Nuclear stellar discs

doi:10.1007/s00159-025-00163-6

2025-11-06

PRE

M. Schultheis *

Mattia C. Sormani

Dimitri A. Gadotti

DOI：10.1007/s00159-025-00163-6

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我们回顾了当前对核星盘（NSDs）的理解，核星盘是旋转且扁平的恒星结构，存在于早型和晚型星系的中心区域。我们考察了它们的星系统计、动力学、恒星种群、金属丰度梯度和恒星形成历史。我们推导了将核星盘与其宿主星系性质联系起来的标度关系，并将其与核星团的类似关系进行比较。探讨了核星盘与其他中心星系组分（包括核环、核棒和核星团）的关系。强调了核星盘作为棒状星系次级演化的示踪体的作用，着重说明了它们如何用于约束星系棒的性质，例如其年龄。特别关注了银河系的核星盘，其独特的案例研究得益于其近距离以及分辨单个恒星的能力。综述涵盖了银河系核星盘的结构、动力学、动力学和恒星组成，探讨了关于核棒存在性的持续争论以及核棒对中心气体动力学的影响。我们主张核星盘通过原位恒星形成形成，其中大多数是由于棒驱动的气体流入，但在某些情况下可能是在气体丰富的合并期间因外部获取气体而形成。综述最后概述了开放性问题、未来研究方向以及即将到来的观测设施提供的令人兴奋的前景。

Keyword:

Galaxies: nuclei

Galaxies: bulges

Galaxy: center

Galaxy: bulge

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The Astronomy and Astrophysics Review

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Department of Physics

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como lake centre for astrophysics (clap)

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