Nonlinear Dynamics of Instabilities in Radiatively Driven Stellar Winds

辐射驱动恒星风不稳定性的非线性动力学

• 批准号: 8814580
• 负责人: Stanley Owocki
• 金额: $ 14.38万
• 依托单位: Bartol Research Institute
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-11-01 至 1992-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8814580&HistoricalAwards=false
• 关键词: Nonlinear; Dynamics; Instabilities; Radiatively; Driven

All stars lose mass from their surfaces by what has become known as stellar winds. In the case of cool stars, like the sun, the winds emanate from coronae, the tenuous outermost gaseous layers of those stars; and these winds are ultimately due to energy deposited from lower layers into the coronae. In the case of hot and luminous stars, the winds are driven by photons that are absorbed by gas particles constituting the stars' atmospheres. This absorption of photons can lead to dynamic instabilities and emission of radiation from radio to X-ray frequencies, offering opportunities for indirectly observing the wind generating mechanism. The Principal Investigator proposes to model this mechanism numerically and analytically.

所有的恒星都会从表面损失质量， 恒星风 在冷恒星的情况下，比如太阳， 风来自日冕，即最外层的稀薄气体层 而这些风最终是由于能量 从下层沉积到冠状部。 在热的情况下 和发光的恒星，风是由光子驱动的， 被构成恒星大气层的气体粒子吸收 光子的这种吸收可以导致动态不稳定性， 从无线电到X射线频率的辐射发射， 间接观测风力发电的机会 机制 主要研究者建议对此进行建模 数值和分析的机制。