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Found 19 papers, 11 papers with code
New approach to template banks of gravitational waves with higher harmonics: Reducing matched-filtering cost by over an order of magnitude
To model aligned-spin $(3, 3)$, $(4, 4)$ waveforms corresponding to a given $(2, 2)$ waveform, we use a combination of post-Newtonian formulae and machine learning tools.
Fewer Mocks and Less Noise: Reducing the Dimensionality of Cosmological Observables with Subspace Projections
The procedure is validated with full-shape analyses of power spectra from BOSS DR12 mock catalogs, showing that the 96-bin power spectra can be replaced by 12 subspace coefficients without biasing the output cosmology; this allows for accurate parameter inference using only $\sim 100$ mocks.
Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics High Energy Physics - Theory Data Analysis, Statistics and Probability
Blinded challenge for precision cosmology with large-scale structure: results from effective field theory for the redshift-space galaxy power spectrum
An accurate theoretical template for the galaxy power spectrum is a key for the success of ongoing and future spectroscopic surveys.
Cosmology and Nongalactic Astrophysics
Combining Full-Shape and BAO Analyses of Galaxy Power Spectra: A 1.6% CMB-independent constraint on H0
We present cosmological constraints from a joint analysis of the pre- and post-reconstruction galaxy power spectrum multipoles from the final data release of the Baryon Oscillation Spectroscopic Survey (BOSS).
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology
Cosmological Parameters and Neutrino Masses from the Final Planck and Full-Shape BOSS Data
We present a joint analysis of the Planck cosmic microwave background (CMB) and Baryon Oscillation Spectroscopic Survey (BOSS) final data releases.
Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology
Cosmological Parameters from the BOSS Galaxy Power Spectrum
We present cosmological parameter measurements from the publicly available Baryon Oscillation Spectroscopic Survey (BOSS) data on anisotropic galaxy clustering in Fourier space.
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology
New Binary Black Hole Mergers in the Second Observing Run of Advanced LIGO and Advanced Virgo
The most secure new event, GW170121 ($p_{\rm astro} > 0. 99$), is also notable due to its inferred negative value of $\chi_{\rm eff}$, which is inconsistent with being positive at the $\approx 95. 8\%$ confidence level.
High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology
A Highly Spinning and Aligned Binary Black Hole Merger in the Advanced LIGO First Observing Run
We report a new binary black hole merger in the publicly available LIGO First Observing Run (O1) data release.
High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics General Relativity and Quantum Cosmology
Modeling Biased Tracers at the Field Level
In contrast, for linear bias the mean-square model error can be higher than the Poisson prediction by factors of up to a few on large scales, and it becomes scale dependent already in the linear regime.
Cosmology and Nongalactic Astrophysics
Constraints on Binary Black Hole Populations from LIGO-Virgo Detections
The three lightest binary black hole events are consistent with having a maximally spinning secondary but only for small mass ratios ($q\lesssim 0. 4$) as a result of the spin-mass ratio degeneracy.
High Energy Astrophysical Phenomena
Heating of the intergalactic medium by the cosmic microwave background during cosmic dawn
We also find that the effect is more dramatic in non-standard scenarios that either enhance the radio background above the CMB or invoke new physics to cool the gas in order to explain the EDGES results.
Cosmology and Nongalactic Astrophysics
Efficient Evaluation of Cosmological Angular Statistics
In this paper, we provide a simple and fast method to compute the angular power spectrum and bispectrum of any observable.
Cosmology and Nongalactic Astrophysics
Iterative initial condition reconstruction
In our idealized dark matter simulations, the method improves the BAO signal-to-noise ratio by a factor of 2. 7 at $z=0$ and by a factor of 2. 5 at $z=0. 6$, improving standard BAO reconstruction by $70\%$ at $z=0$ and $30\%$ at $z=0. 6$, and matching the optimal BAO signal and signal-to-noise ratio of the linear density in the same volume.
Cosmology and Nongalactic Astrophysics
Solving Large Scale Structure in Ten Easy Steps with COLA
Achieving a similar level of accuracy in halo statistics without the COLA method requires at least 3 times more timesteps than when COLA is employed.
Cosmology and Nongalactic Astrophysics
Separating the Early Universe from the Late Universe: cosmological parameter estimation beyond the black box
We present a method for measuring the cosmic matter budget without assumptions about speculative Early Universe physics, and for measuring the primordial power spectrum P*(k) non-parametrically, either by combining CMB and LSS information or by using CMB polarization.
CMBFAST for spatially closed universes
We extend the cosmological linear perturbation theory code CMBFAST to closed geometries.
astro-ph
Gravitational Lensing Effect on Cosmic Microwave Background Polarization
As in the case of temperature spectrum gravitational lensing leads to smoothing of narrow features and enhancement of power on the damping tail of the power spectrum.
astro-ph
A Complete Treatment of CMB Anisotropies in a FRW Universe
We generalize the total angular momentum method for computing Cosmic Microwave Background anisotropies to Friedman-Robertson-Walker (FRW) spaces with arbitrary geometries.
astro-ph
A Line of Sight Approach to Cosmic Microwave Background Anisotropies
The source term can be expressed in terms of photon, baryon and metric perturbations, all of which can be calculated using a small number of differential equations.
astro-ph
