Archivi tag: Cosmic Web

Drifting through the Cosmic Web

The Large Scale Structure of the Universe (LSS) was first discussed at the IAU Symposium No. 79 in 1977 in Tallinn. The title of the Symposium : “The Large Scale Structure of the Universe” , was the first official use of this term (J. Einasto). Since then, it has been of major interest in cosmology. This large scale pattern, emerged from the primordial density fluctuations of dark matter under the effect of gravity, is composed of nodes, filaments and walls surrounding large voids: it is a vast foam-like structure, aka the “cosmic web”, which provides constraints on the content of the universe and the nature of its components. Continua a leggere Drifting through the Cosmic Web

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L’allineamento dei quasar lungo la rete cosmica

Una serie di osservazioni realizzate con il Very Large Telescope (VLT) dell’ESO hanno permesso di rivelare che gli assi di rotazione dei buchi neri supermassicci di un insieme di quasar sono paralleli gli uni agli altri su distanze che raggiungono i miliardi di anni luce. Inoltre, gli astronomi hanno trovato che l’asse di rotazione tende ad essere allineato con le vaste strutture della rete cosmica in cui essi risiedono.

Continua a leggere L’allineamento dei quasar lungo la rete cosmica

IAU308: The Zel’dovich’ Universe – Genesis and Growth of the Cosmic Web

It will be 100 years since the birth of Yakov Zeldovich, whose seminal work paved the way towards a theoretical understanding of the complex weblike patterns that have been observed in our Universe. Impressive progress of observational studies, of modelling and simulations and of analytical work has led to revolutionary new insights into the structure and emergence of the Cosmic Web. With the coming years marked by major observational developments – in terms of large new telescopes, instruments and corresponding versatile surveys – and with the continuing growth of computational resources, the window will be opened towards understanding the dynamics and observing the evolution of cosmic structure. Continua a leggere IAU308: The Zel’dovich’ Universe – Genesis and Growth of the Cosmic Web