128 citations · 855 across the 30 of their papers we have counts for
31 papers
Correlated Radio Frequency Interference Monitor for Radio Telescopes
Lindsay Berkhout, Ian Hendricksen, Joshua Montgomery +8
Radio frequency interference (RFI) is one of the biggest challenges facing current radio astronomy experiments. Telescopes like the Canadian Hydrogen Observatory and Radio transien…
Cosmic topology. Part Va. Information content of the observable Universe
Deyan P. Mihaylov, Mikel Martin Barandiaran, Stefano Anselmi +14
If the Universe possesses a compact spatial topology with characteristic scale not much larger than the diameter of the observable Universe, then the associated symmetry transforma…
Overview of the Canadian Hydrogen Observatory and Radio Transient Detector (CHORD) Project
The CHORD Collaboration, Kevin Bandura, Leonid Belostotski +49
The Canadian Hydrogen Observatory and Radio-transient Detector (CHORD) is a next-generation wideband radio interferometer currently being constructed and commissioned at the Domini…
Cosmic topology. Part IVa. Classification of manifolds using machine learning: a case study with small toroidal universes
Andrius Tamosiunas, Fernando Cornet-Gomez, Yashar Akrami +16
Non-trivial spatial topology of the Universe may give rise to potentially measurable signatures in the cosmic microwave background. We explore different machine learning approaches…
Cosmic topology. Part IIa. Eigenmodes, correlation matrices, and detectability of orientable Euclidean manifolds
Johannes R. Eskilt, Yashar Akrami, Stefano Anselmi +11
If the Universe has non-trivial spatial topology, observables depend on both the parameters of the spatial manifold and the position and orientation of the observer. In infinite Eu…
Constraining the quantum gravity polymer scale using LIGO data
Angel Garcia-Chung, Matthew F. Carney, James B. Mertens +3
We present the first empirical constraints on the polymer scale describing polymer quantized GWs propagating on a classical background. These constraints are determined from the po…
What do gravitational wave detectors say about polymer quantum effects?
Angel Garcia-Chung, Matthew F. Carney, James B. Mertens +3
We compute the expected response of detector arms of gravitational wave observatories to polymerized gravitational waves. The mathematical and theoretical features of these waves w…
What is flat ΛCDM, and may we choose it?
Stefano Anselmi, Matthew F. Carney, John T. Giblin +5
The Universe is neither homogeneous nor isotropic, but it is close enough that we can reasonably approximate it as such on suitably large scales. The inflationary--Cold Dark Mat…
Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
Elcio Abdalla, Guillermo Franco Abellán, Amin Aboubrahim +200
In this paper we will list a few important goals that need to be addressed in the next decade, also taking into account the current discordances between the different cosmological…
Gravitational Waves from Fully General Relativistic Oscillon Preheating
Xiao-Xiao Kou, James B. Mertens, Chi Tian +1
As long-lived quasi-solitons from the fragmentation of a scalar condensate, oscillons may dominate the preheating era after inflation. During this period, stochastic gravitational…
A model of polymer gravitational waves: theory and some possible observational consequences
Angel Garcia-Chung, James B. Mertens, Saeed Rastgoo +2
We propose a polymer quantization scheme to derive the effective propagation of gravitational waves on a classical Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime. These waves…
Accurate relativistic observables from post-processing light cone catalogues
Chi Tian, Matthew F. Carney, James B. Mertens +1
We introduce and study a new scheme to construct relativistic observables from post-processing light cone data. This construction is based on a novel approach, LC-Metric, which tak…
Propagation of quantum gravity-modified gravitational waves on a classical FLRW spacetime
Angel Garcia-Chung, James B. Mertens, Saeed Rastgoo +2
The linearized Einstein field equations provide a low-energy wave equation for the propagation of gravitational fields which may originate from a high energy source. Motivated by l…
On the question of measuring spatial curvature in an inhomogeneous universe
Chi Tian, Stefano Anselmi, Matthew F. Carney +3
The curvature of a spacetime, either in a topological sense, or averaged over super-horizon-sized patches, is often equated with the global curvature term that appears in Friedmann…
Numerical solutions to Einstein's equations in a shearing-dust Universe: a code comparison
Julian Adamek, Cristian Barrera-Hinojosa, Marco Bruni +3
A number of codes for general-relativistic simulations of cosmological structure formation have been developed in recent years. Here we demonstrate that a sample of these codes pro…
Probing correlated compensated isocurvature perturbations using scale-dependent galaxy bias
Selim C. Hotinli, James B. Mertens, Matthew C. Johnson +1
Compensated isocurvature perturbations (CIPs) are modulations of the relative baryon and dark matter density that leave the total matter density constant. The best current constrai…
The Simons Observatory: Astro2020 Decadal Project Whitepaper
The Simons Observatory Collaboration, Maximilian H. Abitbol, Shunsuke Adachi +280
The Simons Observatory (SO) is a ground-based cosmic microwave background (CMB) experiment sited on Cerro Toco in the Atacama Desert in Chile that promises to provide breakthrough…
Towards detection of relativistic effects in galaxy number counts using kSZ Tomography
Dagoberto Contreras, Matthew C. Johnson, James B. Mertens
High-resolution, low-noise observations of the cosmic microwave background (CMB) planned for the near-future will enable new cosmological probes based on re-scattered CMB photons -…
The Next Generation of Cosmological Measurements with Type Ia Supernovae
Dan Scolnic, Saul Perlmutter, Greg Aldering +56
While Type Ia Supernovae (SNe Ia) are one of the most mature cosmological probes, the next era promises to be extremely exciting in the number of different ways SNe Ia are used to…
Cosmic expansion from spinning black holes
John T. Giblin, James B. Mertens, Glenn D. Starkman +1
We examine how cosmological expansion arises in a universe containing a lattice of spinning black holes. We study averaged expansion properties as a function of fundamental propert…
Transverse Velocities with the Moving Lens Effect
Selim C. Hotinli, Joel Meyers, Neal Dalal +6
Gravitational potentials which change in time induce fluctuations in the observed cosmic microwave background (CMB) temperature. Cosmological structure moving transverse to our lin…
The Limited Accuracy of Linearized Gravity
John T. Giblin, James B. Mertens, Glenn D. Starkman +1
Standard cosmological models rely on an approximate treatment of gravity, utilizing solutions of the linearized Einstein equations as well as physical approximations. In an era of…
Simulated reconstruction of the remote dipole field using the kinetic Sunyaev Zel'dovich effect
Juan I. Cayuso, Matthew C. Johnson, James B. Mertens
The kinetic Sunyaev Zel'dovich (kSZ) effect, cosmic microwave background (CMB) anisotropies induced by scattering from free electrons in bulk motion, is a primary target of future…
General Relativistic Corrections to the Weak Lensing Convergence Power Spectrum
John T. Giblin, James B. Mertens, Glenn D. Starkman +1
We compute the weak lensing convergence power spectrum, , in a dust-filled universe using fully non-linear general relativistic simulations. The spectrum is then compare…