US-France Cooperative Research: The Environment of T Tauri Stars: Protoplanetary Disks and Collimated Winds

该奖项将支持天文学的合作研究， 加州大学伯克利分校的GiborBasri博士和 Claude Bertout，Institut d'Astrophysique de巴黎，法国. 的 该项目的目标是调查的物理 金牛座T盘和风的性质。 金牛座T的进化 阶段代表着年轻星星演化的第一次 它的表面可以直接观察到。 此时的 观察到的光谱有些异常，显示出一些和 各种各样的发射线，和连续过剩的红外和 紫外线 这些光谱特性使我们无法 虽然有很多理论被提出。 当前工作 研究人员的研究表明，这些异常现象的起源 如果这些年轻的恒星仍然被扁平的 由气体和尘埃组成的赤道盘（行星可以从这些盘中 形式）。 有证据表明，材料仍在继续流动， 穿过这些圆盘到达恒星。 该系统还 在双极流中喷射出相当大量的材料。 在这个联合项目中，研究人员建议开发和 通过合作扩大对新星的了解 包括协调观测和理论 发展 他们将同时研究来自 年轻的类太阳恒星，这应该有助于了解 我们早期的太阳系， 银河系中的行星系统 该项目将受益于 大量的高色散阶梯光栅光谱的收集博士。 巴斯里，以及伯图博士的理论专长。

This award will support collaborative research in astronomy between Dr. Gibor Basri, University of California at Berkeley, and Dr. Claude Bertout, Institut d'Astrophysique de Paris, France. The objective of the project is the investigation of the physical properties of T Tauri disks and winds. The T Tauri evolutionary stage represents the first time during a young star's evolution that its surface can be directly observed. At this time the observed spectrum is somewhat abnormal, showing a number and variety of emission lines, and continuum excess in the infrared and ultraviolet. These spectral peculiarities have eluded a unified explanation, though many theories have been proposed. Current work by the investigators has shown that the origin of these anomalies can be understood if these young stars are still surrounded by flat equatorial disks of gas and dust (out of which planets could form). There is evidence that material is continuing to flow through these disks and onto the stars. The systems are also ejecting a considerable amount of material in bipolar flows. In this joint project, the investigators propose to develop and expand this understanding of new stars through a collaboration involving both coordinated observations and theoretical development. They will study both the disks and the winds from young solar-like stars, which should shed light on conditions in our own early solar system and eventually on the prevalence of planetary systems in the galaxy. This project will benefit from the large set of high dispersion echelle spectra collected by Dr. Basri, as well the theoretical expertise of Dr. Bertout.