Kinetic Sunyaev-Zel’dovich tomography with line-intensity mapping

Sato-Polito, Gabriela; Bernal, José Luís; Boddy, Kimberly K.; Kamionkowski, Marc

doi:10.1103/physrevd.103.083519

Cited by 21 publications

(23 citation statements)

References 47 publications

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“…[50]. Further improvements are likely possible using large, photometric samples, higher n-point functions of the reconstructed velocity field, lower M min values, or foreground tracers, like field galaxies or neutral gas line-intensity maps [198]. Additionally, the combination of kSZ observations with the primary CMB can provide a valuable cross check on CMB and CMB lensing results.…”

Section: Combining Results From Mean Pairwise-velocity Spectra With P...mentioning

confidence: 99%

Ultra-light axions and the kinetic Sunyaev-Zel'dovich Effect

Farren,

Grin,

Jaffe

et al. 2021

Preprint

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Measurements of secondary cosmic microwave background (CMB) anisotropies, such as the Sunyaev-Zel'dovich (SZ) effect, will enable new tests of neutrino and dark sector properties. The kinetic SZ (kSZ) effect is produced by cosmological flows, probing structure growth. Ultra-light axions (ULAs) are a well-motivated dark-matter candidate. Here the impact of ULA dark matter (with mass 10 −27 eV to 10 −23 eV) on kSZ observables is determined, applying new analytic expressions for pairwise cluster velocities and Ostriker-Vishniac signatures in structure-suppressing models. For the future CMB-S4 and ongoing DESI galaxy surveys, the kSZ effect (along with primary anisotropies) will probe ULA fractions ηa = Ωaxion/ΩDM as low as ∼ 5% if ma 10 −27 eV (at 95% C.L.), with sensitivity extending up to ma 10 −25 eV. If reionization and the primary CMB can be adequately modeled, Ostriker-Vishniac measurements could probe values ηa 10 −3 if 10 −27 eV ma 10 −24 eV, or ηa 1 if ma 10 −22 eV, within the fuzzy dark matter window.

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Section: Combining Results From Mean Pairwise-velocity Spectra With P...mentioning

confidence: 99%

Ultra-light axions and the kinetic Sunyaev-Zel'dovich Effect

Farren,

Grin,

Jaffe

et al. 2021

Preprint

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show abstract

“…In the future, our framework can be extended to assess velocity reconstruction using different tracers such as the CIB [54] or intensity maps [35]. Other extensions include velocity reconstruction using reionization kSZ and 21cm maps [58] or reconstruction of the remote quadrupole field [28,92].…”

Section: Discussionmentioning

confidence: 99%

“…Refs. [26,[28][29][30]; other tracers such as spectroscopic surveys [29,30], the Cosmic Infrared Background (CIB) [54], or line-intensity maps [35,55] are other interesting candidates. Throughout the paper, we assume a fiducial cosmological model consistent with Planck 2018 [56]; in particular, we set:…”

Section: Modeling Of Observablesmentioning

confidence: 99%

“…We now consider a tracer of the electron overdensity field, which for the purposes of the present paper we take to be the galaxy overdensity field, measured using a photometric redshift survey. Other tracers such as the redshifted 21cm Hydrogen line (or transitions such as CII) measured by line intensity mapping surveys [35,66], the CIB [54], or the dispersion measure of Fast Radio Bursts [44] have been considered as well. Spectroscopic surveys were considered in Refs.…”

Section: Galaxy Number Countsmentioning

confidence: 99%

“…[28], which relies on the anisotropic crosspower between a galaxy redshift survey and the kSZ component of the CMB. Such a reconstruction can be used as a general-purpose cosmological observable, and is in principle a powerful probe of primordial non-Gaussianity [30], relativistic effects in galaxy surveys [31], modified gravity [32], CMB anomalies [33], and isocurvature perturbations [34,35].…”

Section: Introductionmentioning

confidence: 99%

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Velocity reconstruction with the cosmic microwave background and galaxy surveys

Cayuso¹,

Bloch²,

Hotinli³

et al. 2021

Preprint

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The kinetic Sunyaev Zel'dovich (kSZ) and moving lens effects, secondary contributions to the cosmic microwave background (CMB), carry significant cosmological information due to their dependence on the large-scale peculiar velocity field. Previous work identified a promising means of extracting this cosmological information using a set of quadratic estimators for the radial and transverse components of the velocity field. These estimators are based on the statistically anisotropic components of the cross-correlation between the CMB and a tracer of large scale structure, such as a galaxy redshift survey. In this work, we assess the challenges to the program of velocity reconstruction posed by various foregrounds and systematics in the CMB and galaxy surveys, as well as biases in the quadratic estimators. To do so, we further develop the quadratic estimator formalism and implement a numerical code for computing properly correlated spectra for all the components of the CMB (primary/secondary blackbody components and foregrounds) and a photometric redshift survey, with associated redshift errors, to allow for accurate forecasting. We create a simulation framework for generating realizations of properly correlated CMB maps and redshift binned galaxy number counts, assuming the underlying fields are Gaussian, and use this to validate a velocity reconstruction pipeline and assess map-based systematics such as masking. We highlight the most significant challenges for velocity reconstruction, which include biases associated with: modelling errors, characterization of redshift errors, and coarse graining of cosmological fields on our past light cone. Despite these challenges, the outlook for velocity reconstruction is quite optimistic, and we use our reconstruction pipeline to confirm that these techniques will be feasible with near-term CMB experiments and photometric galaxy redshift surveys.

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Line-intensity mapping: theory review with a focus on star-formation lines

Bernal

Kovetz

2022

Astron Astrophys Rev

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Kinetic Sunyaev-Zel’dovich tomography with line-intensity mapping

Cited by 21 publications

References 47 publications

Ultra-light axions and the kinetic Sunyaev-Zel'dovich Effect

Ultra-light axions and the kinetic Sunyaev-Zel'dovich Effect

Velocity reconstruction with the cosmic microwave background and galaxy surveys

Line-intensity mapping: theory review with a focus on star-formation lines

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