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The PLANCK mission & on behalf of the PLANCK collaboration Cécile Renault Laboratoire de Physique Subatomique et de Cosmologie Grenoble - France from CMB to cosmology COBE : T 3K & large scale anisotropies  hot BB

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The planck mission l.jpg

The PLANCK mission &

on behalf of the

PLANCK collaboration

Cécile Renault

Laboratoire de Physique Subatomique et de Cosmologie

Grenoble - France


From cmb to cosmology l.jpg
from CMB to cosmology

  • COBE : T3K & large scale anisotropies  hot BB

  • Balloons & ground-based experiments : intermediate scale fluctuations  inflation

  • WMAP : large to med. scale T & large scale TE anisotropies  concordance model

  • Planck will measure large to small scale T & E anisotropies & constrain B-mode fluctuations

  • Precision cosmology,

  • new physics ?

Planck 1 year

5 x 5 deg. Field

T anisotropies

WMAP 2 years

WMAP 8 years

94 GHz - 15’ FWHM

217 GHz - 5’ FWHM

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


T power spectra l.jpg

WMAP 4 years

Planck - 15 months

designed to be cosmic variance limited across essentially the entire primary MB T anisotropy power spectrum

Blue book simulations

T Power spectra

From pure CMB maps

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


E power spectra l.jpg

WMAP 5 years Nolta et al 2008

Blue book simulations

Detailed history of reionization & tests of adiabaticity to high precison

E Power spectra

From pure CMB maps

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


B mode sensitivity l.jpg
B-mode sensitivity

From pure CMB maps

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Cmb as a powerful tool l.jpg
CMB as a powerful tool

  • CMB = picture of the Universe ~ 380,000 years after BB

  • temperature predicted by the BB model

  • propertiesstrongly linked to inflation :

    • perturbation generation mechanism

    • ~ scale invariance

    •  ~ 1 predicted

  • Enough information to check most of the hypotheses

  • all sky  isotropy checked

  • known linear physics predicts the distribution  gaussianity checked

  • large leverage redshift distribution when combined with other observables (clusters, supernovae …) to check structure evolution

  • Link between cosmology & high energy physics

  • sound speed at recombination  Universe content

  • neutrinos mass

  • footprint of the energy scale of inflation

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Need for accuracy l.jpg
Need for accuracy

Blue Book simulations

Comparing concordance CDM model with ns = 0.95 and no run (solid line) and same ns (at fiducial wave number k0 = 0.5 Mpc-1) and run dns/dln k = -0.03

TOP :

—model with no running index

·simulated observations with running index

 deviations from a pure scale invariant power spectrum would provide a firm probe of the dynamics of an inflationary period

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Cosmological parameters l.jpg

bh2ch2 ns nrunlog[1010As] H0

Cosmological parameters

main parameters : better than %

Precision predictions & measurements  tests of new physics become possible

Blue book simulations

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Instrumental challenges planck solutions l.jpg

  • low temperature instrument  similar sensitivity per 20’ pixel for WMAP 8 years @ 70 K and Planck low frequency 1 year @ 20 K

  • or for WMAP 1 year @ 70 K and Planck high freq. 12 hours @ 0.1 K

  • high redundancy for noise reduction and systematic effects monitoring

  • large spectral leverage

  • from 30 to 857 GHz for efficient separation of Galactic emission, from synchrotron to dust

Instrumental challenges & Planck solutions

  • Tiny signal  “equivalent to the thermal emission from a rabbit living on the Moon, as seen from Earth, with a human being close to the detector”

  • T  E  B : signals decreased by orders of magnitude

  • Significant additive signals from foregrounds

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Bonus a wealth of unique data l.jpg

Secondary

anisotropies

+ follow-up with Herschel

Extra-galactic srcs

Milky Way

Solar system

Bonus : a wealth of unique data !

  • Measurement of the Sunyaev-Zeldovich effect in > 104 galaxy clusters

  • gravitational lensing effect

  • Radio galaxies, BL Lac objects, quasars

  • Low and high redshift dusty galaxies

  • Bulk velocities on scales > 300 Mpc

  • Far-infrared background fluctuations

  • Evolution of clusters up to z > 1

  • Dust & gas distribution in the Milky Way

  • Dust properties, cloud & cirrus morphology

  • Star forming regions, cold molecular clouds

  • Galactic magnetic field from synchrotron and dust emission

  • Study of planets

  • Measurements of hundreds of asteroids, comets

  • zodiacal light

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


The planck mission11 l.jpg
The Planck mission

  • 1m50 ø telescope

  • up to 5’ resolution

  • Designed for large focal plane and minimal intrinsic polarization

  • 2 instruments :

  • Low Frequency Instrument

  • 30 to 70 GHz @ 20 K

  • High Frequency Instrument

  • 100 to 857 GHz @ 0.1 K

Sensitivity of 2 10-6T/ T

ESA mission : first European satellite dedicated to CMB study

HFI PI : J.-L. Puget (France)

LFI PI : N. Mandolesi (Italy)

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Low frequency instrument l.jpg
Low Frequency Instrument

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


High frequency instrument l.jpg
High Frequency Instrument

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


The focal plane l.jpg

Estimated Instrument Performance Goals

Credits : ESA- AOES medialab

The focal plane

The HFI plate (100 to 857 GHz) is surrounded by

LFI horns (30 to 70 GHz)

20 K

0.1 K

In 10-6

In 10-6

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


The scanning strategy l.jpg

Credits: ESA

Scanning direction

Focal plane geometry (on the sky) allows easier systematic effects correction already at the hour scale

The scanning strategy

From the L2 Lagrange point

30 to 50 times the same circle,

then shift of a third of the smallest beam

 full sky survey in 7 months

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


New but experienced technology l.jpg

CMB map

(1 deg.smoothed)

I map at 353 GHz

Q map at 353 GHz

New but experienced technology

LFI  WMAP

HFI Archeops 

balloon-borne experiment - 12 hour flight

Bolometers @ 0.1 K - 143 to 545 GHz

polarized channel @ 353 GHz

February 7th 2002 flight

all references on www.archeops.org

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Data processing releases l.jpg
Data processing & releases

  • Computational challenge :

  • up to ~1010 points in the time stream

  • 5 107 pixels per map

    Hybrid approaches allow to obtain in a reasonable time the most accurate results reducing the conceptual simplifications to a minimum.

  • Removing systematic effects

  • Separating the different components

  • Calibrated timelines

  • Maps per frequency

  • Maps per component

  • Compact source catalogue

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Planck is on the way l.jpg
Planck is on the way …

  • Final assembly @Alcatel alenia space

  • Spring 2008 : last tests at CSL Liege

  • Required levels confirmed by calibration campaigns

Then launch on Ariane 5 wih Herschel,

scheduled for October 31st 2008

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Slide19 l.jpg

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Slide20 l.jpg

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


The cryogenic system l.jpg
The cryogenic system

0.1 K plate (HFI)

Main mirror

50 K

1.6 K

intermediate

stage

Instruments

18 & 0.1 K

shields

50-60 K

(passive cooling)

Service module

300 K

He3

He4

He4

He4

LFI @ 18 K - HFI @ 0.1 K

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


The telescope l.jpg

Credits : ESA

The telescope

  • off-axis aplanic design

  • 2 elliptical reflectors

  • 1.5 m projected 

  • optimized for a large focal plane & minimal intrinsic polarization

    Operational T ~ 50 K

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


Launch orbit l.jpg

to the L2 Lagrange point

in the Earth shadow

Launch & orbit

Common launch with Herschel from Kourou by Ariane V

Scheduled for summer 2008

Herschel

Planck

Cécile Renault “Rencontres de Moriond” on Cosmology March, 17th, 2008


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