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中国天眼联手南非阵列望远镜高精度观测银河系球状星团 刷新观测极限
Yang Shi Wang· 2025-05-26 02:41
Group 1 - The collaboration between Tsinghua University and international astronomers has successfully created a clearer magnetic field map of the Milky Way by utilizing the FAST and MeerKAT telescopes, providing new insights into star cluster evolution and the Milky Way's magnetic field [1][3] - Globular clusters, among the oldest celestial bodies in the Milky Way, consist of millions of stars, including highly magnetized pulsars that emit precise electromagnetic signals, carrying valuable information about interstellar matter and magnetic fields [3][6] - The joint observation effort has resulted in the measurement of polarization rotation for 43 pulsars across 8 globular clusters, which is a key indicator of cosmic magnetic field strength, revealing that 7 of the clusters lack detectable ionized gas, indicating an unusually "clean" environment [6][7] Group 2 - The term "dust-free realm" has been coined to describe the exceptionally clean environment of these ancient celestial bodies, raising new questions about how globular clusters have maintained such cleanliness over billions of years [6][7] - Future collaborations will focus on tracking pulsar mutations, studying interstellar turbulence, and even exploring potential signals from extraterrestrial civilizations [7]
最新观测数据揭示银河系古老天体“秘密”
Ke Ji Ri Bao· 2025-05-21 00:50
Group 1 - The research conducted by Tsinghua University and international astronomers utilized the FAST and MeerKAT telescopes to perform a high-precision pulsar polarization survey of globular clusters, providing the most comprehensive measurements of magnetic field gradients and ionized gas limits to date [1] - The study observed 43 pulsars across 8 globular clusters, doubling the global sample size and creating a clearer map of the Milky Way's magnetic field [1] - The findings were published as a cover article in the journal "Science Bulletin" on May 20 [1] Group 2 - The research revealed that, apart from 47 Tucanae, other globular clusters lacked detectable ionized gas, contradicting theoretical models that predicted significant gas presence [2] - This unexpected finding suggests the existence of effective gas-clearing mechanisms within globular clusters, potentially driven by strong radiation winds from white dwarfs and young stars [2] - The results challenge existing theories of globular cluster evolution, prompting a reevaluation of current models [2]