Dynamics of stellar atmospheres

恒星大气动力学

• 批准号: 3937-2010
• 负责人: Gray, David
• 金额: $ 1.67万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=473769
• 关键词: Dynamics; stellar; atmospheres

The detailed features in starlight are analyzed to determine the kinds of motions found in the atmospheres of stars, how rapidly stars spin, what sort of magnetic fields are generated, and how fast the stars are moving in space. From these measurements, we learn about the physics of convection and pulsation in stars, how rotation combines with convection to make magnetic fields, and how those magnetic fields cause dark spots on the surfaces of stars. We can also observe the longer term variations in the magnetic fields, similar to the 11-year magnetic cycle seen for the sun. This stellar information may help us understand how much the variation in the power from the sun contributes to global warming.

对星光的详细特征进行分析，以确定在恒星大气层中发现的运动类型，恒星旋转的速度，产生的磁场类型以及恒星在太空中的运动速度。从这些测量中，我们了解了恒星中对流和脉动的物理学，旋转如何与对流结合形成磁场，以及这些磁场如何在恒星表面造成黑斑。我们还可以观察到磁场的长期变化，类似于太阳的11年磁周期。这些恒星信息可以帮助我们了解太阳能量的变化对全球变暖的影响程度。