“中国天眼”发现罕见掩食脉冲星

Core Findings - Chinese scientists discovered a rare millisecond pulsar PSR J1928+1815 in the Milky Way using the "China Sky Eye," which is obscured by its companion star for one-sixth of its time, and the companion star's mass is significantly higher than typical companion stars of eclipsing pulsars [1][2][3] Group 1: Scientific Significance - The discovery of PSR J1928+1815 is crucial for studying stellar evolution, compact star accretion, and gravitational wave sources from binary star mergers [1][3] - The unique characteristics of this pulsar and its companion star provide valuable observational data for understanding the common envelope evolution of binary star systems [2][3] Group 2: Characteristics of the Pulsar and Companion Star - PSR J1928+1815 has a rotation period of 10.55 milliseconds and orbits its companion star with a period of 3.6 hours, with the companion star having a mass of at least one solar mass [2] - The companion star is inferred to be a high-temperature helium star, and the pulsar's signal obscuration is caused by the stellar wind material ejected from the helium star [3]