星震学可揭示红巨星内部的强磁场
太阳与恒星天体物理
2015-10-26 v1
摘要
恒星内部磁场无法直接观测，关于其振幅、几何形态和演化所知甚少。我们证明，红巨星核心中的强磁场可通过星震学识别。这些磁场可经由受抑的偶极恒星振荡模式显现，该现象源于磁温室效应，即在恒星核心内散射并捕获振荡模式能量。开普勒卫星已观测到数十颗具有受抑偶极模式的红巨星，我们将其解释为具有强磁化核心的恒星。我们发现大于 的场强可能产生观测到的抑制，且在一个案例中推断出核心场强下限约为 。
引用
@article{arxiv.1510.06960,
title = {Asteroseismology Can Reveal Strong Internal Magnetic Fields in Red Giant Stars},
author = {Jim Fuller and Matteo Cantiello and Dennis Stello and Rafael A. Garcia and Lars Bildsten},
journal= {arXiv preprint arXiv:1510.06960},
year = {2015}
}
备注
Published in Science on October 23, 2015, available at http://www.sciencemag.org/content/350/6259/423.short. This is the authors' version of the manuscript. Authorea version of the paper, including supplementary material, ancillary data and a layman summary, can be found at https://www.authorea.com/83992