论文标题
出色的实验室。 X.新的Cu IV -VII振荡器强度以及在热白矮人中首次检测铜和ins
Stellar laboratories. X. New Cu IV - VII oscillator strengths and the first detection of copper and indium in hot white dwarfs
论文作者
论文摘要
准确的原子数据是计算可靠的非本地热力学平衡（NLTE）模型大气的必不可少的成分，这是热星的光谱分析的必不可少的。我们的目标是在热白矮人（WD）恒星中搜索和识别铜（原子数Z = 29）和insium（Z = 49）的首次光谱线，然后确定其光谱丰度。计算Cu IV-VII的振荡器强度，包括在我们的NLTE模型 - 大气计算中包括Cu的辐射和碰撞结合界限。 IN IV -VI的振荡器强度是从文献中汇编而成的。我们在紫外线（UV）频谱中新发现了1个Cu IV，51 Cu V，2 Cu V，2 Cu VI和5个Cu IV，2 Cu VI和5个。我们分别确定了9.3 x 10 **-5（质量分数，太阳能）和3.0 x 10 ** -5（56 600次太阳能）的光球丰度；我们还发现DA型WD G191-B2B（6.3 x 10 ** -6，9倍太阳能）中的Cu过度浮动。所有已鉴定的RE 0503-289紫外线谱中的Cu IV -VI线与我们新计算的振荡器强度同时再现了。随着CU的检测和RE 0503-289，此非凡的WD中的反铁元素（z> 28）的总数达到了前所未有的18个。
Accurate atomic data is an essential ingredient for the calculation of reliable non-local thermodynamic equilibrium (NLTE) model atmospheres that are mandatory for the spectral analysis of hot stars. We aim to search for and identify for the first time spectral lines of copper (atomic number Z = 29) and indium (Z = 49) in hot white dwarf (WD) stars and to subsequently determine their photospheric abundances. Oscillator strengths of Cu IV - VII were calculated to include radiative and collisional bound-bound transitions of Cu in our NLTE model-atmosphere calculations. Oscillator strengths of In IV - VI were compiled from the literature. We newly identified 1 Cu IV, 51 Cu V, 2 Cu VI, and 5 In Vlines in the ultraviolet (UV) spectrum of DO-type WD RE 0503-289. We determined the photospheric abundances of 9.3 X 10**-5 (mass fraction, 132 times solar) and 3.0 X 10**-5 (56 600 times solar), respectively; we also found Cu overabundances in the DA-type WD G191-B2B (6.3 X 10**-6, 9 times solar). All identified Cu IV - VI lines in the UV spectrum of RE 0503-289 were simultaneously well reproduced with our newly calculated oscillator strengths. With the detection of Cu and In in RE 0503-289, the total number of trans-iron elements (Z > 28) in this extraordinary WD reaches an unprecedented number of 18.
