1. Coherent analysis of CMB anisotropies CMB, structures and Foregrounds
Marian Douspis
Nabila Aghanim, Mathieu Langer
(IAS - Orsay)
Douspis, Aghanim & Langer A&A, 2006

2. Power spectrum of temperature @ small scales compared to
Observations
Power spectrum of temperature
anisotropies
Power excess
@ small scales compared to
primary CMB

3. Micro-Waves Sky Primary Anisotropies (CMB)
Secondary Anisotropies (SZ [Thermal])
Extra-galactic sources (IR, radio)
Galactic Emissions
Released data are “cleaned” from galactic and
extra-galactic signal (resolved sources)
1st hypothesis: Excess = SZ effect

4. Previous works Fix cosmology (CP) with signal @
Choose a SZ spectrum (from one simulation)
Add primary CMB and  £ SZ(n)
Ampl.  given by fit of
Deduce the SZ
(Bond et al., Goldstein et al., Kuo et al., Redhead et al., wmap3)
Ignores the inherent link between
SZ spectrum and cosmological parameters
Need coherent analyse to estimate the SZ contrib.

5. Computation of the SZ spectrum
SZ emission of a single cluster for a hot gas distribution in a NFW profile of DM
Choose a mass function (Jenkins) to compute the cluster number counts on the sky (dn/dM)
Integrate over the sky (Komatsu & Seljak)
C.P. appear in the computation of the SZ spectrum

6. SZ Spectrum
(WMAP 1st year)

7. SZ Contribution 1/2 degeneracies Need for a coherent analysis
8 high , n high
degeneracies
Need for a
coherent analysis

8. SZ Contribution 2/2 1st coherent determination of the SZ contribution
Any room for an additional contribution ?

9. Residual Point Sources
In each experiment scales)
some contributions from unresolved point sources
(IR/radio) with Flux  Detection threshold remain
Model: (poissonian distribution)
to be added to CMB+SZ spectra
(Bi are new free parameters in the fit)

10. Residual point sources spectrum
1 contribution/spectrum of source by experiment

11. Point sources contribution 1/3
l<1500
l<10000
Including SZ and PS:
Cosmology in agreement with concordance model obtained at large scales

12. Point sources contribution 2/3
SZ(150) ~ 5 %
PS(acbar)~ 35%
SZ(30) ~ 15 %
PS(bima)~ 5%
SZ(30) ~ 10 %
PS(cbi) ~ 40%
@l=2000

13. Contribution sources ponctuelles 3/3
Comparison with point sources studies?
Agreement with:
Toffolatti et al.
If PS contribution supposed ?:
cosmology OK

14. Conclusions Tools developped for a coherent approach
of the CMB and LSS
(Primary/secondaries/extragalactic sources)
Determination of SZ and PS contributions
as a function of for each experiment
(s8, Bni )
Analysis needed for future data analysis
(better error bars, intercalibration)
Improvements needed as well
(running, lensing, dependency in cluster f)

15. Thank you for your attention Thank you for your invitation
&
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