By Sébastien Fabbro (auth.), Domingos Barbosa, António José Da Silva, Ana Maria Mourão (eds.)
The previous few years observed the advance of a plethora of experiments and surveys probing the cosmological parameters. The Cosmic Microwave historical past (CMB), the Supernovae (SN) searches and galaxy cluster facts, specifically through X-rays and Sunyaev-Zel'dovich impression, are one of the such a lot prolific giving precise information regarding the geometry, age and constitution formation of the Universe.
The application of the WS-HCP workshop was once aimed toward highlighting the medical achievements and to debate the recent surroundings of "precision cosmology" inside of those 3 probes. the target was once to examine diversified observational suggestions, universal difficulties specifically foregrounds, and to evaluate the effect of observational uncertainties within the decision of key cosmological parameters which describe the primordial universe and the big scale constitution formation mechanism.
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Additional info for 3K, SN’s, Clusters: Hunting the Cosmological Parameters with Precision Cosmology: A JENAM 2002 Workshop Porto, Portugal 3–5 September 2002
1993). Normalising the luminosity is a much more physical picture than simply adjusting the observed magnitudes. The value of SNe Ia as cosmological distance indicators can be attributed to their ability to measure accurate relative distances. Also, they are currently the only distance indicator that can map out a significant redshift range and hence the dynamics of the cosmic expansion. It should be noted that the universality of the normalisation is assumed. g. , 2003) it remains tobe investigated what constitutes the dark energy inferred from the earlier supemova observations (see Riess, 2000 and Leibundgut, 2001 for reviews) and the CMB (Hu and Dodelson, 2002).
LEIBUNDGUT where the strongest signal can be found. , 2003). , 1998) or signatures of higher dimensions, which could modify the effective Friedmann equation (Dvali and Turner, 2003). 5. Conclusions The long believe that SNe Ia could be good standard candles was shattered by the detection of the light curve variations, the exploration of light curves in nearinfrared filters and the continuous discovery of peculiar objects that are classified as SNe Ia. Their spectral evolution is also notasuniform as one would expect from the uniform incineration of a Chandrasekhar-mass white dwarf.
1999) method yield similar corrections with an offset for different normalisations, but with a scatter much larger than the typical errors. , 2001) deviates significantly in its mean corrections. The reasons for these discrepancies have yet to be resolved. It should be noted that the correlations have been mostly determined for the B and V bands, but strong deviations are apparent in all other filter light curves. , 2003). 1 redshift z Figure 1. Hubble diagram for nearby Type Ia supernovae. The upper panel shows the observed peak magnitude.
3K, SN’s, Clusters: Hunting the Cosmological Parameters with Precision Cosmology: A JENAM 2002 Workshop Porto, Portugal 3–5 September 2002 by Sébastien Fabbro (auth.), Domingos Barbosa, António José Da Silva, Ana Maria Mourão (eds.)