時間：12月30日（周一）下午2：00

地點：多學科416
報告人：紀龍(Eberhard Karls Universit？t, Tübingen)

主持人：陳玉鵬 副研究員
     

題目：吸積脈沖星中輻射壓主導(dǎo)的吸積盤

摘要：X-ray pulsars are highly magnetized neutron stars in binary systems with B ~ 10^12G, fed by accretion of matter from a donor star. The accretion matters lose their angular momentum via the viscosity effect and form a Shakura-Sunyaev accretion disk. The accretion disk is believed to be dominated by gas and radiation pressures in the outer and inner regions, respectively. In accreting X-ray pulsars, due to the strong magnetic field, the accretion disk is generally truncated at a distance far away from the pulsar, which is at a gas pressure dominated region. However recently the presence of the radiation pressure dominated disk is proposed in some sources via different methods. In this talk, I would like to introduce the accretion processes in X-ray pulsars and represent state-of-the-art observational clues of radiation pressure dominated disks