Spectral Fingerprints Beyond Degeneracies in Primordial Gravitational-Wave Sources

arXiv:2608.17002 · astro-ph.CO, hep-ph · Submitted 2026-08-17 · Read on arXiv

astro-ph.CO, hep-ph

Submitted: 2026-08-17

Updated: 2026-09-13

Comments: 5+2 pages,4 figures. This version has been submitted to the journal

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Benchmark — 5× in this paper · explained in 2 episodes
• Degeneracy — 3× in this paper · explained in 3 episodes
• Frequency Dependence — 2× in this paper · explained in 2 episodes
• Adam — 1× in this paper · explained in 2 episodes
• Spectral Signature — 1× in this paper · explained in 2 episodes

Sources

• Observation of Gravitational Waves from a Binary Black Hole Merger
• Properties of the Binary Black Hole Merger GW150914
• GW150914: The Advanced LIGO Detectors in the Era of First Discoveries
• GW150914: First results from the search for binary black hole coalescence with Advanced LIGO
• GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2
• Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run
• The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
• The second data release from the European Pulsar Timing Array I. The dataset and timing analysis
• Search for an isotropic gravitational-wave background with the Parkes Pulsar Timing Array
• The Parkes Pulsar Timing Array Third Data Release
• Searching for the nano-Hertz stochastic gravitational wave background with the Chinese Pulsar Timing Array Data Release I
• Primordial black holes and second order gravitational waves from ultra-slow-roll inflation
• Scalar induced gravitational waves in inflation with gravitationally enhanced friction
• Small scale induced gravitational waves from primordial black holes, a stringent lower mass bound, and the imprints of an early matter to radiation transition
• Primordial black holes and induced gravitational waves in $k$-inflation
• Implications of stochastic effects for primordial black hole production in ultra-slow-roll inflation
• PBHs and secondary GWs from ultra slow roll and punctuated inflation
• Observational imprints of enhanced scalar power on small scales in ultra slow roll inflation and associated non-Gaussianities
• Gravitational waves induced by matter isocurvature in general cosmologies
• Induced Gravitational Wave interpretation of PTA data: a complete study for general equation of state

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