We introduce the concepts of adiabatic (curvature) and isocurvature (entropy) cosmological perturbations and present their relevance for parameter estimation from cosmic microwave background anisotropies data. We emphasize that, while present-day data are in excellent agreement with pure adiabaticity, subdominant isocurvature contributions cannot be ruled out. We discuss model independent constraints on the isocurvature contribution. Finally, we argue that the Planck satellite will be able to do precision cosmology even if the assumption of adiabaticity is relaxed.

Testing the paradigm of adiabaticity / Trotta, R.; Durrer, R.. - 3:(2006), pp. 1739-1743. (Intervento presentato al convegno Marcel Grossmann Meeting on General Relativity (10th : 2003 : Centro Brasileiro de Pesquisas Físicas) tenutosi a Rio de Janeiro, Brazil, nel 20-26 July 2003) [10.1142/9789812704030_0191].

Testing the paradigm of adiabaticity

Trotta R.;
2006-01-01

Abstract

We introduce the concepts of adiabatic (curvature) and isocurvature (entropy) cosmological perturbations and present their relevance for parameter estimation from cosmic microwave background anisotropies data. We emphasize that, while present-day data are in excellent agreement with pure adiabaticity, subdominant isocurvature contributions cannot be ruled out. We discuss model independent constraints on the isocurvature contribution. Finally, we argue that the Planck satellite will be able to do precision cosmology even if the assumption of adiabaticity is relaxed.
2006
The tenth Marcel Grossmann meeting: on recent developments in theoretical and experimental general relativity, gravitation and relativistic field theories
3
1739
1743
978-981-256-667-6
978-981-270-403-0
World Scientific Publishing Co.
Trotta, R.; Durrer, R.
File in questo prodotto:
File Dimensione Formato  
0402032-2.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 113.79 kB
Formato Adobe PDF
113.79 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/117311
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact