Dark Matter as a Cosmic Bose-Einstein Condensate and Possible Superfluid
Dark Matter as a Cosmic Bose-Einstein Condensate and Possible Superfluid
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暗物质作为宇宙玻色-爱因斯坦凝聚体和可能的超流体
DOI：
10.1023/a:1015934027224
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发表时间：
2002
影响因子：
2.8
通讯作者：
R. Mallett
中科院分区：
文献类型：
--
作者：
M. Silverman;R. Mallett
暗物质是由与引力耦合的中性标量场的自发对称破缺产生的，它包括具有远高于当前背景温度的玻色-爱因斯坦凝聚温度的超低质量玻色子。假设星系晕是由天文尺度的玻色-爱因斯坦凝聚体组成，我们计算了凝聚体的相干长度、转变温度、质量分布和轨道速度曲线，并从仙女座星系和三角座星系观测到的旋转曲线中推导出粒子的质量和数密度。我们还考虑了旋转星系晕中超流行为的可能性，并估计了形成量子涡旋的临界角频率和线密度。
Dark matter arising from spontaneous symmetry breaking of a neutral scalar field coupled to gravity comprises ultra low mass bosons with a Bose-Einstein condensation temperature far above the present background temperature. Assuming galactic halos to consist of a Bose-Einstein condensate of astronomical extent, we calculate the condensate coherence length, transition temperatures, mass distribution, and orbital velocity curves, and deduce the particle mass and number density from the observed rotation curves for the Andromeda and Triangulum galaxies. We also consider the possibility of superfluid behaviour in the halos of rotating galaxies, and estimate the critical angular frequency and line density for formation of quantised vortices.