Are Optically Thick Winds Regulated by the Distribution Over Line Wavelength Rather Than Line Strength?

Gayley，Kenneth“光学厚风是否由线波长分布而不是线强度调节？AST-0098155最大质量的恒星注定要以超新星爆发结束其活跃的生命。在此之前，这样一颗星星经历了大量的质量损失，通过径向驱动风，比那些与太阳等较小质量的恒星相关的恒星强许多数量级。了解这些风是如何运作的是很重要的，这不仅是因为它们在向星际介质传递物质和能量方面发挥了作用，而且还因为需要确定超新星爆炸的初始参数，而超新星爆炸本身又会用恒星内部深处产生的物质和能量丰富星际介质。在这个奖项的过程中，PI和他的学生。将探讨导致沃尔夫-拉叶星质量损失率极大的因素。该计划的工作是从假设的主要不透明度因素是在膨胀的恒星大气中的吸收线的波长分布。将进行详细的计算，看看这是如何驱动这些恒星的极端质量损失的。

Gayley, Kenneth"Are Optically Thick Winds Regulated by the Distribution Over Line Wavelength Rather Than Line Strength?"AST-0098155The most massive stars are predestined to end their active lives with a supernova outburst. Prior to this terminal event, such a star undergoes substantial mass loss through radially driven winds that are many orders of magnitude stronger than those associated with stars of smaller mass like the Sun. It is important to understand how these winds operate, not only because of their part in transferring matter and energy into the interstellar medium but also because of the need to fix the initial parameters of the supernova explosion which itself in turn will enrich the interstellar medium with matter and with energy generated deep in the stellar interior. During the course of this award, the PI and his student. will explore those factors which lead to the extremely large mass loss rates in Wolf-Rayet stars. The plan is to work from the assumption that the major opacity factor is the wavelength distribution of the absorption lines in the expanding stellar atmosphere. Detailed calculations will be carried out to see how this drives the extreme mass loss from these stars.***