论文标题
通过NGC4214 Galaxy的无线电连续频谱数据来限制暗物质质量
Constraining annihilating dark matter mass by the radio continuum spectral data of NGC4214 galaxy
论文作者
论文摘要
最近的伽马射线和无线电观察结果为消灭暗物质提供了严格的限制。当前的$2σ$深色物质质量下限可将热液体歼灭横截面的$ \ sim 100 $ GEV限制在$ \ sim \ sim。在本文中，我们使用附近Galaxy NGC4214的无线电连续光谱数据，并区分热贡献，暗物质歼灭贡献和宇宙射线贡献。我们可以对暗物质质量和歼灭横截面获得更严格的限制。获得的$5σ$ nihihitating暗物质质量的下限为300 GEV，220 GEV，220 GEV，220 GEV，500 GEV和600 GEV，对于$ e^+E^ - $，$μ^+μ^+μ^ - $，$τ^+τ^+τ^+τ^+w^+w^+w^+w^+w^ - $ and $ b \ bar b \ bar \ bar {b \ bar} $ cansels。这些限制挑战了我们银河系中伽马射线，正电子和反蛋白质过量的暗物质解释。
Recent gamma-ray and radio observations provide stringent constraints for annihilating dark matter. The current $2σ$ lower limits of dark matter mass can be constrained to $\sim 100$ GeV for thermal relic annihilation cross section. In this article, we use the radio continuum spectral data of a nearby galaxy NGC4214 and differentiate the thermal contribution, dark matter annihilation contribution and cosmic-ray contribution. We can get more stringent constraints of dark matter mass and annihilation cross sections. The $5σ$ lower limits of thermal relic annihilating dark matter mass obtained are 300 GeV, 220 GeV, 220 GeV, 500 GeV and 600 GeV for $e^+e^-$, $μ^+μ^-$, $τ^+τ^-$, $W^+W^-$ and $b\bar{b}$ channels respectively. These limits challenge the dark matter interpretation of the gamma-ray, positron and antiproton excess in our Milky Way.
