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The Simons Observatory: forecasted constraints on primordial gravitational waves with the expanded array of Small Aperture Telescopes
The Simons Observatory Collaboration, I. Abril-Cabezas, S. Adachi +479
We present updated forecasts for the scientific performance of the degree-scale (0.5 deg FWHM at 93 GHz), deep-field survey to be conducted by the Simons Observatory (SO). By 2027,…
Cosmic tidal reconstruction in redshift space
Shi-Hui Zang, Hong-Ming Zhu, Marcel Schmittfull +1
The gravitational coupling between large- and small-scale density perturbations leads to anisotropic distortions to the local small-scale matter fluctuations. Such local anisotropi…
Iterative reconstruction excursions for Baryon Acoustic Oscillations and beyond
Hee-Jong Seo, Atsuhisa Ota, Marcel Schmittfull +2
The density field reconstruction technique has been widely used for recovering the Baryon Acoustic Oscillation (BAO) feature in galaxy surveys that has been degraded due to nonline…
Modeling Galaxies in Redshift Space at the Field Level
Marcel Schmittfull, Marko Simonović, Mikhail M. Ivanov +2
We develop an analytical forward model based on perturbation theory to predict the redshift-space galaxy overdensity at the field level given a realization of the initial condition…
Galaxy Skew-Spectra in Redshift-Space
Marcel Schmittfull, Azadeh Moradinezhad Dizgah
Modern galaxy surveys focus on the galaxy power spectrum or 2-point correlation function to test and constrain cosmological models. Additional information comes from higher-order N…
Fewer Mocks and Less Noise: Reducing the Dimensionality of Cosmological Observables with Subspace Projections
Oliver H. E. Philcox, Mikhail M. Ivanov, Matias Zaldarriaga +2
Creating accurate and low-noise covariance matrices represents a formidable challenge in modern-day cosmology. We present a formalism to compress arbitrary observables into a small…
CMB-S4: Forecasting Constraints on Primordial Gravitational Waves
S4 Collaboration, Kevork Abazajian, Graeme E. Addison +233
CMB-S4---the next-generation ground-based cosmic microwave background (CMB) experiment---is set to significantly advance the sensitivity of CMB measurements and enhance our underst…
Rotation method for accelerating multiple-spherical Bessel function integrals against a numerical source function
Zachary Slepian, Yin Li, Marcel Schmittfull +1
A common problem in cosmology is to integrate the product of two or more spherical Bessel functions (sBFs) with different configuration-space arguments against the power spectrum o…
Capturing Non-Gaussianity of the Large-Scale Structure with Weighted Skew-Spectra
Azadeh Moradinezhad Dizgah, Hayden Lee, Marcel Schmittfull +1
The forthcoming generation of wide-field galaxy surveys will probe larger volumes and galaxy densities, thus allowing for a much larger signal-to-noise ratio for higher-order clust…
BAO Modulation as a Probe of Compensated Isocurvature Perturbations
Chen Heinrich, Marcel Schmittfull
Compensated isocurvature perturbations (CIPs) are opposite spatial fluctuations in the baryon and dark matter density. They can be generated for example in the curvaton model in th…
Inflation and Dark Energy from spectroscopy at
Simone Ferraro, Michael J. Wilson, Muntazir Abidi +140
The expansion of the Universe is understood to have accelerated during two epochs: in its very first moments during a period of Inflation and much more recently, at , when D…
Primordial Non-Gaussianity
P. Daniel Meerburg, Daniel Green, Muntazir Abidi +175
Our current understanding of the Universe is established through the pristine measurements of structure in the cosmic microwave background (CMB) and the distribution and shapes of…
Modeling Biased Tracers at the Field Level
Marcel Schmittfull, Marko Simonović, Valentin Assassi +1
In this paper we test the perturbative halo bias model at the field level. The advantage of this approach is that any analysis can be done without sample variance if the same initi…
Towards Neutrino Mass from Cosmology without Optical Depth Information
Byeonghee Yu, Robert Z Knight, Blake D. Sherwin +3
With low redshift probes reaching unprecedented precision, uncertainty of the CMB optical depth is expected to be the limiting factor for future cosmological neutrino mass constrai…
The Simons Observatory: Science goals and forecasts
The Simons Observatory Collaboration, Peter Ade, James Aguirre +247
The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scient…
On the effect of non-Gaussian lensing deflections on CMB lensing measurements
Vanessa Böhm, Blake D. Sherwin, Jia Liu +3
We investigate the impact of non-Gaussian lensing deflections on measurements of the CMB lensing power spectrum. We find that the false assumption of their Gaussianity significantl…
Galaxy power-spectrum responses and redshift-space super-sample effect
Yin Li, Marcel Schmittfull, Uroš Seljak
As a major source of cosmological information, galaxy clustering is susceptible to long-wavelength density and tidal fluctuations. These long modes modulate the growth and expansio…
Parameter constraints from cross-correlation of CMB lensing with galaxy clustering
Marcel Schmittfull, Uros Seljak
The lensing convergence measurable with future CMB surveys like CMB-S4 will be highly correlated with the clustering observed by deep photometric large scale structure (LSS) survey…
Theoretical Systematics of Future Baryon Acoustic Oscillation Surveys
Zhejie Ding, Hee-Jong Seo, Zvonimir Vlah +3
Future Baryon Acoustic Oscillation surveys aim at observing galaxy clustering over a wide range of redshift and galaxy populations at great precision, reaching tenths of a percent,…
Iterative initial condition reconstruction
Marcel Schmittfull, Tobias Baldauf, Matias Zaldarriaga
Motivated by recent developments in perturbative calculations of the nonlinear evolution of large-scale structure, we present an iterative algorithm to reconstruct the initial cond…
Full covariance of CMB and lensing reconstruction power spectra
Julien Peloton, Marcel Schmittfull, Antony Lewis +2
CMB and lensing reconstruction power spectra are powerful probes of cosmology. However they are correlated, since the CMB power spectra are lensed and the lensing reconstruction is…
FFT-PT: Reducing the two-loop large-scale structure power spectrum to low-dimensional radial integrals
Marcel Schmittfull, Zvonimir Vlah
Modeling the large-scale structure of the universe on nonlinear scales has the potential to substantially increase the science return of upcoming surveys by increasing the number o…
CMB-S4 Science Book, First Edition
Kevork N. Abazajian, Peter Adshead, Zeeshan Ahmed +83
This book lays out the scientific goals to be addressed by the next-generation ground-based cosmic microwave background experiment, CMB-S4, envisioned to consist of dedicated teles…
Improving photometric redshifts with Ly tomography
Marcel Schmittfull, Martin White
Forming a three dimensional view of the Universe is a long-standing goal of astronomical observations, and one that becomes increasingly difficult at high redshift. In this paper w…