The eyes of the James Webb Space Telescope (JWST) have “observed” one Great Disco Star Systemdating from the original universe. It is an unexpected discovery, the result of the work of a research group coordinated by Weichen Wang and Sebastiano Cantalupo, respectively granting research and complete professor to the Physics Department of the PhysicsUniversity of Milan-Bicocca. Until today, in fact look atprimordial The JWST had detected much smaller galactic records than we are used to observing in the local universe. However, the award -identified galaxy would be over Three times bigger Earlier, galaxies with star mass and similar cosmic times discovered. The studio has just been published on Nature Astronomy.
A look at the past
‘When and how galactic records are formed, it is still a mystery in modern astronomy – says Cantalupo – The first years of observations of the James Webb Space Telescope revealed an abundance of galactic records in the original universe, which corresponds to a cosmic era of Eleven billion years ago, or two billion years after the big bang. Before our observation, however, only galactic records were discovered by JWST much smaller From those we see in the local universe. For this reason, it has been thought so far that the formation of the largest data had requested most of the age of the universe“.
To investigate this theme, the authors and authors of the study analyzed a series of data collected by the JWST, with regard to a region of the air found 11-12 billion years of light from us And that is included in a structure that is likely to evolve into a stack of galaxies. It is a very special area of the universe, characterized by oneHigh concentration of galaxies, gas and black holes.
The new discovered disk system
‘Use the data of two tools – explains Wang – the Near infrared camera and the Near-infrared spectrographer On board the JWST we have identified the galaxies within this hyperdensive region“. Then the researchers analyzed morphology and characteristics until they identify a surprisingly large galaxy that they decided to call “Big Wheel” (panoramic wheel), precisely because of its enormous size. “Big Wheel is about three times larger than the previously discovered galaxies with star mass and similar cosmic times, and at least it is also Three times larger than the current cosmological simulations – continues Wang – Instead, it is comparable to the size of most massive records that are seen in the current universe“. Further spectroscopic analyzes then confirmed that Big Wheel is a record that runs when one runs spiral galaxyThat is, just like the Melkweg, the galaxy that houses us.
The rapid and early growth of this disco star system could deal with theEspecially a dense environment In which it is located, the authors assume, even if further data will be used to confirm this option. “Exceptionally dense environments such as the one who houses the large wheel, remain a relatively unexplored area – concludes Cantalupo – Further targeted observations are needed for Build a statistical sample of gigantic records in the original universe and thus open a new window at the initial phase of the formation of the galaxies“.
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