论文标题
在Ursa Major中发现30度长紫外线
Discovery of a Thirty-Degree Long Ultraviolet Arc in Ursa Major
论文作者
论文摘要
我们对银河系中星际媒介的看法以及远处的宇宙受到太阳能社区当地环境的结构的影响。在这里，我们介绍了仅厚度仅几个弧形的紫外发射的30度长弧：Ursa主要弧。它由在巨人卫星的近距离和遥远的脉冲带中看到的几个街道组成。 1997年，在Hα光谱线中首先在Hα光谱线中检测到弧的两级截面。这项工作中包括的业余天文学家团队在光学中看到了其他部分。天空的这个方向以非常低的氢柱密度和尘埃灭绝而闻名。许多深层进行半乳酸和宇宙学研究的领域都朝这个方向发展。弥漫性紫外线和光学星星发射通常归因于星际灰尘散射光。但是，与普朗克卫星观察到的URSA主要弧与热粉尘发射之间缺乏相关性，这表明必须发挥其他发射机制。我们讨论了由于太阳能社区发生星际冲击的结果，Ursa主要弧的起源。
Our view of the interstellar medium of the Milky Way and the universe beyond is affected by the structure of the local environment in the Solar neighborhood. Here, we present the discovery of a thirty-degree long arc of ultraviolet emission with a thickness of only a few arcminutes: the Ursa Major Arc. It consists of several arclets seen in the near- and far-ultraviolet bands of the GALEX satellite. A two-degree section of the arc was first detected in the Hα optical spectral line in 1997; additional sections were seen in the optical by the team of amateur astronomers included in this work. This direction of the sky is known for very low hydrogen column density and dust extinction; many deep fields for extra-galactic and cosmological investigations lie in this direction. Diffuse ultraviolet and optical interstellar emission are often attributed to scattering of light by interstellar dust. The lack of correlation between the Ursa Major Arc and thermal dust emission observed with the Planck satellite, however, suggests that other emission mechanisms must be at play. We discuss the origin of the Ursa Major Arc as the result of an interstellar shock in the Solar neighborhood.
