Enabling Grids for Escienc E The ZEN project
Enabling Grids for E-scienc. E The ZEN project A. Tilquin Centre de Physique des Particules de Marseille www. eu-egee. org EGEE-II INFSO-RI-031688 EGEE and g. Lite are registered trademarks
Determination of cosmological parameters Enabling Grids for E-scienc. E • Scientific Goal: Address open questions of fundamental cosmology: dark matter/dark energy sector and primordial universe • Main people involve: ANR program CPPM Alain Bonnissent, Anne Ealet, Dominique Fouchez, Lei Sun, Diane Talon-Esmieu, Charling. Tao CEA Philippe. Brax, Jean Batiste Melin, Christophe. Yèche, Dominique. Yvon, Nathalie Palanque. Delabrouille, Alexandre. Réfrégier, Jim. Rich CPT Christian. Marinoni, Pierre Taxil, Jean-Marc Virey, Stefan. Linden LAL Francois Couchot, Olivier Perdereau, L. Perotto, S. Plaszczynski , C. Rosset FCPPL: Franco-China-Particle-Physics-Laboratory program IHEP/PKU/NAOC/Tsinghua U/Beijing Normal U. ZHANG Xin. Min, ZHAO Gongbo , QIAN Zuxuan , XIA Junqing, FAN Zuhui, LI Hong , Zhu Zhong, QIN Bo, DENG Jinsong , CHAO Wu , ZHOU Xu , WANG Xiaofeng EGEE-II INFSO-RI-031688 To change: View -> Header and Footer 2
Plan Enabling Grids for E-scienc. E • • Few words about cosmology and dark energy How to characterize dark energy Statistical method and datagrid Results already obtained by the Chinese and French groups (ESR and Euchina) • Prospective EGEE-II INFSO-RI-031688 To change: View -> Header and Footer 3
Some words about cosmology Enabling Grids for E-scienc. E • Cosmology based on: Homogenous and isotropic Universe General relativity: G = 8 GT Energy content: = / c Equation of state: w(z)=p/ Matter ( m) : w =0 Radiation ( r) : w = 1/3 Cosmological cste ( ): w=-1 Dark energy ( X) : w(z) T = m + r + X EGEE-II INFSO-RI-031688 ( c=10 -29 g/cm 3) To change: View -> Header and Footer 4
Some words about dark energy Enabling Grids for E-scienc. E • In 1998, the Supernova Cosmology Project and High-z team shown that high red-shift supernovae are fainter than expected: a new energy component is needed. Dark energy or cosmological constant caracterized by reduce density: = / c For a flat Universe: Z Definition: = / c ( c=10 -29 g/cm 3) EGEE-II INFSO-RI-031688 To change: View -> Header and Footer 5
SNe Ia From observations to the Concordance Model Enabling Grids for E-scienc. E CMB(WMAP) Universe is mainly dark LSS ~70% DE and ~25% DM. Our Univers is accelerating EGEE-II INFSO-RI-031688 a 2006 status To change: View -> Header and Footer 6
Phenomenological aspect Enabling Grids for E-scienc. E • From where this acceleration is coming from ? • Two main classes of theory/model : Particle physics or Gravity ? General relativity Particle Gravity physics Acceleration is due to new New dominant In allfields cases: weekly couple to fields over matter at z=0 New non dominant fields. EGEE-II INFSO-RI-031688 Modification of gravity Long range force induced by light field modification of the Matière gravitation: CDM, gravity+violation of the g g standard New fields are needed équivalence principle: Tensorquintessence, topological scalar theory, cameleon model, default, Chaplygin Gaz…. runaway …(w<-1) Dark energy can always beendilaton described by an New fieldsequation are non dominant effective of state: Differents type of gravitons, Matière ->expansion rate is masseless or (i) not : extra g g standard unchanged. Coupling with= w standard dimensions, multi brane, w=p/ +w z/(1+z) 0 a photons-> apparent modif. of multigravite, brane induced A the dynamic: oscillations gravity, simulated gravity… photon/axions in B -> négative energy… a To change: View -> Header and Footer 7
Enabling Grids for E-scienc. E How to extract w 0, wa? Degeneracies between parameters imply multi-probes analysis sensitive to complementary quantities: CMB Snapshot at ~400, 000 yr, viewed from z=0 Angular diameter distance to z~1000 Growth rate of structure (from ISW) Supernovae Standard candle Luminosity distance Cosmic Shear Evolution of dark matter perturbations Angular diameter distance Growth rate of structure Cluster counts Evolution of dark matter perturbations Angular diameter distance Growth rate of structure Baryon Wiggles Angular diameter distance EGEE-II INFSO-RI-031688 To change: View -> Header and Footer 8
Physical parameters Enabling Grids for E-scienc. E • Important number of parameters, cosmological and astrophysical – b/ m density for baryon/matter – density for neutrino’s – T curvature density – H Hubble constant, – ns spectral index, – reionisation optical depth – 8 normalization for CMB, WL and BAO. – ms normalization for SNIa. – yhe Helium fraction – w 0, wa Equation of state…. • Efficient statistical tools needed: – Bayesian statistic and MCMC : Chinese and astrophysicist choice – Frequentist statistic and datagrid : French and particle physicist choice EGEE-II INFSO-RI-031688 To change: View -> Header and Footer 9
Statisitcal method Enabling Grids for E-scienc. E • Statistic based on 2( i, w 0, wa, …) • Minimum using the gradient method: 2/ i=0 • Numerical resolution and iterative: • Error computation: • Contour: Solving the equation 2 = 2 min +s 2 Marginalization obtained by minimization: 2(w 0, wa) = 2 min( i | w 0, wa) • The contour is constructed by minimizing the 2 on a grid of points (minimum 20*20) and iso- 2 are constructed using interpolation. Each point (20 hours of computing) is calculated on a CE. A simple contour requires about 1 year of CPU on a single CPU. Thanks to datagrid (result in few days) EGEE-II INFSO-RI-031688 To change: View -> Header and Footer 10
The Zen program Enabling Grids for E-scienc. E Minuit (ROOT library) Global Configuration file Fichier de Configuration CMB Fichier de Configuration BAO Zen. cc Configurator Minimizeur CMB code CMB 2 BAO code BAO 2 Minimum 2 and parameters EGEE-II INFSO-RI-031688 To change: View -> Header and Footer 11
Submission graphical interface Enabling Grids for E-scienc. E • A run is a set of n*n jobs (400) send in parallel. A graphical interface has been developed (thanks to Zuxuan Qian) to construct and submit them. • Global configuration files • Zen programs configuration • Submit jobs on datagrid EGEE-II INFSO-RI-031688 To change: View -> Header and Footer 12
Job control graphical interface Enabling Grids for E-scienc. E • Jobs monitoring and output data manager • Get jobs status • Kill or submit jobs Get log and error files Manage output file Check output results and update jobs status EGEE-II INFSO-RI-031688 To change: View -> Header and Footer 13
Cosmological constraint using BAO Enabling Grids for E-scienc. E • First results using datagrid within: – ESR (Earth Science Research) VO (thanks to M. Petit-Didier) and Euchina Virtual organization – Using SN+CMB+BAO with frequentist statistic and (BAOfit from Sun Lei, PKU-CPPM Join Ph. D) Riess 2006: SNLS 1+HST+new calib. Data CDM Diane Talon-Esmieu ESR: 40000 hours of CPU EGEE-II INFSO-RI-031688 ESR+Euchina: 10000 hours of CPU To change: View -> Header and Footer 14
Summary and perspectives Enabling Grids for E-scienc. E • The ZEN program is now running on datagrid Thanks to ESR virtual organization • The two graphical interfaces are very powerfull tools to submit jobs and to debug. • Major problem is still the linux version (SL 3, SL 4) • Our first results on multi-probes analysis are compatible with competitive analysis (Bayesian) • Perspectives: – – – Add new probes (WL) and wait for new data (PLANCK, SNLS 3) Investigate new theoretical models and implement them in ZEN Add new statistics (MCMC, Bayesian…) Optimize the speed Start systematic analysis EGEE-II INFSO-RI-031688 To change: View -> Header and Footer 15
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