International Research Fellowship Program: The Breakout of Protostellar Winds from their Natal Cores

威尔金国际研究奖学金计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。该计划的奖项提供了联合研究的机会，并利用国外独特或互补的设施、专业知识和实验条件。该奖项将支持Francis P.Wilkin博士与Susana Lizano博士在墨西哥莫雷利亚的墨西哥国家自治大学合作的为期24个月的研究奖学金。这个项目的共同资金来自数学和物理科学局的多学科活动办公室。这个项目将涉及开发年轻恒星分子外流的动力学和辐射冷却模型。他们将阐明原恒星风加速周围物质的过程。主要的新特征将是1)包括激波风和环境物质之间的切变，2)相互作用的云核心区域的详细流动的计算，特别是风冲击相对于被卷起的环境物质的位置，包括磁场的影响，以及3)预计由ISO、SOFIA和SIRTF观测到的红外发射的详细模型，通过在从动力学模型推导出的激波几何上组装平面激波模型来构建。该模型还将与分子外流的毫米波干涉观测进行比较，在该观测中，我们将预测与数据直接可比的位置-速度图等运动学。得到的结果将是：原恒星风激波的几何形状和位置；阐明切变在分子外流运动学中的作用；被卷起的分子物质的运动学，过去受到混合和/或粘在激波上的非自然假设的限制；分子外流传播到云核之外的初始条件；对磁心原星风x风模型的结果进行了详细的、可测试的预测。除了利扎诺博士之外，莫雷利亚还有一支强大的研究团队，他们正在对年轻恒星的环境进行观测和建模，包括路易斯·罗德里格斯博士、斯坦利·库尔茨博士、艾伦·沃森博士。保拉·达莱西奥、恩里克·巴斯克斯-塞马迪尼博士和哈维尔·巴列斯特罗斯-帕雷德斯博士。

0203178WilkinThe International Research Fellowship Program enables U.S. scientists and engineers to conduct three to twenty-four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad.This award will support a twenty-four month research fellowship by Dr. Francis P. Wilkin to work with Dr. Susana Lizano at the Universidad Nacional Autonoma de Mexico, in Morelia, Mexico. Co-funding for this project comes from the Math and Physical Science Directorate's Office of Multidisciplinary Activities.This project will involve the development of models of both the dynamics and radiative cooling of molecular out-flows from young stars. They will elucidate the process of acceleration of ambient material by protostellar winds. The principal new features will be 1) the inclusion of shear between the shocked wind and ambient matter, 2) the calculation of the detailed flow in the cloud core region of interaction, especially the location of the wind shock relative to the swept-up ambient matter, including the effects of magnetic fields, and 3) a detailed model of the infrared emission expected to be observed by ISO, SOFIA, and SIRTF, constructed by assembling planar shock models over the geometry of the shocks deduced from the dynamical model. The model will also be relevant to comparison with mm-wave interferometric observations of molecular outflows, where we will predict kinematics such as position-velocity diagrams that are directly comparable to the data. The results obtained will be: geometric shape and location of the protostellar wind shock; the elucidation of the role of shear in the kinematics of molecular outflows; the kinematics of swept-up molecular material, which has been limited in the past by unnatural assumptions of mixing and/or sticking to the shock; the initial conditions for molecular outflows propagating beyond the cloud core; detailed, testable predictions of the consequence of the x-wind model of magnetocentrifugal, protostellar winds.Morelia has a strong group of researchers beyond Dr. Lizano, who are working on observations and models of the environments of young stars, including Dr. Luis Rodriguez, Dr. Stanley Kurtz, Dr. Alan Watson, Dra. Paola D'Alessio, Dr. Enrique Vazquez-Semadeni, and Dr. Javier Ballesteros-Paredes.