银河系卫星普查。 iii。对银河系卫星星系的观察结果对暗物质特性的限制

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银河系卫星普查。 iii。对银河系卫星星系的观察结果对暗物质特性的限制

Milky Way Satellite Census. III. Constraints on Dark Matter Properties from Observations of Milky Way Satellite Galaxies

论文作者

Nadler, E. O., Drlica-Wagner, A., Bechtol, K., Mau, S., Wechsler, R. H., Gluscevic, V., Boddy, K., Pace, A. B., Li, T. S., McNanna, M., Riley, A. H., García-Bellido, J., Mao, Y. -Y., Green, G., Burke, D. L., Peter, A., Jain, B., Abbott, T. M. C., Aguena, M., Allam, S., Annis, J., Avila, S., Brooks, D., Kind, M. Carrasco, Carretero, J., Costanzi, M., da Costa, L. N., De Vicente, J., Desai, S., Diehl, H. T., Doel, P., Everett, S., Evrard, A. E., Flaugher, B., Frieman, J., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hinton, S. R., Honscheid, K., Huterer, D., James, D. J., Krause, E., Kuehn, K., Kuropatkin, N., Lahav, O., Maia, M. A. G., Marshall, J. L., Menanteau, F., Miquel, R., Palmese, A., Paz-Chinchón, F., Plazas, A. A., Romer, A. K., Sanchez, E., Scarpine, V., Serrano, S., Sevilla-Noarbe, I., Smith, M., Soares-Santos, M., Suchyta, E., Swanson, M. E. C., Tarle, G., Tucker, D. L., Walker, A. R., Wester, W.

论文摘要

我们对银河系（MW）卫星星系进行全面研究，以限制暗物质（DM）的基本特性。该分析完全融合了MW卫星的空间分布和可检测性，并在星系和DM光环之间的映射，MW系统的特性以及MW磁盘上的subhalos中断而在不确定性上进行边缘化。我们的结果与冷，无碰撞的DM范式一致，并在温暖，相互作用和模糊暗物质的粒子模型上产生最强的宇宙学约束。以$ 95 \％$的信心，我们报告了（i）限制的限制，$ m _ {\ rm wdm}> 6.5 \ \ \ \ \ \ \ \ \ mathrm {kev} $（free-streaming length \ Mathrm {kpc} $），（ii）速度与速度独立的DM-Proton散射横截面，$σ_{0} <8.8 \ times 10^{ - 29} \ \ \ \ \ \ \ \ \ \ \ \ \ \ m { \ sillsim（0.3 \ \ m ramrm {gev}）^{ - 2} $）和（iii）fuzzy dm的质量，$ m_2.2.9 \ times 10^{ - 21} \ \ \ \ \ \ \ \ \ \ \ \ \ m roglie wavelengt \ mathrm {kpc} $）。这些限制与DM性质的其他观察性和实验室约束相辅相成。

We perform a comprehensive study of Milky Way (MW) satellite galaxies to constrain the fundamental properties of dark matter (DM). This analysis fully incorporates inhomogeneities in the spatial distribution and detectability of MW satellites and marginalizes over uncertainties in the mapping between galaxies and DM halos, the properties of the MW system, and the disruption of subhalos by the MW disk. Our results are consistent with the cold, collisionless DM paradigm and yield the strongest cosmological constraints to date on particle models of warm, interacting, and fuzzy dark matter. At $95\%$ confidence, we report limits on (i) the mass of thermal relic warm DM, $m_{\rm WDM} > 6.5\ \mathrm{keV}$ (free-streaming length, $λ_{\rm{fs}} \lesssim 10\,h^{-1}\ \mathrm{kpc}$), (ii) the velocity-independent DM-proton scattering cross section, $σ_{0} < 8.8\times 10^{-29}\ \mathrm{cm}^{2}$ for a $100\ \mathrm{MeV}$ DM particle mass (DM-proton coupling, $c_p \lesssim (0.3\ \mathrm{GeV})^{-2}$), and (iii) the mass of fuzzy DM, $m_ϕ> 2.9 \times 10^{-21}\ \mathrm{eV}$ (de Broglie wavelength, $λ_{\rm{dB}} \lesssim 0.5\ \mathrm{kpc}$). These constraints are complementary to other observational and laboratory constraints on DM properties.

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