【学术报告】

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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：

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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.

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8月19日