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Cosmology with the thermal-kinetic Sunyaev-Zel'dovich effect

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William R. Coulton, Atsuhisa Ota, Alexander van Engelen

Cosmology and Nongalactic Astrophysics · Submitted 22 Oct 2019

abstract compiled · 2026-09-23 · no language-model review

The authors' main claim We show that with currently-envisioned CMB missions the tkSZ effect can be detected and can be used to reconstruct large scale velocity fields, with no appreciable bias from either the kSZ effect or other extragalactic foregrounds.

how it is stated · asserted 0.88 read the record →

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arXiv ID1910.10152 (version 1)
Pith IDI6NXD7B5, Pith's permanent record of this paper and its review
CitationAlexander van Engelen, Atsuhisa Ota, William R. Coulton. "Cosmology with the thermal-kinetic Sunyaev-Zel'dovich effect." arXiv:1910.10152 (2019). https://pith.science/paper/I6NXD7B5
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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.

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Compiled by classifier-1.13.0 via TypeSafe API, question bank abstract-p1-20260923, 2026-09-23: 1 request, 6,410 input tokens.

What the abstract itself states, as probabilities: claims first 0.05 · states limitation 0.38 · human participants 0.01 · controlled comparison 0.06 · randomized assignment 0.01 · states quantitative result 0.06 · compares with prior results 0.66 · mentions code or data availability 0.02.

The abstract, sentence by sentence

arXiv listing abstract v1. Results and the main claim are underlined; .

Compton scattering of the cosmic microwave background (CMB) from hot ionized gas produces a range of effects, and the leading order effects are the kinetic and thermal Sunyaev Zel'dovich (kSZ and tSZ) effects. In the near future, CMB surveys will provide the precision to probe beyond the leading order effects. In this work we study the cosmological information content of the next order term which combines the tSZ and kSZ effects, hereafter called the thermal-kinetic Sunyaev Zel'dovich (tkSZ) effect. As the tkSZ effect has the same velocity dependence as the kSZ effect, it will also have many of the useful properties of the kSZ effect. However, it also has its own, unique spectral dependence, which allows it to be isolated from all other CMB signals. We show that with currently-envisioned CMB missions the tkSZ effect can be detected and can be used to reconstruct large scale velocity fields, with no appreciable bias from either the kSZ effect or other extragalactic foregrounds. Furthermore, since the relativistic corrections arise from the well-studied pressure of ionized gas, rather than the gas number density as in the kSZ effect, the degeneracy due to uncertain gas physics will be significantly reduced. Finally, for a very low-noise experiment the tkSZ effect will be measurable at higher precision than the kSZ.

background contribution method result interpretation main claim

What the classifier reports for each sentence. The number is the probability it gave the label.
#sentencerolethe authors' own workstates the main conclusionstrength
s0 Compton scattering of the cosmic microwave background (CMB) from hot ionized gas produces a range of effects, and the leading order effects are the kinetic and thermal Sunyaev Zel'dovich (kSZ and tSZ) effects. background 1.00 0.05 0.02 asserted 1.00
s1 In the near future, CMB surveys will provide the precision to probe beyond the leading order effects. background 0.80 0.04 0.03 asserted 0.65
s2 In this work we study the cosmological information content of the next order term which combines the tSZ and kSZ effects, hereafter called the thermal-kinetic Sunyaev Zel'dovich (tkSZ) effect. contribution 1.00 0.82 0.10 asserted 0.90
s3 As the tkSZ effect has the same velocity dependence as the kSZ effect, it will also have many of the useful properties of the kSZ effect. interpretation 0.60 0.14 0.07 hedged possibility 0.73
s4 However, it also has its own, unique spectral dependence, which allows it to be isolated from all other CMB signals. interpretation 0.34 0.37 0.09 asserted 1.00
s5 We show that with currently-envisioned CMB missions the tkSZ effect can be detected and can be used to reconstruct large scale velocity fields, with no appreciable bias from either the kSZ effect or other extragalactic foregrounds. result 0.99 0.89 0.59 asserted 0.88
s6 Furthermore, since the relativistic corrections arise from the well-studied pressure of ionized gas, rather than the gas number density as in the kSZ effect, the degeneracy due to uncertain gas physics will be significantly reduced. interpretation 0.72 0.44 0.10 asserted 0.87
s7 Finally, for a very low-noise experiment the tkSZ effect will be measurable at higher precision than the kSZ. result 0.89 0.68 0.13 hedged possibility 0.55

What kind of paper the classifier reports this is: theoretical result 0.77 · evidence from argument 0.54.

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not examined
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Every quoted sentence on this record is the authors'. Every label is from Pith's closed vocabulary, with the probability shown beside it. Every number in the measurements table is the authors', checked by code. Record as JSON

The paper
Original abstract

Compton scattering of the cosmic microwave background (CMB) from hot ionized gas produces a range of effects, and the leading order effects are the kinetic and thermal Sunyaev Zel'dovich (kSZ and tSZ) effects. In the near future, CMB surveys will provide the precision to probe beyond the leading order effects. In this work we study the cosmological information content of the next order term which combines the tSZ and kSZ effects, hereafter called the thermal-kinetic Sunyaev Zel'dovich (tkSZ) effect. As the tkSZ effect has the same velocity dependence as the kSZ effect, it will also have many of the useful properties of the kSZ effect. However, it also has its own, unique spectral dependence, which allows it to be isolated from all other CMB signals. We show that with currently-envisioned CMB missions the tkSZ effect can be detected and can be used to reconstruct large scale velocity fields, with no appreciable bias from either the kSZ effect or other extragalactic foregrounds. Furthermore, since the relativistic corrections arise from the well-studied pressure of ionized gas, rather than the gas number density as in the kSZ effect, the degeneracy due to uncertain gas physics will be significantly reduced. Finally, for a very low-noise experiment the tkSZ effect will be measurable at higher precision than the kSZ.

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3 arXiv papers cite this in 3 sentences

Each citing sentence is taken from the citing paper's LaTeX source and typed by Pith's classifier. A label appears at probability 0.8 or more (0.95 for support), a contest at 0.7 or more; the quoted words are the citing authors'. How each label was checked · JSON

Papers citing it · 1 sentence without a confident label

Cites it as support 1 paper
  • They are forecasting the new measurements CMB-HD can deliver, and showing precisely how CMB-HD can push back the boundaries of our knowledge [ref] .

    CMB-HD: Astro2020 RFI Response · Operations and Observation Strategy · 0.99

Cites it as background 1 paper

What it cites · 33 sentences without a confident label

Builds on 1 paper
Uses the method or tool of 12 papers
  • Using the recently proposed kSZ tomography technique [ref] , we show for the first time that the tkSZ effect is detectable via the galaxy-galaxy-tkSZ bispectrum in currently envisioned observational projects such as the Probe of Inflation and Cosmic Origins (PICO) [ref] or CMB-HD experiments [ref] .

    KSZ tomography and the bispectrum · Introduction · 0.91

  • We use the constrained internal linear combination (cILC) method [ref] to do this and to ensure that there is no contamination from the more significant kSZ effect with similar velocity dependence.

    CMB and SZ effect separation with Constrained Internal Linear Combinations · Introduction · 1.00

  • We use the halo model [ref] to compute the non-linear pressure power spectrum $P_pp$, using a modified version hmvec code [hmvec was made by Mathew Madhavacheril and is available at <https://github.com/msyriac/hmvec> ] and with the cluster pressure profiles from Ref. [ref] .

    On the Cluster Physics of Sunyaev-Zel'dovich Surveys II: Deconstructing the Thermal SZ Power Spectrum · Introduction · 0.95

Uses data or values from 2 papers
Cites as background 9 papers
  • In particular, galaxy surveys and high resolution measurements of secondary anisotropies in the cosmic microwave background (CMB) will shed light on new aspects of cosmology [ref] .

    The DESI Experiment Part I: Science,Targeting, and Survey Design · Introduction · 0.97

  • In particular, galaxy surveys and high resolution measurements of secondary anisotropies in the cosmic microwave background (CMB) will shed light on new aspects of cosmology [ref] .

    LSST Science Book, Version 2.0 · Introduction · 0.97

  • In particular, galaxy surveys and high resolution measurements of secondary anisotropies in the cosmic microwave background (CMB) will shed light on new aspects of cosmology [ref] .

    CMB-S4 Science Book, First Edition · Introduction · 0.97

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