Helioseismology at Birmingham and Queen Mary

伯明翰和玛丽皇后学院的日震学

• 批准号: ST/R000417/1
• 负责人: William Chaplin
• 金额: $ 47.76万
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FR000417%2F1
• 关键词: Helioseismology; Birmingham; Queen; Mary

The Sun is a touchstone for stellar astrophysics. It is an anchor for studies of the internal physics, structure and dynamics of other stars. Understanding what drives the observed changes to its activity and emissions is not only of crucial importance to solar-terrestrial relations, but also has wider relevance to studies of the influence that other stars have on their local environments, with the obvious implications for habitability of detected exoplanets. Prominent among recent solar research have been studies of the current, weak Solar Cycle 24, which has shown low levels of activity that are unprecedented in the era of modern telescope and satellite observations. As we move towards the Cycle 24/25 minimum and into the new cycle, helioseismology has an important role to play in understanding not only the internal drivers for these changes, but also how long-lasting they might be. We will track the seismic behaviour of the Sun through the decline of the current, weak activity cycle into the next solar minimum, using the Birmingham Solar-Oscillations Network (BiSON). We will mine these data and data from other ground-based and space-borne helioseismic instruments, to isolate and extract signatures of structural and dynamic changes in interior. Using our BiSON data we will also have the first ever opportunity to conduct a seismic comparison of one full 22-year Hale cycle with another. We will also utilize resolved-Sun data from satellites and the ground-based GONG network to monitor the development of near-surface flow patterns as we head into Cycle 25, and to study the internal rotation and composition of the solar envelope.Our other major focus relates to the now well established solar-abundance or solar modelling problem, i.e., the continuing disagreement of the structures of models constructed using updated chemical abundance determinations with the Sun (as determined by helioseismology). We will provide new constraints on the physics of the deep solar interior, in particular on the extent to which astrophysical opacities and non-standard physics might help to resolve the problem, exploiting the leading expertise of our consortium in modelling stellar interiors. This is an example of solar research that has important implications for the wider domain of stellar astrophysics.

太阳是恒星天体物理学的试金石。它是研究其他恒星内部物理、结构和动力学的锚。了解是什么驱动了观测到的其活动和排放的变化，不仅对日地关系至关重要，而且对研究其他恒星对其当地环境的影响也具有更广泛的意义，对探测到的系外行星的可居住性具有明显的影响。在最近的太阳研究中，突出的是对当前较弱的第24太阳活动周的研究，该活动周的活动水平较低，这在现代望远镜和卫星观测时代是前所未有的。随着我们走向第24/25周期的最小值并进入新的周期，日震学不仅在理解这些变化的内部驱动因素方面发挥着重要作用，而且还可以了解它们的持续时间。我们将使用伯明翰太阳振荡网络（野牛）跟踪太阳的地震行为，通过当前的弱活动周期下降到下一个太阳活动极小期。我们将挖掘这些数据和其他地面和空间太阳地震仪器的数据，以分离和提取内部结构和动态变化的特征。利用我们的野牛数据，我们还将首次有机会对一个完整的22年黑尔周期与另一个周期进行地震比较。我们也将利用卫星和地面GONG网络提供的解析太阳数据，在我们进入第25个太阳活动周期时监测近地表流动模式的发展，并研究太阳包层的内部旋转和组成。我们的另一个主要重点是现在已经确立的太阳丰度或太阳模型问题，即，使用最新的太阳化学丰度测定（由日震学测定）构建的模型结构持续不一致。我们将提供新的限制物理学的太阳内部深处，特别是在何种程度上天体物理学的不透明性和非标准物理学可能有助于解决这个问题，利用我们的财团在建模恒星内部的领先专业知识。这是太阳研究的一个例子，对更广泛的恒星天体物理学领域具有重要意义。

项目成果

Asteroseismic constraints on active latitudes of solar-type stars: HD 173701 has active bands at higher latitudes than the Sun

星震对太阳型恒星活动纬度的限制：HD 173701在比太阳更高的纬度处具有活动带

• DOI: 10.1093/mnras/stz672
• 发表时间: 2019
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Cunha M

Stellar Surface Magneto-convection as a Source of Astrophysical Noise. II. Center-to-limb Parameterization of Absorption Line Profiles and Comparison to Observations

恒星表面磁对流作为天体物理噪声的来源。

• DOI: 10.3847/1538-4357/aaddfc
• 发表时间: 2018
• 期刊: The Astrophysical Journal
• 作者: Cegla H

Combining multiple structural inversions to constrain the solar modelling problem

结合多个结构反演来约束太阳建模问题

• DOI: 10.1051/0004-6361/201833971
• 发表时间: 2019
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Buldgen G

The Sun as a Guide to Stellar Physics

太阳作为恒星物理学的指南

• DOI: 10.1016/b978-0-12-814334-6.00004-2
• 发表时间: 2019
• 作者: Basu S

Modelling stochastic signatures in classical pulsators

• DOI: 10.1093/mnras/staa125
• 发表时间: 2020-01
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: P. Avelino;M. Cunha;W. Chaplin