论文标题
7BE在2021年RS OPH爆发中检测
7Be detection in the 2021 outburst of RS Oph
论文作者
论文摘要
Recurrent Nova RS OPH于2021年8月8日发生了新的爆发，达到了可见的亮度v = 4.8 mag。在ESO-VLT的Kueyen-UT2望远镜上，在偏an的Kueyen-UT2望远镜上观察到了2021年爆发的观测，这使得可以检测到在热核失控反应中新鲜制造的7be可能存在。 7BE产量可以在N（BE）/N（H）= 5.7 x 10^（-6）中估计，该单元的收率接近迄今为止经典Novae中最低的收率。 7be是短暂的，只腐烂到7li。通过在变形阶段中采取的频谱，我们估计弹出质量约为1.1 x 10^（-5）MSUN，在2021年事件中创建的7LI的量约为4倍10^（-10）MSUN。 RS OPH类型的复发性可能会使每个事件的7li含量略低于经典Novae，但发生的频率频率高10^倍。复发性的分数在10-30％的范围内，它们可能有助于我们今天观察到的7LI。 RS OPH中7BE的检测为最近的建议提供了进一步的支持：Novae是星系中最有效的7LI来源。
The recurrent nova RS Oph underwent a new outburst on August 8, 2021, reaching a visible brightness of V = 4.8 mag. Observations of the 2021 outburst made with the high resolution UVES spectrograph at the Kueyen-UT2 telescope of ESO-VLT in Paranal enabled detection of the possible presence of 7Be freshly made in the thermonuclear runaway reactions. The 7Be yields can be estimated in N(Be)/N(H) = 5.7 x 10^(-6), which are close to the lowest yields measured in classical novae so far. 7Be is short-lived and decays only into 7Li. By means of a spectrum taken during the nebular phase we estimated an ejected mass of about 1.1 x 10^(-5) Msun, providing an amount of about 4.4x 10^(-10) Msun of 7Li created in the 2021 event. Recurrent novae of the kind of RS Oph may synthesize slightly lower amount of 7Li per event as classical novae, but occur 10^3 times more frequently. The recurrent novae fraction is in the range of 10-30% and they could have contributed to the making of 7Li we observe today. The detection of 7Be in RS Oph provides further support to the recent suggestion that novae are the most effective source of 7Li in the Galaxy.
