阿塔卡马大型毫米波阵列(ALMA)望远镜
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最新天文观测发现稳定棒状结构星系 可追溯至宇宙大爆炸后26亿年
Zhong Guo Xin Wen Wang· 2025-05-22 06:17
Core Insights - The research published in the journal "Nature" reveals that the J0107a galaxy, observed when the universe was only 2.6 billion years old, exhibits a stable bar structure, which is unexpected for young galaxies [1][2] - The study indicates that bar structures, typically found in large galaxies, can form much earlier than previously thought, occurring within 500 million years after the Big Bang [1][2] Group 1 - The J0107a galaxy is identified as a large-scale barred spiral galaxy, where the bar structure facilitates the rearrangement of the galaxy by drawing gas into the center, leading to bursts of star formation, particularly in young galaxies [2] - Observations show that the rate of gas inflow in J0107a is 10 to 100 times faster than in similar systems like the Milky Way, suggesting that barred spiral galaxies should be more unstable, yet the stars in J0107a indicate it has existed for a long time [2] - The findings suggest that bar-driven galaxy evolution occurred as early as 11.1 billion years ago, providing new insights into the cosmic rearrangement of young galaxies [2]