arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1508.04773gr-qcastro-ph.COastro-ph.SRhep-phhep-th
收藏

恒星吸积暗物质

Accretion of dark matter by stars

Richard Brito, Vitor Cardoso, Hirotada Okawa

摘要:

对暗物质印记的探测是当前研究中最活跃的领域之一。我们在这里集中在光场的质量$m_B$,如轴子和轴子的候选人。利用微扰技术和成熟的非线性数值相对论方法,我们证明了:(i)暗物质可以堆积在恒星中心,导致以f= $2.5 10^{14}$ $m_B c^2$ /eV Hz的倍数频率振荡的构型和几何。这些配置是稳定的,在整个参数空间的大部分,并产生了可靠的暗物质捕获机制。玻色子核的恒星也可能在其他具有有效质量耦合的理论中发展,例如(无质量)标量张量理论。我们还表明,(ii)崩溃的主机恒星的黑洞是避免有效的引力冷却机制。

英文摘要:

Searches for dark matter imprints are one of the most active areas of current research. We focus here on light fields with mass $m_B$, such as axions and axion-like candidates. Using perturbative techniques and full-blown nonlinear Numerical Relativity methods, we show that (i) dark matter can pile up in the center of stars, leading to configurations and geometries oscillating with frequency which is a multiple of f=$2.5 10^{14}$ $m_B c^2$/eV Hz. These configurations are stable throughout most of the parameter space, and arise out of credible mechanisms for dark-matter capture. Stars with bosonic cores may also develop in other theories with effective mass couplings, such as (massless) scalar-tensor theories. We also show that (ii) collapse of the host star to a black hole is avoided by efficient gravitational cooling mechanisms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑