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

Gayley, Kenneth，《光学厚风是由线波长分布而不是线强度调节的吗？》质量最大的恒星注定要以超新星爆发来结束它们的活跃生命。在这最后的事件发生之前，这样的恒星经历了大量的质量损失，这是由径向驱动的风造成的，这种风比像太阳这样质量较小的恒星强很多个数量级。了解这些风是如何运作的是很重要的，不仅因为它们在将物质和能量转移到星际介质中所起的作用，而且还因为需要确定超新星爆炸的初始参数，而超新星爆炸本身反过来又会使星际介质丰富起来，使恒星内部深处产生的物质和能量丰富起来。在这个奖项的过程中，PI和他的学生。将探索导致沃尔夫-拉叶星质量损失率极高的因素。该计划是基于一个假设，即主要的不透明因素是在膨胀的恒星大气中吸收线的波长分布。将进行详细的计算，以了解这是如何导致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.***