5 papers
Simulating galaxy clusters : the ICM and the galaxy populations
Alessio D. Romeo, J. Sommer-Larsen, L. Portinari
Cosmological LambdaCDM TreeSPH simulations of the formation and evolution of galaxy groups and clusters have been performed. The simulations include: star formation, chemical evolu…
Mass-to-Light ratio, Initial Mass Function and chemical evolution in disc galaxies
L. Portinari, J. Sommer-Larsen, R. Tantalo
Cosmological simulations of disc galaxy formation, when compared to the observed Tully-Fisher relation, suggest a low Mass-to-Light (M/L) ratio for the stellar component in spirals…
High Redshift Galaxy Clusters as Probes of Cosmology
Jesper Sommer-Larsen, Martin Gotz
A few, simple and qualitative examples of the potential of galaxy clusters as diagnostics of cosmology are presented. In relation to these we discuss briefly three ongoing or forth…
Cosmic Microwave Background polarization and the ionization history of the Universe
Pavel Naselsky, Jens Schmalzing, Jesper Sommer-Larsen +1
We point out that polarization measurements as planned for the upcoming PLANCK mission can significantly enhance the accuracy of cosmic parameter estimation compared to the tempera…
Constraints on the redshift of reionization from CMB data
Jens Schmalzing, Jesper Sommer-Larsen, Martin Goetz
We use the recent CMB power spectrum measurement by the Maxima experiment (Hanany et al. 2000) to constrain the redshift of reionization z_re. This becomes possible by combining th…