Physics of the Hydrogen Geocorona

氢地冕的物理学

• 批准号: 9908775
• 负责人: Fred Roesler
• 金额: $ 24万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-04-01 至 2004-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9908775&HistoricalAwards=false
• 关键词: Physics; Hydrogen; Geocorona

ATM-9908775Roesler, FredThis proposal is for systematic studies of geocoronal Balmer-alpha line profiles to investigate the detailed behavior of cascade and other possible excitation mechanisms in addition to direct Lyman-beta excitation. For the first time coincident observation of geocoronal hydrogen Balmer-alpha and Balmer-beta line profiles will be made using two high resolution Fabry-Perot annular summing spectrometers located at the Pine Bluff Observatory near Madison, WI. The Balmer-alpha and Balmer-beta line profiles are composed of different fine structures, but are affected by the same exospheric kinematics. Comparison of both sets of observations with solar Lyman line radiative transfer modeling will facilitate isolation of signatures in the line profile due to kinematics from those due to cascade or other excitation mechanisms.The potential for future coincident observations with instruments aboard the TIMED satellite could yield a very comprehensive body of consistently calibrated geocoronal Balmer-alpha, Balmer-beta, and Lyman-alpha emission data, along with their solar excitation fluxes, and lead to a new level of understanding of the physics of the hydrogen geocorona.

ATM-9908775 Roesler，FredThis proposal is for systematic studies of geocoronal Balmer-alpha line profiles to investigate the detailed behavior of cascade and other possible excitation mechanisms adding to direct Lyman-beta excitation. 第一次同时观测地冠氢的巴耳末-α和巴耳末-β线配置文件将使用两个高分辨率法布里-珀罗环形求和光谱仪位于海崖天文台附近的麦迪逊，威斯康星州。 Balmer-alpha和Balmer-beta线剖面由不同的精细结构组成，但受相同的外逸层运动学影响。 将这两组观测结果与太阳莱曼线辐射传输模型进行比较，将有助于将运动学引起的线轮廓中的特征与级联或其他激发机制引起的特征隔离开来。未来与TIMED卫星上的仪器进行同步观测的可能性可以产生一个非常全面的一致校准的地冠Balmer-alpha、Balmer-beta和Lyman-alpha发射数据体，沿着它们的太阳激发通量，并导致对氢地日冕物理学的理解达到一个新的水平。