D01: Ultimate Physics Analysis

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D01:

Ultimate Physics Analysis

Eiichiro Komatsu

(Max-Planck-Institut für Astrophysik / Kavli IPMU)

“Cosmic Acceleration” Symposium, Tohoku University February 10, 2018

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Why “Ultimate”?

• The aim is to develop a sound analysis method to use all information contained in multiple

data sets

• In practice, we restrict ourselves to quasi- linear regime where the amplitude of

fluctuations is less than unity

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Why “Ultimate”?

• The keyword is “cross-correlations”

• The starting point of D01 is to use all information contained in two-point statistics

• Believe it or not, even this has not been done fully

• We ignore for the moment three-point and higher-order statistics (but see Kayo’s talk)

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D01: The Core Team

I. Kayo

Tokyo Univ. of Tech

K. Takahashi

Kumamoto Univ.

E. Komatsu

• LSS

• Lensing

• LSS

• CMB

• LSS

• 21cm

LSS = Large-scale Structure; CMB = Cosmic Microwave Background

S. Saito MPA / Kavli IPMU

• LSS

• Ly-alpha R. Makiya

• LSS

• Hot Gas

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D01: The Team

I. Kayo

Tokyo Univ. of Tech

K. Takahashi

Kumamoto Univ.

E. Komatsu

• LSS

• Lensing

• LSS

• CMB

• LSS

• 21cm

• LSS

• Hot Gas

加速王者加速王者加速王者

The First “Acceleration Champions”!!

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D01: The Core Team

I. Kayo

Tokyo Univ. of Tech

K. Takahashi

Kumamoto Univ.

E. Komatsu

• LSS

• Lensing

• LSS

• CMB

• LSS

• 21cm

• LSS

• Hot Gas

Joint analysis, fully taking into account the mutual cross-correlation

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Science Goals

• The main scientific motivations for the “ultimate physics analysis” are three-folds:

Falsify the ΛCDM model by ruling out Λ

Detect, or rule out, the inverted mass hierarchy of the neutrino mass by measuring ∑mν<0.1 eV

[95% CL]

Find definitive evidence for inflation by measuring primordial gravitational waves in the CMB

B02,03,04 B01,02,03

B01

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Visible Contributions to B01, 02, and 03

• B01: CMB Sky Simulation Package “GM100”

• Used by the LiteBIRD foreground study group both inside and outside Japan

• B02: Lensing Simulation “lognormal_lens” (Kayo’s talk)

• For detailed study of the synergy between B02 and B03

• B03: Galaxy Simulation “lognormal_galaxies” (published)

• Playing a leading role in shaping up the SSP Cosmology Program of PFS

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LiteBIRD Sky Simulation

B01

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by Hiroaki Kanai (YNU)

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PFS Cosmology Program

B03

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PFS Cosmology Program

B03

D01 contributors

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PFS Cosmology Program

B03

D01 contributors B03 contributors

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Work Horse: “log-normal_galaxies”

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Work Horse: “log-normal_galaxies”

Ryu Makiya / Aniket Agrawal / Shun Saito Chi-Ting Chiang (Stony Brook)

Donghui Jeong (Penn State) (Kavli IPMU/MPA) (MPA) (MPA)

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simulated galaxy map z = 1.5, spring ﬁeld

- top: galaxy map

- left: galaxy power spectrum

Outcomes of log-normal simulation

x [deg]

y [deg]

SSP Cosmology Proposal

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Example Deliverables:

Galaxy Power Spectra

• There are six more redshift bins

by R. Makiya

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[One of the] Expected Main Plot

in the Cosmology Paper!

by R. Makiya

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Synergy: HSC+PFS

B02

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Synergy: HSC+PFS

B02

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PFS galaxies HSC lensing

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PFS galaxies HSC lensing Issha Kayo

(Tokyo Univ. of Tech) Ryu Makiya (Kavli IPMU/MPA)

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Galaxy-shear Cross Spectra

by R. Makiya

S/N=19 S/N=26 S/N=23 S/N=19

S/N=12 S/N=8 S/N=6

SSP Cosmology Proposal Cross-correlating HSC and PFS!

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Testing Modified Gravity

(Weak lensing + Galaxy clustering)

Pengjie Zhang (Shanghai Jiao Tong)

Galaxy-shear corr elation divided by galaxy clustering

General Relativity

“DGP”

braneworld

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PFS galaxies HSC lensing

“GM100”

“LN_galaxies” “LN_lens”

B01

B03 B02

cross!

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Going Beyond Tradition

• A hot, new tool in cosmology:

“intensity mapping”

• The best known example is the intensity mapping using neutral hydrogen lines (21 cm lines)

• Exciting science also with Lyman-alpha intensity mapping

• Coming Soon: “lognormal_im”!

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We also take orders :)

We have a student from

Oxford working on LiteBIRD.

Can we do something interesting?

Jawohl

B01

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B01 D01

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Three-way interaction too!

Do you have an

interesting inflation model that can be tested by

LiteBIRD?

Of course I do!

A01 B01

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Three-way interaction too!

Calculate this

A01 B01

To Takashi Hiramatsu

from Facebook

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Three-way interaction too!

Ask Eiichiro

A01 B01

“Done, but how can we see this in the data?”

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Three-way interaction too!

B01

Jawohl

Ask Eiichiro

“Done, but how can we see this in the data?”

A01

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Three-way interaction too!

A01 B01

Jawohl

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Web App (by T. Hiramatsu)

B01

D01

A01

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We will probably run out of time, but if we do have time left in the end, we would like to hear what we can do for you!