Supply time05/25/2024 06:00
Worldwide analysis group: “Stars type in impartial hydrogen 400 to 600 million years after the Huge Bang”
(Seoul = Yonhap Information) Reporter Jooyoung Lee = NASA’s James Webb Area Telescope (JWST) has discovered that younger stars fashioned when chilly, impartial atomic gasoline coalesced within the early universe, lower than 600 million years after the seize of the galaxies.
Think about the formation of galaxies within the early universe
The formation of galaxies in a universe the place clear and opaque gasoline combined, simply a whole lot of hundreds of thousands of years after the Huge Bang. Commentary knowledge from NASA’s James Webb Area Telescope (JWST) exhibits that chilly, impartial hydrogen gasoline is being pulled into the galaxy. [NASA, ESA, CSA, Joseph Olmsted (STScI) 제공. 재판매 및 DB 금지]
A world analysis staff led by Professor Kasper Heinz from the Niels Bohr Institute on the College of Copenhagen, Denmark, analyzed knowledge from the JWST remark within the scientific journal Science on the twenty fifth and located that chilly impartial gasoline, primarily hydrogen, has agglomerated within the universe 13.3 to 13.4 billion years in the past and the celebs had been energetic They introduced that that they had found three galaxies that had been forming.
Professor Heinz mentioned: “Beforehand, JWST confirmed the primordial galaxy on the superior stage of evolution, however this time we instantly witnessed the beginning of a galaxy, that’s, the creation of the primary star system within the universe.”
On this research, the analysis staff carefully analyzed JWST Close to-Infrared Spectrograph (NIRSpec) remark knowledge on 12 galaxies within the early universe positioned greater than 13 billion light-years away.
Three galaxies had been actively forming stars between 13.3 and 13.4 billion years in the past, utilizing a mannequin that analyzes how mild from galaxies is absorbed by impartial gasoline in and round galaxies to tell apart gasoline from newly forming galaxies from different gasoline discovered.
These galaxies look like surrounded by chilly, impartial gasoline consisting solely of hydrogen and helium, the primary parts of the universe.
The analysis staff mentioned that JWST’s near-infrared remark gear was very delicate and was capable of detect an unusually great amount of chilly impartial atomic gasoline surrounding galaxies, and that this gasoline might have been the gasoline for the formation of latest stars within the galaxy.
Instantly after the Huge Bang, the universe was an enormous opaque mass of gasoline composed of hydrogen atoms, and the gasoline between stars and galaxies was opaque, not like as we speak’s house stuffed with twinkling stars.
The gasoline in the whole universe grew to become fully clear solely a billion years after the Huge Bang, and the celebs within the galaxy contributed to the transparency by heating and ionizing the encompassing gasoline.
Professor Heinz mentioned: “The primary found galaxies are like glittering islands in a sea of opaque, impartial gasoline,” and added: “With out JWST, it might have been inconceivable to look at the primary galaxies or acquire insights into the method of galaxy formation. “.
Professor Darach Watson, co-author of the paper, mentioned: “Evaluation of the JWST knowledge confirmed that almost all of those galaxies are composed of younger stars. The truth that their environment are like enormous reservoirs of gasoline means that Most galaxies have not had sufficient time to type stars.” .
◆ 출처: Science, Kasper E. Heintz et al., ‘Robust damping of Lyman-α absorption in younger star-forming galaxies at redshift 9 to 11’, www.science.org/doi/10.1126/science.adj0343
scitech@yna.co.kr
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05/25/2024 06:00 Posted
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