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Cosmological gravitational waves from isocurvature fluctuations
Gravitational waves induced by large primordial curvature fluctuations may result in a
sizable stochastic gravitational wave background. Interestingly, curvature fluctuations are …
sizable stochastic gravitational wave background. Interestingly, curvature fluctuations are …
Probing primordial black hole scenarios with terrestrial gravitational wave detectors
It is possible that primordial black holes (PBHs) constitute (or constituted) a significant
fraction of the energy budget of our Universe. Terrestrial gravitational wave detectors offer …
fraction of the energy budget of our Universe. Terrestrial gravitational wave detectors offer …
Footprints of the QCD crossover on cosmological gravitational waves at pulsar timing arrays
Pulsar timing arrays (PTAs) have reported evidence for a stochastic gravitational wave (GW)
background at nanohertz frequencies, possibly originating in the early Universe. We show …
background at nanohertz frequencies, possibly originating in the early Universe. We show …
Probing the equation of state of the early Universe with pulsar timing arrays
The recently released data by pulsar timing array (PTA) collaborations have amassed
substantial evidence corroborating the existence of a stochastic signal consistent with a …
substantial evidence corroborating the existence of a stochastic signal consistent with a …
Scalar induced gravitational waves in light of Pulsar Timing Array data
The power-law parametrization for the energy density spectrum of gravitational wave (GW)
background is a useful tool to study its physics and origin. While scalar induced secondary …
background is a useful tool to study its physics and origin. While scalar induced secondary …
Constraints on primordial curvature power spectrum with pulsar timing arrays
The stochastic signal detected by NANOGrav, PPTA, EPTA, and CPTA can be explained by
the scalar-induced gravitational waves. In order to determine the scalar-induced …
the scalar-induced gravitational waves. In order to determine the scalar-induced …
Implications for the supermassive black hole binaries from the NANOGrav 15-year data set
Several pulsar timing array (PTA) collaborations, including NANOGrav, EPTA, PPTA, and
CPTA, have announced the evidence for a stochastic signal consistent with a stochastic …
CPTA, have announced the evidence for a stochastic signal consistent with a stochastic …
Primordial black holes from supercooled phase transitions
Y Gouttenoire, T Volansky - Physical Review D, 2024 - APS
Cosmological first-order phase transitions (1stOPTs) are said to be strongly supercooled
when the nucleation temperature is much smaller than the critical temperature. These are …
when the nucleation temperature is much smaller than the critical temperature. These are …
Singling out SO (10) GUT models using recent PTA results
In this work, we construct promising model-building routes towards SO (10) grand unified
theory inflation and examine their ability to explain the recent pulsar timing arrays (PTAs) …
theory inflation and examine their ability to explain the recent pulsar timing arrays (PTAs) …
Simultaneously probing the sound speed and equation of state of the early Universe with pulsar timing arrays
Recently, several major pulsar timing array (PTA) collaborations have assembled strong
evidence for the existence of a gravitational-wave background at frequencies around the …
evidence for the existence of a gravitational-wave background at frequencies around the …