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The large scale structure of the universe

The large scale distribution of matter provides one of the principal observables for testing the cosmological model. The inhomogeneity of the distribution of galaxies and dark matter, the dependence of this on the scale, and its time evolution, depend critically on the parameter values of the model. The combination of measurements of the expansion rate of the Universe with those of the rate of growth of density fluctuations, allow, in principle, the basis of the theory to be tested, and also provide a verification of the theory of General Relativity. In fact, there exists the fascinating possibility that dark energy is a manifestation of a modified gravity, that is, a deviation from the Einstein equations. This is currently one of the alternatives to dark energy most actively explored. Along with observation of the cosmic microwave background, the quantitative characterisation of the large scale structure of the Universe via redshift surveys of galaxies and clusters and weak lensing measurements are surely the methods that promise the best results in this field, thanks to the large surveys either underway or planned.

Lake Como Schools on Astrophysics, Cosmology and Gravitation

Jul 08, 2025

Lake Como Schools on Astrophysics, Cosmology and Gravitation It has been held at Como – Villa del Grumello, 23-27 June, the 2025 edition of the “Lake Como Schools on Astrophysics, Cosmology and Gravitation” on the theme “Dark Matter, Dark Energy and the Cosmological Tensions”

The Lucchin Schools Return

Jun 01, 2025

The Lucchin Schools Return First Edition of the New INAF PhD School Series Concludes in Asiago

MISTRAL, a wind of change in the SRT observations

May 29, 2025

MISTRAL, a wind of change in the SRT observations MISTRAL is a new-generation receiver for observations at millimeter wavelengths, built as part of the recent project to upgrade the Sardinia Radio Telescope for the study of the high-frequency radio universe. The main features of this instrument are the very high number of detectors cooled to temperatures close to absolute zero and a dedicated cold optical system, which allow for extremely sharp images. MISTRAL made its “first light” by observing three different celestial objects: the Orion Nebula, the radio lobes of the supermassive black hole in the galaxy M87, and the supernova remnant Cassiopeia A. These images represent the first scientific observations at 90 GHz ever obtained using the SRT