In remote nubi di gas, le tracce delle prime stelle
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Created: Thursday, 04 May 2023 10:16

Scoperte le impronte lasciate dall’esplosione delle prime stelle dell’universo in nubi di gas risalenti a 11 miliardi di anni fa, osservate attraverso il Very Large Telescope dell’European Southern Observatory da un team internazionale di cui fanno parte ricercatrici e ricercatori dell'INAF di Trieste e dell'Università di Firenze.
Leggi la news su media INAF.
New evidence for the nature of matter from ancient galaxies in the early Universe
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Created: Wednesday, 29 March 2023 12:36

Astrophysicists in Italy have shed new light on the nature of matter from the James Webb Space Telescope (JWST) galaxy detections 13 billion years ago and novel state-of-the-art numerical simulations of the first galaxies. The study adds another piece to the puzzle of the nature of matter in the Universe.
While the commonly accepted paradigm of structure formation is based on non-relativistic matter that interacts only gravitationally, that is ‘cold’ dark matter, alternative possibilities advocated to solve small-scale problems of the standard scenario rely on the hypothesis that dark matter is made of warm particles that possess a small, non-negligible, thermal velocity, namely ‘warm’ dark matter.
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