SDSS slideshow

Max TegmarkDept. of Physics, MIT

[email protected] en la Playa

January 11-15, 2010

SDSS slideshow

Large-Scale Structure & Surveys

Max Tegmark, MITMax Tegmark, MIT

Midsummer holiday, Leksand, Sweden Midsummer holiday, Leksand, Sweden

Max Tegmark

University of Pennsylvania

Max Tegmark

University of PennsylvaniaWhere I was born and raised Where I was born and raised



January 11-15, 2010

Who are you?

The cosmic plan:• Survey of cosmology basics

• Measuring large-scale structure with galaxy surveys

• Measuring large-scale structure neutral hydrogen

L1:

L3:

L2:

The cosmic plan:• Overview of cosmology theory & observation

- 0th order: cosmic expansion history

- 1st order: cosmic clustering history

- Observational tools: supernovae, CMB, galaxy

clustering, . clusters, lensing, Ly forest, etc

- Predicting large-scale structure

Zaldarriaga,Smoot

L1:

Takada

Liddle

Sunzeff

Crawford

Bean, de la Macorra

Roe



January 11-15, 2010

THE COSMIC SMÖRGÅSBORD

Galaxy surveys

Microwave background

Gravitational lensing

Big Bang nucleosynthesis

Supernovae Ia

Galaxy clusters

Lyman forest

Neutral hydrogen tomography

What have we learned?



January 11-15, 2010

OUR PLACE IN SPACE

DSE

SDSS movie



January 11-15, 2010

OUR PLACE IN TIME

The

sky

as

a ti

me

mac

hine

Dark energy evidence

(Graphics from Gary Hinshaw/WMAP team)

Hot Dense SmoothCool Rarefied

Clumpy

Brief History of our Universe

400

Dark matter creation?

Antimatter annihilation

Creation of atomic nuclei



January 11-15, 2010

Formation movies

Fluctuation generator

Fluctuation amplifier


Clumpy

To 0th order:

Cosmological functions

H(z)


400

386

Fluctuation generator

Fluctuation amplifier


Clumpy

H(z)P(k,z)

To 1st order:


400

386



January 11-15, 2010

Higher order: gastrophysics

0th order: a(t)

1st order: g(z,k)

(Fig

ure

cour

tesy

of

CO

BE

team

)

400

13.7

MeasuringExpansion:

a(t) <=> H(z)

0th order:

100dpiF

igur

e fr

om W

MA

P te

am

100dpiDistant light is

-dimmed-redshifted

100dpi

Distant light is-dimmed-redshifted

Red

shif

t

Dimming

100dpi

Distant light is-dimmed-redshifted

Red

shif

t

DimmingStandard candles, rulers or clocks

QuickTime™ and aYUV420 codec decompressor

are needed to see this picture.

Boomzoom Standardizable candles

(From Saul Perlmutter’s web site)



January 11-15, 2010

Boomzoom

Cosmic strings

Open universe

Inflation with

Inflation without

Using CMB blobs as a standardizable ruler:

Gut

h &

Kai

ser

2005

(Sc

ienc

e) +

WM

AP

3



January 11-15, 2010

Boomzoom

Using galaxy correlations as a standardizable ruler: BAO

Easiest to understand in real space (Bashinsky & Bertschinger, PRL, 87, 1301, 2001; PRD 123008, 2002)

(Eisenstein, Hu & MT 1998; Eisenstein et al 2005; Cole et al 2005)



January 11-15, 2010

Boomzoom

We’ve measured distance to z=0.35 to 5% accuracy

(Eisenstein et al 2005, for the SDSS collaboration astro-ph/050112)

Updates in Reid et al 0907.1659, Percival et al 0907.1660, Kazin et al 2009

Big Bang nucleosynthesis as a standardizable clock:George Gamow 1904-

1968

QuickTime™ and aTIFF (Uncompressed) decompressor




Kir

kman

et a

l 200

3, a

stro

-ph/

0302

006

Big Bang nucleosynthesis as a standardizable clock:George Gamow 1904-

1968





SN Ia+CMB+LSS constraintsYun Wang & MT 2004, PRL 92,

241302

H = dlna/dt, H2

Assumes k=0

a = 1/(1+z)

Inflationary gravitational waves as a standardizable clock:

Qt ~ H/mplanck

SN Ia+CMB+LSS constraintsYun Wang & MT 2004, PRL 92,

241302

Assumes k=0

Vanilla rules OK!

What we’ve learned about H(z) from SN Ia, CMB, BAO, BBN, etc:

• curvature: consistent with vanilla (k = 0)• topology: consistent with vanilla



January 11-15, 2010

1st order: measuring clustering



January 11-15, 2010

History

CMBF

oreg

roun

d-cl

eane

d W

MA

P m

ap f

rom

Teg

mar

k, d

e O

live

ira-

Cos

ta &

Ham

ilto

n, a

stro

-ph/

0302

496



January 11-15, 2010

Boomzoom

z = 1000



January 11-15, 2010

Boomzoom

z = 2.4

Mathis, Lemson, Springel, Kauffmann, White

& Dekel 2001



January 11-15, 2010

Boomzoom

z = 0.8


& Dekel 2001



January 11-15, 2010

Boomzoom


& Dekel 2001

z = 0



January 11-15, 2010

1parmovies

Ly

LSS

Clusters

Lensing

Tegmark & Zaldarriaga, astro-ph/0207047 + updates

CMB



January 11-15, 2010

000619

Galaxy power spectrum measurements 1999(Based on compilation by Michael Vogeley)



January 11-15, 2010

1parmovies

LSS



January 11-15, 2010

1parmovies

LSS

Clusters




January 11-15, 2010

1parmovies

LSS

ClustersCMB


(More from Sarah Church)

History

(Figure from Wayne Hu)

(Figure from WMAP team)

History



January 11-15, 2010

History

CMBF

oreg

roun

d-cl

eane

d W

MA

P m

ap f

rom

Teg

mar

k, d

e O

live

ira-

Cos

ta &

Ham

ilto

n, a

stro

-ph/

0302

496

Why are there anyCMB fluctuations at all?

Why the wiggles? What’s their scale?



January 11-15, 2010

Boomzoom

Cosmic strings

Open universe

Inflation with

Inflation without

Gut

h &

Kai

ser

2005

(Sc

ienc

e) +

WM

AP

3

3



January 11-15, 2010

1parmovies

LSS

ClustersCMB




January 11-15, 2010

1parmovies

Ly

LSS

Clusters


CMB



January 11-15, 2010

Boomzoom Lyman Alpha Forest Simulation: Cen et al 2001

You

Quasar

LyF



January 11-15, 2010

1parmovies

Ly

LSS

Clusters


CMB



January 11-15, 2010

1parmovies

Ly

LSS

Clusters

Lensing


CMB



January 11-15, 2010

GRAVITATIONAL LENSING:A1689 imaged by Hubble ACS, Broadhurst et al 2004



January 11-15, 2010

distortion

Lensing



January 11-15, 2010

1parmovies

Ly

LSS

Clusters

Lensing


CMB



January 11-15, 2010

000619

Galaxy power spectrum measurements 1999(Based on compilation by Michael Vogeley)



January 11-15, 2010

1parmovies

Ly

LSS

Clusters

Lensing


CMB

Documents

SDSS slideshow