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Measuring the Pairwise Kinematic Sunyaev-Zeldovich Effect with the Atacama Cosmology Telescope e - Eve M. Vavagiakis Cornell University The Sunyaev-Zeldovich Effects e - Adapted from L. Van Speybroeck, UChicago Astro.

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SLIDE 1

Measuring the Pairwise Kinematic Sunyaev-Zel’dovich Effect with the Atacama Cosmology Telescope

e-­‑ ¡

Eve M. Vavagiakis

Cornell University

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SLIDE 2

The Sunyaev-Zel’dovich Effects

1 ¡

  • Thermal SZ effect

(tSZ): ΔT ∝ integrated electron pressure

Eve M. Vavagiakis, Cornell University

ESA and the Planck Collaboration, 2013

Adapted from L. Van Speybroeck, UChicago Astro.

e-­‑ ¡

ACT Collaboration

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SLIDE 3

The Sunyaev-Zel’dovich Effects

1 ¡

  • Thermal SZ effect

(tSZ): ΔT ∝ integrated electron pressure

  • Kinematic SZ effect

(kSZ): ΔT ∝ line of sight momentum

Sudeep Das, UC Berkeley ESA and the Planck Collaboration, 2013

Adapted from L. Van Speybroeck, UChicago Astro.

e-­‑ ¡

ACT Collaboration

Eve M. Vavagiakis, Cornell University

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SLIDE 4

The Sunyaev-Zel’dovich Effects

1 ¡

  • Thermal SZ effect

(tSZ): ΔT ∝ integrated electron pressure

  • Kinematic SZ effect

(kSZ): ΔT ∝ line of sight momentum

Sudeep Das, UC Berkeley ESA and the Planck Collaboration, 2013

Adapted from L. Van Speybroeck, UChicago Astro.

e-­‑ ¡

ACT Collaboration Mittal et al. (2017), in prep.

Eve M. Vavagiakis, Cornell University

slide-5
SLIDE 5

The Sunyaev-Zel’dovich Effects

1 ¡

  • Thermal SZ effect

(tSZ): ΔT ∝ integrated electron pressure

  • Kinematic SZ effect

(kSZ): ΔT ∝ line of sight momentum

Sudeep Das, UC Berkeley ESA and the Planck Collaboration, 2013

Adapted from L. Van Speybroeck, UChicago Astro.

e-­‑ ¡

ACT Collaboration Mittal et al. (2017), in prep.

Eve M. Vavagiakis, Cornell University

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SLIDE 6

2 ¡

Motivation: Pairwise kSZ ¡

  • Massive neutrinos affect growth of structure

Σmv= 1.9 eV ¡ Σmv= 0 eV ¡

  • S. Agarwal, H. Feldman, Mon. Not. R. Astron. Soc. (2011)

Eve M. Vavagiakis, Cornell University

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SLIDE 7

3 ¡

Motivation: Pairwise kSZ ¡

  • Massive neutrinos affect growth of structure
  • kSZ effect probes peculiar velocities at cosmological distances

E.-M. Mueller, F. de Bernardis, R. Bean, M. Niemack (2014), 1412.0592 Hyper-Kamiokande (2015)

Eve M. Vavagiakis, Cornell University

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SLIDE 8

4 ¡

Motivation: Pairwise kSZ ¡

0.120 0.122 0.124 0.126 0.128 Ωmh2 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 P mν

Minimal ΛMDM

Planck kSZ+Planck Planck+len kSZ+Planck+len

−3.0−2.5−2.0−1.5−1.0−0.5 0.0 0.5 1.0 w0

General ΛMDM

−4 −3 −2 −1 1 2 3 4 wa

General ΛMDM

E.-M. Mueller, F. de Bernardis, R. Bean, M. Niemack (2014), 1412.0592

  • Massive neutrinos affect growth of structure
  • kSZ effect probes peculiar velocities at cosmological distances
  • ConstrainΣmv
  • Probe gravity and dark energy
  • With kSZ information from CMB-S4:

Eve M. Vavagiakis, Cornell University

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SLIDE 9

Atacama Cosmology Telescope Polarimeter (ACTPol) Data

ACT Collaboration 5 ¡

  • 6 meter Cosmic Microwave Background

(CMB) telescope

  • Cerro Toco, Atacama Desert, Chile

Eve M. Vavagiakis, Cornell University

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SLIDE 10

Atacama Cosmology Telescope Polarimeter (ACTPol) Data

ACT Collaboration 5 ¡

150 GHz 700 deg2

ACT Collaboration ACT Collaboration

  • 6 meter Cosmic Microwave Background

(CMB) telescope

  • Cerro Toco, Atacama Desert, Chile

Eve M. Vavagiakis, Cornell University

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SLIDE 11

ACT Collaboration 6 ¡

BOSS-SDSS Data

  • F. de Bernardis, S. Aiola, E.M. Vavagiakis, M.D. Niemack (2016), 1607.02139

~68,000 sources 600 deg2 DR11 Galaxies

Eve M. Vavagiakis, Cornell University

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SLIDE 12

ACT Collaboration 6 ¡

BOSS-SDSS Data

Number of sources per redshift bin

~68,000 sources 600 deg2 DR11 Galaxies

  • F. de Bernardis, S. Aiola, E.M. Vavagiakis, M.D. Niemack (2016), 1607.02139

Eve M. Vavagiakis, Cornell University

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SLIDE 13

ACT Collaboration 6 ¡

BOSS-SDSS Data

Previous result: Hand 2012 using DR9

Number of sources per redshift bin

  • Overlaps with ~2.5x as many

sources as used in previous ACT measurement

~68,000 sources 600 deg2 DR11 Galaxies

  • F. de Bernardis, S. Aiola, E.M. Vavagiakis, M.D. Niemack (2016), 1607.02139

Eve M. Vavagiakis, Cornell University

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SLIDE 14

Pairwise Estimator

7 ¡

cij

ij geometrical factor, depends on z.

For each source:

Need optical depth to get velocities!

Sudeep Das, UC Berkeley

Linear differences of temperatures at cluster positions average out other signals:

Eve M. Vavagiakis, Cornell University

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SLIDE 15

8 ¡

  • 4σ measurement of kSZ effect over a

range of luminosity cuts

Results

20000 sources Pairwise momentum, various L cuts Pairwise momentum and best fit model

  • F. de Bernardis, S. Aiola, E.M. Vavagiakis, M.D. Niemack (2016), 1607.02139

Eve M. Vavagiakis, Cornell University

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SLIDE 16

Results

8 ¡

  • 4σ measurement of kSZ effect over a

range of luminosity cuts

  • CMB simulations, jackknife evaluation,

bootstrap estimates

  • Measurement consistent with Planck,

SPT, DES

Binned covariance matrix from simulations 20000 sources Pairwise momentum, various L cuts Pairwise momentum and best fit model

  • F. de Bernardis, S. Aiola, E.M. Vavagiakis, M.D. Niemack (2016), 1607.02139

Eve M. Vavagiakis, Cornell University

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SLIDE 17

9 ¡

Results: Cluster Optical Depths

  • tSZ signal and cluster simulations

could convert pairwise momentum into velocity: necessary for cosmology

Pairwise momentum, various L cuts

  • F. de Bernardis, S. Aiola, E.M. Vavagiakis, M.D. Niemack (2016), 1607.02139

Eve M. Vavagiakis, Cornell University

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SLIDE 18

9 ¡

from tSZ vs. from kSZ

  • tSZ signal and cluster simulations

could convert pairwise momentum into velocity: necessary for cosmology

  • Battaglia (2016) hydrodynamical

simulations extract optical depths from tSZ signal

  • Future: measure optical depths

directly

Results: Cluster Optical Depths

Pairwise momentum, various L cuts

  • F. de Bernardis, S. Aiola, E.M. Vavagiakis, M.D. Niemack (2016), 1607.02139

Eve M. Vavagiakis, Cornell University

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SLIDE 19

Future ¡

  • Upcoming data from ACTPol and Advanced ACTPol

Simons Observatory 10 ¡

ACTPol BOSS North area ~277,000 DR12 sources

ACT Collaboration Eve M. Vavagiakis, Cornell University

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SLIDE 20

Future ¡

Simons Observatory 11 ¡ ACT Collaboration

  • Upcoming data from ACTPol and Advanced ACTPol
  • Improved measurements with CCAT-prime, Simons Observatory, CMB-S4

CCAT-prime:

  • 6m aperture off-axis sub-mm telescope
  • 5600m elevation on Cerro Chajnantor

Vertex Mittal et al. (2017), in prep.

Eve M. Vavagiakis, Cornell University

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SLIDE 21

Future ¡

Simons Observatory 12 ¡ ACT Collaboration

  • Upcoming data from ACTPol and Advanced ACTPol
  • Improved measurements with CCAT-prime, Simons Observatory, CMB-S4

Simons Observatory:

  • Array of several new CMB telescopes
  • 5200m elevation on Cerro Toco in Chile

Eve M. Vavagiakis, Cornell University

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SLIDE 22

13 ¡

Conclusions ¡

Present

  • Pairwise kSZ signal poised to become cosmological tool able to constrain

fundamental physics

  • New CMB maps from ACTPol and AdvACT observations and future

surveys will improve SZ measurements Learn more: CMB-S4 Science Book CMB-S4 Science Book [arXiv:1610.02743] CMB-S4 T CMB-S4 Technology Book echnology Book [arXiv:1706.02464] @SimonsObs

Eve M. Vavagiakis, Cornell University 2025 ¡