Collaborative Research: Dark Matter in Galaxy Halos

该小组将研究附近星系中神秘的“暗物质”。 暗物质并不辐射，但它的引力牵引着星系中的恒星。 对这种示踪星的观测提供了关于暗物质的线索。 该团队将使用前沿设备来研究光波长的星光。 他们将聚焦于巨大星系的微弱边缘和一些刚刚发现的矮星系。 研究小组将把他们的观测结果与这些不同的（因此具有挑战性的）环境中的暗物质模拟进行比较。 高级小组成员将培训从任职人数不足的群体中征聘的初级成员。 该团队将继续与Science Buddies成功合作，这是一个提高K-12科学素养的在线资源。对于巨大的早期星系，该团队将利用化学动力学来绘制它们的暗物质分布并研究它们的组装历史。 对于矮超扩散星系，研究小组将使用光谱学来研究它们的暗物质分布和星星形成历史。

The team will investigate the enigmatic "dark matter" in nearby galaxies. Dark matter does not radiate but its gravity tugs at the stars in a galaxy. Observations of such tracer stars provide clues about the dark matter. The team will use forefront facilities to study the starlight at optical wavelengths. They will focus on the faint outskirts of giant galaxies and on some just-discovered dwarf galaxies. The team will compare their observations to simulations of the dark matter in these diverse -- thus challenging -- settings. Senior team members will train junior members recruited from underrepresented groups. The team will continue its successful partnership with Science Buddies, an on-line resource for increasing K-12 science literacy.For the giant early-type galaxies, the team will use chemodynamics to map out their dark matter distributions and to study their assembly histories. For the dwarf ultra-diffuse galaxies, the team will use spectroscopy to study their dark matter distributions and their star formation histories.