论文标题
新发现的BE/X射线二进制Swift J004516.6-734703在SMC中：见证了一个情节光盘的出现
The newly discovered Be/X-ray binary Swift J004516.6-734703 in the SMC: witnessing the emergence of a circumstellar disc
论文作者
论文摘要
我们报告了Swift J004516.6-734703的发现，这是Swift SMC调查的BE/X射线二进制系统，S-cubed。发现Swift J004516.6-734703（或SXP 146.6）在2020年6月18日表现出明亮的（〜10^37 erg/s）X射线爆发。Ogle和Swift/uvot的历史紫外线和IR灯库表现出了稳定的亮度，在稳定的亮度上表现出了很长的一段时间，它在2010年的稳定亮度上持续了一段稳定的亮度，这是2019年3月的明亮亮度。这种IR/紫外线上升可能是形成盘的形成的特征，这是通过在盐光谱中存在强Aα线的存在证实，以前尚不存在。 OGLE数据的周期性分析显示出合理的426天二进制期，在X射线中，检测到146.6S时期的脉动周期。 Swift J004516.6-734703的X射线排放发作可能是I型I型爆发的签名，从中子星的第一个Periastron通过新形成的异形盘的伴侣。我们注意到，折光盘的形成始于先前的植物症的预测时间，这表明其形成是由于与中子星的潮汐相互作用而刺激了其形成。
We report on the discovery of Swift J004516.6-734703, a Be/X-ray binary system by the Swift SMC Survey, S-CUBED. Swift J004516.6-734703, or SXP 146.6, was found to be exhibiting a bright (~10^37 erg/s) X-ray outburst in 2020 June 18. The historical UV and IR light-curves from OGLE and Swift/UVOT showed that after a long period of steady brightness, it experienced a significant brightening beginning around 2019 March. This IR/UV rise is likely the signature of the formation of a circumstellar disc, confirmed by the presence of strong a Hα line in SALT spectroscopy, that was not previously present. Periodicity analysis of the OGLE data reveals a plausible 426 day binary period, and in the X-ray a pulsation period of 146.6s period is detected. The onset of X-ray emission from Swift J004516.6-734703 is likely the signature of a Type-I outburst from the first periastron passage of the neutron star companion through the newly formed circumstellar disc. We note that the formation of the circumstellar disc began at the predicted time of the previous periastron passage, suggesting its formation was spurred by tidal interaction with the neutron star.
