AlH lines in the blue spectrum of Proxima Centauri

AlH lines in the blue spectrum of Proxima Centauri
复制标题

比邻星蓝色光谱中的 AlH 线

DOI:
10.1093/mnras/stac2588
复制
发表时间:
2022
影响因子:
4.8
通讯作者:
Pavlenko Y
Pavlenko Y
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Pavlenko Y

文献摘要

参考文献

被引文献

相似文献

最近计算的AlH同位素的ExoMol线列表用于分析Proxima Cen(M5.5 V)的蓝色光谱(4000-4500 nm)。通过比较观测谱和计算谱,可以识别出A1-X1-X+带系中大量的27条AlH谱线:AlH谱线在1-0、0-0和1-1带的光谱范围内占主导地位。我们揭示了扩散性质的过渡接近的解离极限,出现在越来越宽的形式(高达5 μ m)和浅(连续混淆极限)AlH线的配置文件。预测的波长的AlH扩散线系统位移。预解离状态的线轮廓上的增宽的效果包括通过增加辐射阻尼率高达5个数量级。通过比较观测到的恒星光谱和合成的恒星光谱,我们确定了许多干净的0-0 Q分支跃迁的阻尼率的经验值。我们发现我们的阻尼率和文献中提供的寿命之间的良好协议。27 Al 1H ExoMol和REALH光谱的比较表明,ExoMol谱线列表更好地描述了观察到的光谱。在Proxima Cen光谱中搜索26 Al 1H线没有发现任何显著的特征;给出的上限为27 Al 1H/26 Al 1H>100。
The recently computed ExoMol line lists for isotopologues of AlH are used to analyse the blue spectrum (4000–4500 Å) of Proxima Cen (M5.5 V). Comparison of the observed and computed spectra enables the identification of a large number of27AlH lines of the A1Π –X1Σ+band system: The spectral range covering 1-0, 0-0, and 1-1 bands are dominated by clearly resolved AlH lines. We reveal the diffuse nature of transitions close to the dissociation limit which appears in the form of increasingly wider (up to 5 Å) and shallower (up to the continuum confusion limit) AlH line profiles. The predicted wavelengths of AlH diffuse lines are systematically displaced. The effect of broadening by predissociation states on the line profiles is included by increasing the radiative damping rate by up to 5 orders of magnitude. We determine empirical values of damping rates for a number of the clean 0-0 Q-branch transitions by comparing the observed and synthetic stellar spectra. We find excellent agreement between our damping rates and lifetimes available in the literature. A comparison of27Al1H ExoMol and REALH spectra shows that the observed spectrum is better described by the ExoMol line list. A search for26Al1H lines in the Proxima Cen spectrum does not reveal any notable features; giving an upper limit of27Al1H /26Al1H >100.
通过特洛伊木马法测量天体物理能量下的 27Al(p,α)24Mg 反应
DOI: 10.7566/jpscp.31.011056
发表时间: 2020
期刊: International journal of radiation applications and instrumentation. Part B, Nuclear medicine and biology
影响因子: --
作者:
S. Palmerini;M. Cognata;L. Acosta;R. Alba;E. Chávez;S. Cherubini;G. D’ Agata;A. Pietro;P. Figuera;K. D. L. Ríos;G. Guardo;M. Gulino;S. Hayakawa;G. Kiss;M. Commara;L. Lamia;C. Maiolino;G. Manicó;M. Mazzocco;J. Mrázek;C. Parascandalo;T. Petruze;D. Pierroutsakou;R. Pizzone;G. Rapisarda;S. Romano;D. Santonocito;R. Spartá;C. Spitaleri;A. Tumino
通讯作者: A. Tumino
物理学 der Sternatmosphären: Mit besonderer Berücksichtigung der Sonne
DOI: 10.1007/978-3-642-50754-0
发表时间: 1938
期刊: International journal of radiation applications and instrumentation. Part B, Nuclear medicine and biology
影响因子: --
作者:
A. Unsöld
通讯作者: A. Unsöld
模型大气代码:ATLAS12 和 ATLAS9
DOI: 10.1007/978-3-319-06956-2_4
发表时间: 2014
期刊: International journal of radiation applications and instrumentation. Part B, Nuclear medicine and biology
影响因子: --
作者:
R. Kurucz
通讯作者: R. Kurucz
DOI: 10.1016/0021-9614(80)90157-3
发表时间: 1980
期刊: The Journal of Chemical Thermodynamics
影响因子: --
作者:
M. L. Mcglashan
通讯作者: M. L. Mcglashan