论文标题
超物质矮人星系中的暗物质歼灭的伽马射线和同步辐射
Gamma-ray and Synchrotron Radiation from Dark Matter annihilations in Ultra-faint Dwarf Galaxies
论文作者
论文摘要
非常大的（100-1000）质量比率适用于超品种矮星系（UFDS）意味着高浓度的暗物质，因此使它们成为了间接签名暗物质的理想剧院。在本文中，我们考虑了最近发现的14个UFD，并研究了从伽马射线到无线电频率的广泛范围内从它们发出的电磁辐射。我们分析了GMRT和VLA上的高能伽马射线和无线电通量的费米 - 拉特数据，以在nihihihihihitation Cross $ \langleσv\ rangle $中以独立的方式获得上限。我们进一步讨论了平方公里阵列射电望远镜在探测上述UFD的同步辐射时的灵敏度。我们还研究了所述上限对确定各种天体物理参数的不确定性的依赖性。
The very large (100-1000) mass-to-light ratio applicable to the ultra-faint dwarf galaxies (UFDs) implies a high concentration of dark matter, thus rendering them ideal theatres for indirect signatures of dark matter. In this paper, we consider 14 recently discovered UFDs and study the electromagnetic radiation emanating from them over a wide range, from gamma ray down to radio frequencies. We analyze the Fermi-LAT data on high energy gamma rays and radio fluxes at the GMRT and VLA to obtain upper limits on annihilation cross section $\langleσv\rangle$ in a model independent way. We further discuss the sensitivity of the Square Kilometer Array radio telescope in probing the synchrotron radiation from the aforementioned UFDs. We also investigate the dependences of the said upper limits on the uncertainties in the determination of various astrophysical parameters.
