Astrophysical Studies of Gravitational Lenses, Faint Galaxies, Active Galactic Nuclei, and Pulsars

引力透镜、微弱星系、活动星系核和脉冲星的天体物理学研究

• 批准号: 9529170
• 负责人: Roger Blandford
• 金额: $ 45.59万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-01 至 2000-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9529170&HistoricalAwards=false
• 关键词: Astrophysical; Studies; Gravitational; Lenses; Faint

AST 95-29170 PI: Roger Blandford Astrophysical Studies of Gravitational Lenses, Faint Galaxies, Active Galactic Nuclei, and Pulsars. Four subject areas are included in this proposal. The first is gravitational lenses. A survey for multiply-imaged compact radio sources is hoped to discover some good cases with well-understood optical configurations that can measure the Hubble constant from time delays between variations in the multiple images. It is also proposed to explore the possibility of measuring the masses of distant faint galaxies through detecting their mutual weak distortion and by performing imaging spectroscopy on giant arcs formed by rich clusters. Distant faint galaxies are the subject of the second investigation. New data from the Keck and Palomar telescopes will be obtained and applied to learning the distances and fundamental properties of these galaxies. .....The third area is active galactic nuclei, with studies ranging from the theoretical question of the causal behavior of a black hole magnetosphere to analysis of broad absorption and emission lines in quasars. New computational capabilities allow 3-D magnetohydrodynamic simulations to explore the evolution of magnetic field in a giant radio- emitting lobe. The last investigation will be the physics and observational implications of a model of radio pulsar emission that relies on cyclotron-Cerenkov maser action.

AST 95-29170 PI：Roger Blandford 引力透镜、暗星系、活动星系核和脉冲星的天体物理学研究。 本提案包括四个主题领域。第一个是引力透镜。对多重成像的致密射电源的调查希望发现一些具有良好理解的光学配置的良好情况，这些光学配置可以从多个图像中的变化之间的时间延迟测量哈勃常数。还提议探索通过探测遥远的暗星系之间的相互弱畸变和通过对富星系团形成的巨弧进行成像光谱学来测量它们的质量的可能性。 遥远的暗星系是第二次调查的主题。从凯克和帕洛玛望远镜获得的新数据将用于了解这些星系的距离和基本性质。 .....第三个领域是活动星系核，研究范围从黑洞磁层因果行为的理论问题到类星体中宽吸收和发射线的分析。新的计算能力允许三维磁流体动力学模拟来探索巨大无线电发射波瓣中磁场的演化。 最后的调查将是一个模型的无线电脉冲星发射，依赖于回旋加速器切伦科夫脉泽行动的物理和观测的影响。