致密星吸积物理

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【科技日报】“中国天眼”发现罕见掩食脉冲星
Ke Ji Ri Bao· 2025-05-23 03:44
Core Findings - A rare millisecond pulsar has been discovered based on observations from the "Chinese Sky Eye" (FAST), which orbits a companion star every 3.6 hours, with periodic eclipses lasting 0.6 hours [1][2] - This discovery is significant for understanding stellar evolution theories, compact star accretion physics, and gravitational wave generation mechanisms [1] Group 1: Discovery Details - The discovered pulsar, PSR J1928+1815, has a rotation period of 10.55 milliseconds and was confirmed to have a companion star after six months of tracking [1] - The companion star is unusually massive, comparable to the Sun, but has a very small orbit of only 500,000 kilometers, which is not typical for eclipsing pulsar companions [2] Group 2: Scientific Implications - The findings validate the theory of common envelope evolution in binary star systems, enhancing the understanding of how stars interact and exchange material [2] - The companion star may have accumulated significant material during the common envelope phase, providing insights into neutrino cooling mechanisms [2] - This unique binary system could eventually evolve into a source of gravitational waves, offering new clues for studying gravitational wave generation [2]
中国科学家发现罕见掩食脉冲星
news flash· 2025-05-22 18:03
Core Findings - Chinese scientists have discovered a rare millisecond pulsar that orbits its companion star with a period of 3.6 hours and is obscured by the companion star for one-sixth of the time, akin to an eclipse [1] Group 1 - The discovery was made using the Chinese radio telescope FAST, which highlights advancements in astronomical research capabilities in China [1] - This finding has significant implications for theories of stellar evolution, the physics of compact star accretion, and the study of gravitational wave sources from binary star mergers [1] - The research results were published in the international academic journal "Science" on May 23 [1]