标题： 紫外消光巡天任务（UVESS）：探测银河系和本星系群星系星际介质的任务概念 显示英文标题

标题： Ultraviolet Extinction Sky Survey (UVESS): A mission concept for probing the interstellar medium in the Milky Way and Local Group galaxies

摘要： 2175 {\AA } 拱背在其强度、宽度和中心波长上表现出相当大的变化，当从银河系和其他星系的不同视线观测时尤其如此。 这些变化为我们提供了宝贵的信息，使我们能够了解不同视线上的星际尘埃颗粒的组成、尺寸分布及其处理过程。 本文介绍了一项名为 UVESS（紫外消光全天巡天）的任务概念，旨在通过绘制大范围天空中的紫外消光曲线斜率和 2175 {\AA } 特征的变化，来研究银河系以及附近的本星系群星系中的星际介质（ISM）的组成。 紫外仪器和技术的最新进展为开发紧凑型高通量仪器铺平了道路。 在本文中，我们概述了针对专门用于研究紫外消光的小卫星平台的科学目标和仪器概念。 显示英文摘要

摘要： The 2175 {\AA} bump shows considerable variations in its strength, width, and central wavelength when observed along different sightlines in the Milky Way and other galaxies. These variations offer valuable insights into the composition, size distribution, and processing of interstellar dust grains along different sightlines. This paper introduces a mission concept called UVESS (Ultraviolet Extinction Sky Survey) aimed at exploring the composition of the interstellar medium (ISM) within both the Milky Way and nearby Local Group Galaxies by mapping the variation of UV extinction curve slopes and the 2175 {\AA} feature across a majority of the sky to gain insights into the makeup of the ISM. Recent advancements in UV instrumentation and technologies pave the way for the development of high-throughput instruments in compact form factors. In this paper, we outline mission science goals and instrument concept tailored for a small satellite-based platform dedicated to the study of UV extinction.