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arXiv 1012.1553astro-ph.CO
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暗物质主要是轴子BEC

The dark matter is mostly an axion BEC

Pierre Sikivie

摘要:

轴子不同于普通的冷暗物质,如WIMP或无菌中微子,因为它们形成玻色-爱因斯坦凝聚体(BEC)。结果,在星系晕上吸积的轴子会以净整体旋转的方式落入。相反,普通CDM以无旋速度场吸积到星系晕上。在这两种情况下,内焦散是不同的。它表明,如果暗物质是轴子,孤立的盘状星系,如银河系的晕的相空间结构,正是存在的观测支持的焦散环模型。其他的暗物质候选者预测星系晕的相空间结构要混乱得多。

英文摘要:

Axions differ from ordinary cold dark matter, such as WIMPs or sterile neutrinos, because they form a Bose-Einstein condensate (BEC). As a result, axions accreting onto a galactic halo fall in with net overall rotation. In contrast, ordinary CDM accretes onto galactic halos with an irrotational velocity field. The inner caustics are different in the two cases. It is shown that if the dark matter is axions, the phase space structure of the halos of isolated disk galaxies, such as the Milky Way, is precisely that of the caustic ring model for which observational support exists. The other dark matter candidates predict a far more chaotic phase space structure for galactic halos.

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。

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