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

Abstract

The Nancy Grace Roman Space Telescope will conduct a High Latitude Spectroscopic Survey (HLSS) over a large volume at high redshift, using the near-IR grism (1.0-1.93 $\mu$m, $R=435-865$) and the 0.28 deg${}^2$ wide field camera. We present a reference HLSS which maps 2000 deg${}^2$ and achieves an emission line flux limit of 10${}^{-16}$ erg/s/cm${}^2$ at 6.5$\sigma$, requiring $\sim$0.6 yrs of observing time. We summarize the flowdown of the Roman science objectives to the science and technical requirements of the HLSS. We construct a mock redshift survey over the full HLSS volume by applying a semi-analytic galaxy formation model to a cosmological N-body simulation, and use this mock survey to create pixel-level simulations of 4 deg${}^2$ of HLSS grism spectroscopy. We find that the reference HLSS would measure $\sim$ 10 million H$\alpha$ galaxy redshifts that densely map large scale structure at $z=1-2$ and 2 million [OIII] galaxy redshifts that sparsely map structures at $z=2-3$. We forecast the performance of this survey for measurements of the cosmic expansion history with baryon acoustic oscillations and the growth of large scale structure with redshift space distortions. We also study possible deviations from the reference design, and find that a deep HLSS at $f_{\mathrm{line}}>7\times 10^{-17}$erg/s/cm${}^2$ over 4000 deg${}^2$ (requiring $\sim$1.5 yrs of observing time) provides the most compelling stand-alone constraints on dark energy from Roman alone. This provides a useful reference for future optimizations. The reference survey, simulated data sets, and forecasts presented here will inform community decisions on the final scope and design of the Roman HLSS.

29 pages, 8 figures, ApJ submitted

References in corpus (38)

• Dark Energy and the Accelerating Universe
• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report
• A test of the nature of cosmic acceleration using galaxy redshift distortions
• A primer on hierarchical galaxy formation: the semi-analytical approach
• The redshift dependence of the structure of massive LCDM halos
• The spin and shape of dark matter haloes in the Millennium simulation of a LambdaCDM universe
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon acoustic oscillations with Lyman-$\alpha$ forests
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic correlation function between redshifts 0.6 and 1
• The Clustering of the SDSS Main Galaxy Sample II: Mock galaxy catalogues and a measurement of the growth of structure from Redshift Space Distortions at $z=0.15$
• A fitting formula for the merger timescale of galaxies in hierarchical clustering
• The high redshift galaxy population in hierarchical galaxy formation models
• On the final spin from the coalescence of two black holes
• A 2.5% measurement of the growth rate from small-scale redshift space clustering of SDSS-III CMASS galaxies
• HiZELS: a high redshift survey of H-alpha emitters. I: the cosmic star-formation rate and clustering at z=2.23
• The Wide Field Infrared Survey Telescope: 100 Hubbles for the 2020s
• Ram pressure stripping of disc galaxies orbiting in clusters. I. Mass and radius of the remaining gas disc
• The darkness that shaped the void: dark energy and cosmic voids
• Primordial non-Gaussianity, scale-dependent bias, and the bispectrum of galaxies
• Wide-Field InfraRed Survey Telescope (WFIRST) Final Report
• Simulating nonlinear cosmological structure formation with massive neutrinos
• Differentiating dark energy and modified gravity with galaxy redshift surveys
• Detecting Neutrino Mass by Combining Matter Clustering, Halos, and Voids
• The GIGANTES dataset: precision cosmology from voids in the machine learning era
• Five-percent measurements of the growth rate from simulation-based modelling of redshift-space clustering in BOSS LOWZ
• Maximal compression of the redshift space galaxy power spectrum and bispectrum
• Predicting Hα emission line galaxy counts for future galaxy redshift surveys
• Geometrical compression: a new method to enhance the BOSS galaxy bispectrum monopole constraints
• Linear bias and halo occupation distribution of emission line galaxies from Nancy Grace Roman Space Telescope
• HST Grism-derived Forecasts for Future Galaxy Redshift Surveys
• Exploring the NRO Opportunity for a Hubble-sized Wide-field Near-IR Space Telescope -- NEW WFIRST
• Accreting Black Holes
• James Webb Space Telescope Optical Simulation Testbed I: Overview and First Results
• The WFIRST Galaxy Survey Exposure Time Calculator
• An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data
• Cold Mode Accretion in Galaxy Formation

Cited by in corpus (52)

• DESI 2024: Reconstructing Dark Energy using Crossing Statistics with DESI DR1 BAO data
• Extreme Value Statistics of the Halo and Stellar Mass Distributions at High Redshift: are JWST Results in Tension with ΛCDM?
• Breaking degeneracies in the first galaxies with clustering
• The Aemulus Project V: Cosmological constraint from small-scale clustering of BOSS galaxies
• The Evolving Effect Of Cosmic Web Environment On Galaxy Quenching
• Constraining the spatial curvature with cosmic expansion history in a cosmological model with a non-standard sound horizon
• $\mathrm{S}\mathrm{IM}\mathrm{BIG}$: Mock Challenge for a Forward Modeling Approach to Galaxy Clustering
• Timing the r-Process Enrichment of the Ultra-Faint Dwarf Galaxy Reticulum II
• Cosmological Information in Skew Spectra of Biased Tracers in Redshift Space
• A Joint Roman Space Telescope and Rubin Observatory Synthetic Wide-Field Imaging Survey
• Cosmological forecasts for future galaxy surveys with the linear point standard ruler: Toward consistent BAO analyses far from a fiducial cosmology
• Dust Echoes from Luminous Fast Blue Optical Transients
• Prospects for 21cm-Galaxy Cross-Correlations with HERA and the Roman High-Latitude Survey
• Detectability of Wandering Intermediate-Mass Black Holes in the Milky Way Galaxy from Radio to X-rays
• CSST large-scale structure analysis pipeline: I. constructing reference mock galaxy redshift surveys
• DIGS: Deep Inference of Galaxy Spectra with Neural Posterior Estimation
• Extragalactic Science with the Experiment for Cryogenic Large-aperture Intensity Mapping
• Mapping reionization bubbles in the JWST era I: empirical edge detection with Lyman alpha emission from galaxies
• Detecting Population III Stars through Tidal Disruption Events in the Era of JWST and Roman
• Subtracting the kinetic Sunyaev-Zeldovich effect from the cosmic microwave background with surveys of large-scale structure
• Interacting Models of Dark Energy and Dark Matter in Einstein scalar Gauss Bonnet Gravity
• Detecting galaxy-21-cm cross-correlation during reionization
• The ASTRID Simulation at z=0: From Massive Black Holes to Large-scale Structure
• Radio-optical synergies at high redshift to constrain primordial non-Gaussianity
• Fisher forecast for the BAO measurements from the CSST spectroscopic and photometric galaxy clustering
• Prospects for disentangling dark matter with weak lensing
• Model-Independent Dark Energy Measurements from DESI DR2 and Planck 2015 Data
• Probing Large Scale Ionizing Background Fluctuation with Lyman $\alpha$ Forest and Galaxy Cross-correlation at z=2.4
• Non-Gaussian assembly bias from a semi-analytic galaxy formation model
• Leveraging cross-correlations and linear covariance-based filtering for line-intensity map reconstructions at linear scales
• $H_0$ Without the Sound Horizon (or Supernovae): A 2% Measurement in DESI DR1
• Cosmology with voids from the Nancy Grace Roman Space Telescope
• LATIS: Comparing Galaxy and IGM Tomography Maps as Tracers of Large-scale Structure and Protoclusters at $z\sim 2.5$
• Phenomenological power spectrum models for H$\alpha$ emission line galaxies from the Nancy Grace Roman Space Telescope
• Self-calibrating BAO measurements in the presence of Small Displacement Interlopers
• Modelling the covariance matrix for the power spectra before and after the BAO reconstruction
• Simulating continuum-based redshift measurement in the \textit{Roman's} High Latitude Spectroscopy Survey
• COSMOS2025: Machine Learning Classification of Early- and Late-type Galaxies at 0 < z < 3
• Microlensing Signatures of Dyson Sphere-like Structures around Primordial Black Holes as Technosignatures of Extraterrestrial Advanced Civilizations
• A New Framework to Detect Multi-Messenger Signals from Bright Sporadic Stochastic Gravitational Wave Background
• Quantifying Weighted Morphological Content of Large-Scale Structures via Simulation-Based Inference
• Parity-odd Four-Point Correlation Function from DESI Data Release 1 Luminous Red Galaxy Sample
• Differentiable Fuzzy Cosmic-Web for Field Level Inference
• The Redshifts from 122 Bands: Comparative Redshift Forecast for Low-Resolution Spectra from SPHEREx and 7-Dimensional Sky Survey (7DS)
• Euclid preparation. 3D reconstruction of the cosmic web with simulated Euclid Deep spectroscopic samples
• Cosmology with the Roman Space Telescope -- Synergies with CMB lensing
• Solving small-scale clustering problems in approximate lightcone mocks
• A Non-parametric Method for the Inference of Halo Occupation Distributions
• DeepVoid: A Deep Learning Void Detector
• Estimating the completeness of the QUBRICS Survey with 3501 QSO redshifts from Gaia DR3 spectra
• A lightcone catalogue from the Millennium-XXL simulation: improved spatial interpolation and colour distributions for the DESI BGS
• Implications of the cosmological 21-cm absorption profile for high-redshift star formation and deep JWST surveys