Experimental Astronomy ( IF 2.7 ) Pub Date : 2022-10-21 , DOI: 10.1007/s10686-022-09876-3 Luca Izzo , Paolo Molaro , Piercarlo Bonifacio , Gabriele Cescutti , Massimo Della Valle , Pierluigi Selvelli
Among the main science cases that have motivated the proposal of CUBES, a new high-resolution spectrograph for the Very Large Telescope at the European Southern Observatory, there is the study and the characterisation of the nucleosynthesis of beryllium. Classical novae have been proposed since the ’70s as one of the main factories of lithium in the Galaxy, but this hypothesis has been demonstrated on empirical basis only recently thanks to the direct identification of lithium in V1369 Cen and through the observations of the resonance transition of \(^{7}\)Be II, the \(^{7}\)Li parent, at 313.0 nm in the near-UV range. CUBES is then the ideal instrument to quantify the amount of \(^{7}\)Be and therefore of \(^{7}\)Li produced by the different novae types hosted in the different components of the Milky Way and also in its nearby satellite galaxies. As important by-product of high resolution spectroscopic observations obtained with CUBES, there are the study of the properties of nova ejecta abundances, the shocks evolution in novae and their connection with the high-energy emission observed in these transients, from satellites as Fermi and Swift.
中文翻译:
带有立方体的经典新星
在推动欧洲南方天文台超大望远镜新高分辨率光谱仪 CUBES 提案的主要科学案例中,有铍核合成的研究和表征。自 70 年代以来,经典新星已被提出作为银河系中锂的主要工厂之一,但由于在 V1369 Cen 中直接识别出锂并通过对共振跃迁的观察,这一假设直到最近才在经验基础上得到证实\ ( ^{7}\) Be II,\(^{7}\) Li 母体,在近紫外范围内的 313.0 nm 处。因此,CUBES 是量化\(^{7}\) Be 和因此\(^{7}\)数量的理想工具Li是由银河系不同组成部分及其附近卫星星系中不同类型的新星产生的。作为使用 CUBES 获得的高分辨率光谱观测的重要副产品,研究了新星喷射丰度的特性、新星中的激波演化及其与在这些瞬变中观察到的高能发射的联系,这些瞬变来自费米和卫星等卫星。迅速。