【学术报告】 ～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～ 报告题目： Radio pulsations from LS I +61° 303（LSI +61° 303中的脉冲星） 报告人： 王铂钧博士 报告人单位：北京大学 报告语言： 中文 报告时间： 2022年8月22日（星期一）上午11:20-12:10 报告地点： 1号楼502会议室 报告摘要： ～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～ LS I +61° 303 is one of the rare gamma-ray binaries that emit most of their luminosity in photons with energies beyond 100？MeV. It is well characterized the ~26.5？day orbital period is clearly detected at many wavelengths and other aspects of its multifrequency behaviour make it the most interesting example of its class. The morphology of high-resolution radio images changes with orbital phase, displaying a cometary tail pointing away from the high-mass star component and LS I +61° 303 also shows superorbital variability. A couple of energetic (~10^37？erg/s), short, magnetar-like bursts have been plausibly ascribed to it. Although the phenomenology of LSI +61° 303 has been the subject of theoretical scrutiny for decades, there has been a lack of certainty regarding the nature of the compact object in the binary that has hampered our understanding of the source. Here, using observations with the Five-hundred-meter Aperture Spherical radio Telescope, we report the existence of transient radio pulsations from the direction of LS I +61° 303 with a period P =？269.15508？±？0.00016？ms at a significance of >20σ. These pulsations strongly argue for the existence of a rotating neutron star within LS I +61° 303. ～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～～ 本通知也可以在云台学术报告网页看到： http://www.ynao.cas.cn/xwzx/xstg/ 申请安排学术报告的同事请参见台学术报告管理办法： http://www.ynao.cas.cn/xwzx/xstg/gzzd/ 云台邀请团组：射电天文与VLBI团组、云南天文台青促会小组 邀请方联系人：黄玉祥159 6953 5167 8月19日
