标题： 表征系外行星直接成像目标附近的银河系和河外背景 显示英文标题

标题： Characterizing the Galactic and Extragalactic Background Near Exoplanet Direct Imaging Targets

摘要： 随着越来越多的任务尝试直接成像和表征围绕附近类太阳恒星运行的系外行星，对可能的污染背景源的高级表征变得越来越重要，并可能影响目标选择。 本文描述了对哈勃源目录、盖亚目录和贝桑松星系模拟的探索，以确定在预期观测时间范围内，一组高自行恒星背景中存在污染源的可能性。 分析表明，对于大多数目标来说，在CGI视场内有一颗恒星的可能性非常低，但在银河纬度较低、源密度较高的区域，微弱的恒星背景源可能是一个问题。 显示英文摘要

摘要： As more missions attempt to directly image and characterize exoplanets orbiting nearby sun-like stars, advance characterization of possible contaminating background sources becomes more important and can impact target selection. This paper describes an exploration of the Hubble Source catalog, Gaia catalog and Besancon galaxy simulations in order to determine the likelihood of having a contaminating source in the background of a set of high proper motion stars in the expected timeframe of observations for the Nancy Grace Roman Space Telescope Coronagraphic Instrument. The analysis shows that for most of the targets, there is a very low possibility of a star falling within the CGI field of view, but that at low galactic latitudes where there is a greater density of sources, faint stellar background sources could be a concern.