Imaging the Southern Sky in [SII]

想象[SII]中的南方天空

• 批准号: 0205872
• 负责人: John Gaustad
• 金额: $ 5.76万
• 依托单位: Swarthmore College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-07-15 至 2006-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0205872&HistoricalAwards=false
• 关键词: Imaging; Southern; Sky; SII

AST 0205872GaustadDr. John Gaustad, at Swarthmore College, recently completed a Southern H-Alpha Sky Survey Atlas (SHASSA). The images in this atlas have a resolution of 0.8 arcminutes and sensitivity of 2 rayleighs per pixel. Dr. Gaustad will now use the same robotic camera system to obtain comparable images of the brighter H-alpha regions in an emission line of ionized sulfur (SII). The SII/H-alpha ratio is a useful discriminator between regions that are heated by the ultraviolet light of embedded stars and regions that are heated by supersonic shock waves produced by supernova remnants and stellar winds. These measurements will contribute to understanding the astrophysical nature of ionized regions in the interstellar medium of the Galaxy. ***

AST 0205872 gaustaddr。斯沃斯莫尔学院的John Gaustad最近完成了南方H-Alpha巡天图集（SHASSA）。该图集中的图像分辨率为0.8角分，灵敏度为每像素2瑞利。Gaustad博士现在将使用相同的机器人相机系统来获得电离硫（SII）发射线中较亮的h - α区域的可比图像。SII/H-alpha比值是一个有用的鉴别器，可以区分被嵌入恒星的紫外光加热的区域和被超新星残骸和恒星风产生的超音速激波加热的区域。这些测量将有助于理解银河系星际介质中电离区域的天体物理性质。＊＊＊