暗物质引起的恒星振荡

Q1 Earth and Planetary Sciences

Monthly Notices of the Royal Astronomical Society: Letters Pub Date : 2023-09-22 DOI:10.1093/mnrasl/slad133

Jeremy Sakstein, Ippocratis D Saltas

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引用次数: 0

摘要

暗物质由超轻玻色子组成，其集体现象可以描述为经历相干振荡的标量场。例子包括轴子和模糊暗物质模型。在这个超轻暗物质(ULDM)的场景中，场的能量-动量张量源的谐波变化是引力势的一个振荡分量，我们表明它可以共振地激发恒星振荡。建立了预测这些振荡振幅的数学框架，揭示了ULDM主要激发l = 1度的p模态。对共振激发的太阳振荡进行了研究，从中我们得出结论，暗物质引起的太阳振荡可能无法探测到。我们讨论了使用其他恒星物体约束ULDM的前景。

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Dark matter-induced stellar oscillations

ABSTRACT It has been hypothesized that dark matter is comprised of ultra-light bosons whose collective phenomena can be described as a scalar field undergoing coherent oscillations. Examples include axion and fuzzy dark matter models. In this ultra-light dark matter (ULDM) scenario, the harmonic variation in the field’s energy–momentum tensor sources an oscillating component of the gravitational potential that we show can resonantly excite stellar oscillations. A mathematical framework for predicting the amplitude of these oscillations is developed, which reveals that ULDM predominantly excites p-modes of degree l = 1. An investigation of resonantly excited solar oscillations is presented, from which we conclude that dark matter induced oscillations of the Sun are likely undetectable. We discuss prospects for constraining ULDM using other stellar objects.

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来源期刊

Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science

CiteScore

8.80

自引率

0.00%

发文量

136

期刊介绍： For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.