U.S.-Australia Cooperative Research: Monitoring the Radio Outburst of Eta Carinae

9513340白色 该奖项为期三年，将支持马里兰州大学天文学系的Stephen白色博士与澳大利亚望远镜国家设施（AT）的Robert邓肯博士进行合作研究。 这项研究的重点是研究南半球星星船底座η星的无线电发射。 白色博士目前正在进行研究，通过美国国家科学基金会奖的无线电连续观测活动的恒星。 这笔赠款将为他目前的研究增加一个国际层面。 船底座伊塔星被认为是银河系中已知质量最大的恒星之一，它的射电图像只能通过位于Mpora的25米AT盘获得。 对这颗星星的观测揭示了其非凡的无线电发射，使其成为天空中最明亮的无线电星之一。 无线电通量继续上升，因为星星周围的气体显然是被从星星向外传播的扰动电离的。 调查的目的是跟踪爆发的演变并确定其性质，研究电离气体以确定从星星喷出的气体的运动学和流出物中所见的不同不对称性的原因，并通过观察新电离气体的重新组合来确定流出物的物理条件。

9513340 White This award, covering a period of three years, will support the travel of Dr. Stephen White, Department of Astronomy at the University of Maryland, to conduct collaborative research with Dr. Robert Duncan of the Australian Telescope National Facility (AT). The research will focus on a study of the radio emission from the Southern Hemisphere star Eta Carinae. Dr. White is currently conducting research through an NSF award on radio continuum observations of active stars. This grant will add an international dimension to his current research. Radio images of Eta Carinae, thought to be among the most massive known stars in our Galaxy, can only be obtained through the 25m AT dish located at Mpora. Observations of this star have revealed extraordinary radio emissions which have made it one of the brightest radio stars in the sky. The radio flux continues to rise as gas surrounding the star apparently is being ionized by a disturbance propagating outward from the star. The goal of the investigation is to follow the evolution of the outburst and determine its nature, to study the ionized gas in order to determine the kinematics of gas ejected from the star and the cause of the different asymmetries seen in the outflow, and to determine the physical conditions in the outflow by observing the newly-ionized gas recombining.