440 citations · 3.8k across the 81 of their papers we have counts for
23 papers · 1 filter
Axion Inflation: Perturbative control in the strong backreaction regime
Valerie Domcke, Alexandros Papageorgiou, Marco Peloso +1
We study the strong backreaction regime in axion inflation, in which the friction from Abelian gauge fields generated via the pseudo-scalar interaction $\fracβ{4 M_p} ϕF {\tilde F}…
Cosmic Variance in Anisotropy Searches at Pulsar Timing Arrays
Valerie Domcke, Gabriele Franciolini, Mauro Pieroni
Recent pulsar timing array (PTA) analyses show evidence for a gravitational wave background (GWB) with angular correlations consistent with the Hellings-Downs curve. Anisotropies a…
Gravitational Wave Memory of Primordial Black Hole Mergers
Silvia Gasparotto, Gabriele Franciolini, Valerie Domcke
The gravitational wave signal of binary compact objects has two main contributions at frequencies below the characteristic merger frequency: the gravitational wave signal associate…
Discovery Opportunities with Gravitational Waves -- TASI 2024 Lecture Notes
Valerie Domcke
Recent advancements in gravitational wave astronomy hold the promise of a completely new way to explore our Universe. These lecture notes aim to provide a concise but self-containe…
Pulsar timing array sensitivity to anisotropies in the gravitational wave background
Paul Frederik Depta, Valerie Domcke, Gabriele Franciolini +1
Pulsar Timing Array (PTA) observations have recently gathered substantial evidence for the existence of a gravitational wave background in the nHz frequency band. Searching for ani…
LISA Definition Study Report
Monica Colpi, Karsten Danzmann, Martin Hewitson +108
The Laser Interferometer Space Antenna (LISA) is the first scientific endeavour to detect and study gravitational waves from space. LISA will survey the sky for Gravitational Waves…
Perturbatively including inhomogeneities in axion inflation
Valerie Domcke, Yohei Ema, Stefan Sandner
Axion inflation, i.e. an axion-like inflaton coupled to an Abelian gauge field through a Chern-Simons interaction, comes with a rich and testable phenomenology. This is particularl…
Search for scalar induced gravitational waves in the International Pulsar Timing Array Data Release 2 and NANOgrav 12.5 years datasets
Virgile Dandoy, Valerie Domcke, Fabrizio Rompineve
We perform a Bayesian search in the latest Pulsar Timing Array (PTA) datasets for a stochastic gravitational wave (GW) background sourced by curvature perturbations at scales $10^5…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
From NANOGrav to LIGO with metastable cosmic strings
Wilfried Buchmuller, Valerie Domcke, Kai Schmitz
We interpret the recent NANOGrav results in terms of a stochastic gravitational wave background from metastable cosmic strings. The observed amplitude of a stochastic signal can be…
Potential of radio telescopes as high-frequency gravitational wave detectors
Valerie Domcke, Camilo Garcia-Cely
In the presence of magnetic fields, gravitational waves are converted into photons and vice versa. We demonstrate that this conversion leads to a distortion of the cosmic microwave…
Deformation of the gravitational wave spectrum by density perturbations
Valerie Domcke, Ryusuke Jinno, Henrique Rubira
We study the effect of primordial scalar curvature perturbations on the propagation of gravitational waves over cosmic distances. We point out that such curvature perturbations def…
Resonant backreaction in axion inflation
Valerie Domcke, Veronica Guidetti, Yvette Welling +1
Axion inflation entails a coupling of the inflaton field to gauge fields through the Chern-Simons term. This results in a strong gauge field production during inflation, which back…
Measuring the net circular polarization of the stochastic gravitational wave background with interferometers
Valerie Domcke, Juan Garcia-Bellido, Marco Peloso +4
Parity violating interactions in the early Universe can source a stochastic gravitational wave background (SGWB) with a net circular polarization. In this paper, we study possible…
The Different Regimes of Axion Gauge Field Inflation
Valerie Domcke, Stefan Sandner
In axion gauge field inflation an axion-like particle driving cosmic inflation is coupled to the Chern-Simons density of an Abelian or non-Abelian gauge group. In the case of a non…
Strong constraints on clustered primordial black holes as dark matter
Torsten Bringmann, Paul Frederik Depta, Valerie Domcke +1
The idea of dark matter in the form of primordial black holes has seen a recent revival triggered by the LIGO detection of gravitational waves from binary black hole mergers. In th…
Probing non-Gaussian Stochastic Gravitational Wave Backgrounds with LISA
Nicola Bartolo, Valerie Domcke, Daniel G. Figueroa +7
The stochastic gravitational wave background (SGWB) contains a wealth of information on astrophysical and cosmological processes. A major challenge of upcoming years will be to ext…
PBH dark matter from axion inflation
Valerie Domcke, Francesco Muia, Mauro Pieroni +1
Protected by an approximate shift symmetry, axions are well motivated candidates for driving cosmic inflation. Their generic coupling to the Chern-Simons term of any gauge theory g…
Detection prospects for the Cosmic Neutrino Background using laser interferometers
Valerie Domcke, Martin Spinrath
The cosmic neutrino background is a key prediction of Big Bang cosmology which has not been observed yet. The movement of the earth through this neutrino bath creates a force on a…
Science with the space-based interferometer LISA. IV: Probing inflation with gravitational waves
Nicola Bartolo, Chiara Caprini, Valerie Domcke +11
We investigate the potential for the LISA space-based interferometer to detect the stochastic gravitational wave background produced from different mechanisms during inflation. Foc…
Probing inflation models with gravitational waves
Valerie Domcke
A direct detection of primordial gravitational waves is the ultimate probe for any inflation model. While current CMB bounds predict the generic scale-invariant gravitational wave…
Primordial gravitational waves for universality classes of pseudoscalar inflation
Valerie Domcke, Mauro Pieroni, Pierre Binétruy
Current bounds from the polarization of the CMB predict the scale-invariant gravitational wave (GW) background of inflation to be out of reach for upcoming GW interferometers. This…
Constraints on the reheating temperature from sizable tensor modes
Valerie Domcke, Jan Heisig
Despite its importance for modeling the homogeneous hot early universe very little is experimentally known about the magnitude of the reheating temperature, leaving an uncertainty…