The High Latitude Spectroscopic Survey on the Nancy Grace Roman Space Telescope

Wang, Yun; Zhai, Zhongxu; Alavi, Anahita; Massara, Elena; Pisani, Alice; Benson, Andrew; Hirata, Christopher M.; Samushia, Lado; Weinberg, David H.; Colbert, James; Doré, Olivier; Eifler, Tim; Heinrich, Chen; Ho, Shirley; Krause, Elisabeth; Padmanabhan, Nikhil; Spergel, David; Teplitz, Harry I.

doi:10.48550/arxiv.2110.01829

Cited by 3 publications

(5 citation statements)

References 100 publications

(126 reference statements)

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“…Digital Sky Surveys (BOSS & eBOSS), 1 in the coming years, the stage-IV wide-field spectroscopic surveys, namely the Dark Energy Spectroscopic Instrument (DESI) [1], Euclid [2], Nancy Grace Roman Space Telescope [3], and SPHEREx [4] will provide highly detailed three-dimensional maps of a large volume of the Universe. These datasets promise to deepen our understanding of early-and late-time Universe by placing stringent constraints on the ΛCDM model and potentially offering discovery space for new physics.…”

Section: Jcap07(2024)068mentioning

confidence: 99%

“…The galaxy densities in real and redshift spaces, denoted as δ g (x) and δ s g (s) respectively, are related to each other as 1 + δ s g (s) = d 3 x (1 + δ g (x)) δ D (s − x − u),…”

Section: Perturbative Modeling Of Nonlinearitiesmentioning

confidence: 99%

“…Thanks to these recent developments, several software packages are now publicly available and have been used to analyze synthetic or real galaxy data. The list includes CLASS-PT [35], 2 PyBird [24], 3 and Velocileptor [36,37]. 4 These codes use slightly different formalisms and are difficult to compare directly with each other.…”

Section: Jcap07(2024)068mentioning

confidence: 99%

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CLASS-OneLoop: accurate and unbiased inference from spectroscopic galaxy surveys

Linde,

Dizgah,

Radermacher

et al. 2024

J. Cosmol. Astropart. Phys.

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The power spectrum is the most commonly applied summary statistics to extract cosmological information from the observed three-dimensional distribution of galaxies in spectroscopic surveys. We present CLASS-OneLoop, a new numerical tool, fully integrated into the Boltzmann code CLASS, enabling the calculation of the one-loop power spectrum of biased tracers in spectroscopic surveys. Built upon the Eulerian moment expansion framework for redshift-space distortions, the implemented model incorporates a complete set of nonlinear biases, counterterms, and stochastic contributions, and includes the infrared resummation and the Alcock-Paczynski effect. The code features an evaluation of the loops by either direct numerical integration or Fast Fourier Transform, and employs a fast-slow parameter decomposition, which is essential for accelerating MCMC runs. After presenting performance and validation tests, as an illustration of the capabilities of the code, we apply it to fit the measured redshift-space halo power spectrum wedges on a ΛCDM subset of the AbacusSummit simulation suite and considering scales up to kmax = 0.3 h/Mpc. We find that the one-loop model adeptly recovers the fiducial cosmology of the simulation, while a simplified model commonly used in the literature for sensitivity forecasts yields significantly biased results. Furthermore, we conduct Monte Carlo Markov Chain (MCMC) forecasts for a DESI-like survey, considering a model with a dynamical dark energy component. Our results demonstrate the ability to independently constrain cosmological and nuisance parameters, even in the presence of a large parameter space with twenty-nine variables.

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Section: Jcap07(2024)068mentioning

confidence: 99%

“…The galaxy densities in real and redshift spaces, denoted as δ g (x) and δ s g (s) respectively, are related to each other as 1 + δ s g (s) = d 3 x (1 + δ g (x)) δ D (s − x − u),…”

Section: Perturbative Modeling Of Nonlinearitiesmentioning

confidence: 99%

See 1 more Smart Citation

CLASS-OneLoop: accurate and unbiased inference from spectroscopic galaxy surveys

Linde,

Dizgah,

Radermacher

et al. 2024

J. Cosmol. Astropart. Phys.

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“…We consider the Nancy Grace Roman Space Telescope High Latitude Spectroscopic Survey. We consider the reference design presented in [47], with a sky fraction f sky = 0.0485 and optimistic dust attenuation. The target galaxies will be measured in the H α and [O III ] bands.…”

Section: • Euclidmentioning

confidence: 99%

Linear Point Standard Ruler: cosmological forecasts for future galaxy surveys. Toward consistent BAO analyses far from a fiducial cosmology

Anselmi¹,

Starkman²,

Renzi³

2022

Preprint

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The linear point (LP) standard ruler was identified as the basis of a purely geometric method for exploiting the Baryon Acoustic Oscillations (BAO). The LP exploits the BAO feature imprinted in the galaxy two-point correlation function to measure cosmological distances independent of any specific cosmological model. We forecast the expected precision of future and ongoing spectroscopic galaxy surveys to measure distances leveraging the linear point. We investigate the cosmological implications of our forecasted results. We focus in particular on a relevant working example: the detection of the late-time cosmic acceleration independent of other cosmological probes. Our findings show that, even within the ΛCDM standard cosmological paradigm, estimated distances need to be reliable over a very wide parameter range in order to realize their maximum utility. This is particularly relevant if we aim to properly characterize cosmological tensions. The LP is a promising candidate approach to achieve this reliability. In contrast, widely employed procedures in BAO analysis estimate distances keeping fixed cosmological parameters to fiducial values close to cosmicmicrowave-background constraints in flat-ΛCDM. It is unclear whether they are purely geometric methods. Moreover, they rely on untested extrapolations to explore the parameter space away from those fiducial flat-ΛCDM values. We recommend that all BAO methodologies be validated across the full range of models and parameters over which their results are quoted, first by means of linear predictions and then N-body simulations.

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“…One of the major parts of the mission is the High Latitude Survey (HLS) with both an imaging and a spectroscopic component (Wang et al 2021). In the current reference imaging survey, Roman would scan over a sky area of 2000 deg 2 in a total time of 1.9 years to produce a sample of galaxies for clustering and weak lensing studies.…”

Section: Roman Space Telescopementioning

confidence: 99%

Cosmology with the Roman Space Telescope -- Synergies with CMB lensing

Wenzl,

Doux,

Heinrich

et al. 2021

Preprint

Self Cite

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We explore synergies between the Nancy Grace Roman Space Telescope and CMB lensing data to constrain dark energy and modified gravity scenarios. A simulated likelihood analysis of the galaxy clustering and weak lensing data from the Roman Space Telescope High Latitude Survey combined with CMB lensing data from the Simons Observatory is undertaken, marginalizing over important astrophysical effects and calibration uncertainties. Included in the modeling are the effects of baryons on small-scale clustering, scale-dependent growth suppression by neutrinos, as well as uncertainties in the galaxy clustering biases, in the intrinsic alignment contributions to the lensing signal, in the redshift distributions, and in the galaxy shape calibration. The addition of CMB lensing roughly doubles the dark energy figure-of-merit from Roman photometric survey data alone, varying from a factor of 1.7 to 2.4 improvement depending on the particular Roman survey configuration. Alternatively, the inclusion of CMB lensing information can compensate for uncertainties in the Roman galaxy shape calibration if it falls below the design goals. Furthermore, we report the first forecast of Roman constraints on a model-independent structure growth, parameterized by 𝜎 8 (𝑧), and on the Hu-Sawicki 𝑓 (𝑅) gravity as well as an improved forecast of the phenomenological (Σ 0 , 𝜇 0 ) model. We find that CMB lensing plays a crucial role in constraining 𝜎 8 (𝑧) at 𝑧 > 2, with percent-level constraints forecasted out to 𝑧 = 4. CMB lensing information does not improve constraints on the 𝑓 (𝑅) model substantially. It does, however, increase the (Σ 0 , 𝜇 0 ) figure-of-merit by a factor of about 1.5.

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The High Latitude Spectroscopic Survey on the Nancy Grace Roman Space Telescope

Cited by 3 publications

References 100 publications

CLASS-OneLoop: accurate and unbiased inference from spectroscopic galaxy surveys

CLASS-OneLoop: accurate and unbiased inference from spectroscopic galaxy surveys

Linear Point Standard Ruler: cosmological forecasts for future galaxy surveys. Toward consistent BAO analyses far from a fiducial cosmology

Cosmology with the Roman Space Telescope -- Synergies with CMB lensing

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