A UNIVERSAL SFDM HALO MASS FOR THE ANDROMEDA AND MILKY WAY’S DSPHS?
A UNIVERSAL SFDM HALO MASS FOR THE ANDROMEDA AND MILKY WAY’S DSPHS?
复制标题
仙女座和银河系 DSPHS 的通用 SFDM 光环质量？
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
V. Lora
中科院分区：
文献类型：
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作者：
V. Lora
矮球星系是最常见的星系类型，也是宇宙中最暗物质(DM)控制的天体。因此，它们是测试任何DM模型的理想实验室。玻色-爱因斯坦凝聚/标量场DM模型认为DM是由无自旋的超轻粒子组成的，可以用标量场来描述。该模型是Λ-COLD DM模型的替代模型。本文在标量场/BEC暗物质范式下，研究了银河系和仙女座矮球状卫星星系在两个极限下的运动学：当自作用参数为零时，和当自作用参数为≫？我发现具有很高质量/光比(M/L；大于100)的矮球星系更符合纳瓦罗-弗伦克-怀特质量密度剖面。另一方面，具有相对较低的M/L和较高亮度的矮球星系可以用SFDM型模型较好地描述。这样的结果对于进一步测试以矮小星系动力学为工具的替代DM模型是非常令人鼓舞的。
Dwarf spheroidal galaxies are the most common type of galaxies, and are the most dark matter (DM) dominated objects in the universe. Therefore, they are ideal laboratories to test any DM model. The Bose–Einstein condensate/scalar field DM model considers that the DM is composed by spinless-ultra-light particles which can be described by a scalar field. This model is an alternative to the Λ-cold DM model. In this work I study the kinematics of the dwarf spheroidal satellite galaxies of the Milky Way and Andromeda, under the scalar field/BEC dark matter Paradigm in two limits: when the self-interacting parameter is equal to zero, and when the self-interacting parameter is ≫ 1 ?> . I find that dwarf spheroidal galaxies with very high mass-to-light ratios (M/L; higher than 100) are in better agreement with an Navarro–Frenk–White mass density profile. On the other hand, dwarf spheroidal galaxies with relatively low M/L and high luminosities are better described with the SFDM model. Such results are very encouraging to further test alternative DM models using the dynamics of dwarf galaxies as a tool.