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

[203178]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。该计划的奖励为联合研究提供了机会，并利用独特或互补的设施、专业知识和国外的实验条件。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立自治大学开展为期24个月的研究。该项目的共同资助来自数学和物理科学理事会的多学科活动办公室。这个项目将涉及发展年轻恒星分子流出的动力学和辐射冷却的模型。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)包含了激波风和环境物质之间的切变；2)计算了相互作用的云核区域的详细流动，特别是风激波相对于被扫过的环境物质的位置，包括磁场的影响；3)ISO、SOFIA和SIRTF预计观测到的红外发射的详细模型。通过将平面激波模型组装在从动力学模型推导出的几何激波上构建而成。该模型还将与分子流出的毫米波干涉观测相比较，在那里我们将预测运动学，如位置-速度图，直接与数据相比较。得到的结果将是：原恒星风激波的几何形状和位置；分子外流运动学中剪切作用的解释被扫过的分子材料的运动学，过去由于混合和/或粘在激波上的非自然假设而受到限制；分子外流在云核外传播的初始条件；详细的，可测试的预测结果的x风模型的磁离心，原恒星风。除了利扎诺博士，莫雷利亚还有一个强大的研究团队，他们正在研究年轻恒星环境的观察和模型，其中包括路易斯·罗德里格斯博士、斯坦利·库尔茨博士、艾伦·沃森博士、德拉。保拉·达莱西奥，恩里克·巴斯克斯·塞马德尼博士，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.