not, which makes it a smoking gun for the primordial origin of the observed GWB. We show that a large part of the parameter space of such signal can be constrained by near future PTA observations, while fitting the signal template to the current NanoGrav 15yr data already hints an interesting feature near 15 nHz.
Forward citations
Cited by 3 Pith papers
-
Bridge the Cosmological Tensions with Thawing Gravity
Thawing Gravity, a scalar-tensor theory with a non-minimally coupled scalar field, fits the full cosmological dataset better than LambdaCDM and yields H0=71.78+/-0.86 and S8=0.793+/-0.012.
-
Purely quadratic non-Gaussianity from tachyonic instability: Primordial black holes and scalar-induced gravitational waves
Purely quadratic non-Gaussianity from tachyonic instability allows narrow curvature spectra to exponentially suppress primordial black hole overproduction via correlation coefficient ρ approaching -1 while retaining s...
-
The power of SKA to Constrain cosmological gravitational-wave backgrounds below the astrophysical foreground noise
Cosmological gravitational wave backgrounds from phase transitions, domain walls, and condensate fragmentation are capped far below the astrophysical foreground by requiring that compact dark matter subhalos, which SK...
Discussion (0). Continue with ORCID to comment.