Using Lyman-Alpha Absorbers as Probes of Galaxy Halos

AST-0302049罗森伯格，杰西卡博士。罗森博格被授予美国国家科学基金会天文学和天体物理学博士后奖学金，在科罗拉多大学开展一项研究和教育计划。她的研究将探索遥远的类恒星物体(QSO)和我们之间的干涉吸收的本质。中性氢原子对紫外线莱曼-阿尔法辐射的吸收完全可以看到红移，并可以用来绘制出中间物质的图谱。罗森博格博士将把地面光学和射电观测与空间紫外光谱学相结合，以研究这些吸收体的局部性质，即低红移。她将使用深星系探测来寻找低红移吸收体和星系之间的关联。紫外线空间观测还将使她能够使用这些吸收体作为具有统计意义的星系晕样本的探测器。使用这两种技术，她将研究星系晕的大小和结构，以及由于反馈过程重元素通过这些晕的扩散。除了她的研究，罗森博格博士还将在K-12和本科生的教学和推广方面进行双管齐下的努力。她将与科罗拉多大学的科学探索者项目合作，该项目通过与教师和他们的五名学生举行为期一天的活动研讨会，为K-12教师提供专业发展。罗森博格博士将致力于天文学课程的开发，并协助一些研讨会。在与这个项目合作一年后，她将与天文学教授合作，使用创新的方法为大型本科生天文学调查课程开发材料。***

AST-0302049 Rosenberg, JessicaDr. Rosenberg is awarded an NSF Astronomy and Astrophysics Postdoctoral Fellowship to carry out a program of research and education at the University of Colorado. Her research will explore the nature of intervening absorption between distant Quasi-Stellar Objects (QSO's) and ourselves. This absorption of ultraviolet Lyman-alpha radiation by neutral hydrogen atoms is seen at all redshifts, and can be used to map out the intervening material. Dr. Rosenberg will combine ground-based optical and radio observations with space-based ultraviolet spectroscopy to study the nature of these absorbers locally, i.e. at low redshifts. She will use deep galaxy surveys to look for correlations between low redshift absorbers and galaxies. Ultraviolet space-based observations will also allow her to use these absorbers as probes of a statistically significant sample of galaxy halos. Using these two techniques she will study the sizes and structure of the galaxy halos, as well as the spread of heavy elements through those halos due to feedback processes. In addition to her research, Dr. Rosenberg will conduct a two-pronged effort in teaching and outreach at the K-12 and undergraduate levels. She will work with the Science Explorers program at the University of Colorado, a program that provides professional development for K-12 teachers through day-long, activity-based workshops with the teachers and five of their students. Dr. Rosenberg will work on curriculum development in astronomy and also assist with some of the workshops. After a year of working with this program, she will work with astronomy professors in developing material using innovative methods for the large undergraduate survey course in astronomy. ***