Three approaches for the classification of protoneutron star oscillation modes
Three approaches for the classification of protoneutron star oscillation modes
复制标题
原中子星振荡模式分类的三种方法
DOI：
10.1093/mnras/stad1459
复制
发表时间：
2023
影响因子：
4.8
通讯作者：
Radice, D.
中科院分区：
文献类型：
--
作者：
Rodriguez, M. C.;Ranea-Sandoval, Ignacio F.;Chirenti, C.;Radice, D.
未来对银河系核心塌陷超新星引力波（GW）的探测将提供有关原中子星（PNS）内部物理的信息。在这项工作中，我们对 PNS 非径向振荡模式应用了三种不同的分类方法：Cowling 分类、广义 Cowling 命名法 (GCN) 和基于模态属性的分类 (CBMP)。使用核心塌陷超新星 3D 模拟的 PNS 模型，我们发现在 PNS 演化的早期阶段，通常是反弹后 0.4 秒，Cowling 分类不一致，但 GCN 和 CBMP 提供了补充信息，有助于理解模式的演化。在 GCN 中，我们注意到模式频率在早期演化时出现了几个避免的交叉，而 CBMP 则跟踪避免交叉的模式。我们验证了 PNS 最强的 GW 发射对应于 GCN 中的 f 模式，这表明模式捕获区域在每次避免交叉时在核心和包络之间交替。随后，大约在反弹后 0.4 秒，三种分类方法对模式谱进行了类似的描述。我们使用我们的结果根据 PNS 模式的分类来测试 PNS 模式的普遍关系，并发现 f 和 p 模式的普遍关系在 CBMP 中的行为非常简单。
The future detection of gravitational waves (GWs) from a Galactic core-collapse supernova will provide information on the physics inside protoneutron stars (PNS). In this work, we apply three different classification methods for the PNS non-radial oscillation modes: Cowling classification, Generalized Cowling Nomenclature (GCN), and a classification based on modal properties (CBMP). Using PNS models from 3D simulations of core-collapse supernovae, we find that in the early stages of the PNS evolution, typically 0.4 s after the bounce, the Cowling classification is inconsistent, but the GCN and the CBMP provide complementary information that helps to understand the evolution of the modes. In the GCN, we note several avoided crossings as the mode frequencies evolve at early times, while the CBMP tracks the modes across the avoided crossings. We verify that the strongest emission of GWs by the PNS corresponds to the f mode in the GCN, indicating that the mode trapping region alternates between the core and the envelope at each avoided crossing. At later times, approximately 0.4 s after the bounce, the three classification methods present a similar description of the mode spectrum. We use our results to test universal relations for the PNS modes according to their classification and find that the behaviour of the universal relations for f and p modes is remarkably simple in the CBMP.
DOI：
10.1007/978-981-16-4306-4_2
发表时间：
2022
期刊：
--
影响因子：
--
作者：
Dooley K
通讯作者：
Dooley K