Publications (26)
Testing General Relativity with Present and Future Astrophysical Observations
Emanuele Berti, Enrico Barausse, Vitor Cardoso +50
One century after its formulation, Einstein's general relativity has made remarkable predictions and turned out to be compatible with all experimental tests. Most of these tests pr…
An aligned-spin neutron-star--black-hole waveform model based on the effective-one-body approach and numerical-relativity simulations
Andrew Matas, Tim Dietrich, Alessandra Buonanno +8
After the discovery of gravitational waves from binary black holes (BBHs) and binary neutron stars (BNSs) with the LIGO and Virgo detectors, neutron-star--black-holes (NSBHs) are t…
Point particle motion in topologically nontrivial space-times
Andrew Matas, Daniel Müller, Glenn Starkman
It is well known that compactifying a space can break symmetries that are present in the covering space. In this paper we study the effects of such topological symmetry breaking on…
Waves from the Centre: Probing PBH and other Macroscopic Dark Matter with LISA
Florian Kuhnel, Andrew Matas, Glenn D. Starkman +1
A significant fraction of cosmological dark matter can be formed by very dense macroscopic objects, for example primordial black holes. Gravitational waves offer a promising way to…
pygwb: Python-based library for gravitational-wave background searches
Arianna I. Renzini, Alba Romero-Rodrguez, Colm Talbot +31
The collection of gravitational waves (GWs) that are either too weak or too numerous to be individually resolved is commonly referred to as the gravitational-wave background (GWB).…
A stochastic search for intermittent gravitational-wave backgrounds
Jessica Lawrence, Kevin Turbang, Andrew Matas +3
A likely source of a gravitational-wave background (GWB) in the frequency band of the Advanced LIGO, Virgo and KAGRA detectors is the superposition of signals from the population o…
New Kinetic Terms for Massive Gravity and Multi-gravity: A No-Go in Vielbein Form
Claudia de Rham, Andrew Matas, Andrew J. Tolley
We reconsider the possibility of a class of new kinetic terms in the first order (vielbein) formulation of massive gravity and multi-gravity. We find that new degrees of freedom em…
Deconstructing Dimensions and Massive Gravity
Claudia de Rham, Andrew Matas, Andrew J. Tolley
We show that the ghost-free models of massive gravity and their multi-graviton extensions follow from considering higher dimensional General Relativity in Einstein-Cartan form on a…
The Next Generation Global Gravitational Wave Observatory: The Science Book
Vicky Kalogera, B. S. Sathyaprakash, Matthew Bailes +88
The next generation of ground-based gravitational-wave detectors will observe coalescences of black holes and neutron stars throughout the cosmos, thousands of them with exceptiona…
Frequentist versus Bayesian analyses: Cross-correlation as an (approximate) sufficient statistic for LIGO-Virgo stochastic background searches
Andrew Matas, Joseph D. Romano
Sufficient statistics are combinations of data in terms of which the likelihood function can be rewritten without loss of information. Depending on the data volume reduction, the u…
Interactions of Charged Spin-2 Fields
Claudia de Rham, Andrew Matas, Nicholas Ondo +1
In light of recent progress in ghost-free theories of massive gravity and multi-gravity, we reconsider the problem of constructing a ghost-free theory of an interacting spin-2 fiel…
Galileon Radiation from Binary Systems
Claudia de Rham, Andrew Matas, Andrew J. Tolley
We calculate the power emitted in scalar modes for a binary systems, including binary pulsars, with a conformal coupling to the most general Galileon effective field theory by cons…
Polarization-based Tests of Gravity with the Stochastic Gravitational-Wave Background
Thomas Callister, A. Sylvia Biscoveanu, Nelson Christensen +7
The direct observation of gravitational waves with Advanced LIGO and Advanced Virgo offers novel opportunities to test general relativity in strong-field, highly dynamical regimes.…
A first search for a stochastic gravitational-wave background from ultralight bosons
Leo Tsukada, Thomas Callister, Andrew Matas +1
In this work, we develop a Bayesian data analysis framework to study the SGWB from bosonic clouds using data from Advanced LIGO and Advanced Virgo, building on previous work by Bri…
Cosmology and the Early Universe
B. S. Sathyaprakash, Enis Belgacem, Daniele Bertacca +15
This Astro-2020 White Paper deals with what we might learn from future gravitational wave observations about the early universe phase transitions and their energy scales, primordia…
Ostrogradsky in Theories with Multiple Fields
Claudia de Rham, Andrew Matas
We review how the (absence of) Ostrogradsky instability manifests itself in theories with multiple fields. It has recently been appreciated that when multiple fields are present, t…
New Kinetic Interactions for Massive Gravity?
Claudia de Rham, Andrew Matas, Andrew J. Tolley
We show that there can be no new Lorentz invariant kinetic interactions free from the Boulware-Deser ghost in four dimensions in the metric formulation of gravity, beyond the stand…
Primordial Black-Hole and Macroscopic Dark-Matter Constraints with LISA
Florian Kuhnel, Glenn D. Starkman, Katherine Freese +1
The detectability of gravitational waves originating from primordial black holes or other large macroscopic dark-matter candidates inspiraling into Sagittarius is i…
Cutoff for Extensions of Massive Gravity and Bi-Gravity
Andrew Matas
Recently there has been interest in extending ghost-free massive gravity, bi-gravity, and multi-gravity by including non-standard kinetic terms and matter couplings. We first revie…
Superluminality in the Bi- and Multi- Galileon
Paul de Fromont, Claudia de Rham, Lavinia Heisenberg +1
We re-explore the Bi- and Multi-Galileon models with trivial asymptotic conditions at infinity and show that propagation of superluminal fluctuations is a common and unavoidable fe…
Symmetron Cosmology
Kurt Hinterbichler, Justin Khoury, Aaron Levy +1
The symmetron is a scalar field associated with the dark sector whose coupling to matter depends on the ambient matter density. The symmetron is decoupled and screened in regions o…
Targeted search for the stochastic gravitational-wave background from the galactic millisecond pulsar population
Deepali Agarwal, Jishnu Suresh, Vuk Mandic +2
The millisecond pulsars, old-recycled objects spinning with high frequency (kHz) sustaining the deformation from their spherical shape, may emit gravitational waves (…
Measurement and subtraction of Schumann resonances at gravitational-wave interferometers
Michael W. Coughlin, Alessio Cirone, Patrick Meyers +23
Correlated magnetic noise from Schumann resonances threatens to contaminate the observation of a stochastic gravitational-wave background in interferometric detectors. In previous…
Gravitational-wave searches in the era of Advanced LIGO and Virgo
Sarah Caudill, Shivaraj Kandhasamy, Claudia Lazzaro +3
The field of gravitational-wave astronomy has been opened up by gravitational-wave observations made with interferometric detectors. This review surveys the current state-of-the-ar…
Multi-wavelength observations of cosmological phase transitions using LISA and Cosmic Explorer
Margot Fitz Axen, Sharan Banagiri, Andrew Matas +2
We reanalyze the detection possibilities for gravitational waves arising from cosmological first order phase transitions. We discuss the stochastic gravitational wave background co…
Angular Resolution of the Search for Anisotropic Stochastic Gravitational-Wave Background with Terrestrial Gravitational-Wave Detectors
Erik Floden, Vuk Mandic, Andrew Matas +1
We consider an anisotropic search for the stochastic gravitational-wave (GW) background by decomposing the gravitational-wave sky into its spherical harmonics components. Previous…