Workflow
恒星演化
icon
Search documents
发射无线电波和X射线的天体现身
Ke Ji Ri Bao· 2025-06-04 01:12
Core Findings - A new cosmic phenomenon named ASKAP J1832-0911 has been discovered, emitting radio waves and X-rays every 44 minutes for approximately two minutes, marking the first detection of such a long-period transient (LPT) in X-rays [1][2] - The discovery was made using the ASKAP radio telescope in Australia, and the signals were correlated with data from NASA's Chandra X-ray Observatory, which was observing the same region of the sky at the same time [1] Summary by Sections Discovery and Significance - Since the initial discovery of LPTs by ICRAR researchers in 2022, scientists globally have confirmed 10 such celestial bodies, but the exact cause of these signals and their unique timing remains a mystery [2] - ASKAP J1832-0911 is hypothesized to be a magnetar or a highly magnetized white dwarf in a binary system, yet existing theories do not fully explain the observed phenomena [2] Implications for Research - The detection of this celestial body in X-rays is significant as it opens new avenues for understanding the nature of such objects, emphasizing the importance of interdisciplinary collaboration among global scientists [2] - This breakthrough not only narrows down the potential identities of these celestial bodies but also provides valuable clues for exploring their true nature by requiring explanations for both X-ray and radio wave emissions [2] Broader Context - The discovery of ASKAP J1832-0911 challenges existing theoretical frameworks for understanding the universe and offers new insights into stellar evolution, suggesting that exploration in this field is just beginning [3]
我国科学家用FAST发现罕见掩食脉冲星
news flash· 2025-05-23 09:19
Core Viewpoint - Chinese scientists have discovered a rare millisecond pulsar using the FAST telescope, which orbits another star and is obscured for one-sixth of the time by its companion star. This discovery is significant for the study of stellar evolution and gravitational wave sources in binary star systems [1]. Group 1 - The discovery involves a unique binary star system that is extremely rare and difficult to observe [1]. - The research findings were published in the international academic journal "Science" on May 23 [1]. - The study has important implications for understanding stellar evolution and gravitational waves within the Milky Way [1].
【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]