Collaborative Research: Arecibo Radar Studies of Zodiacal and Interstellar Dust in the Solar System.

合作研究：阿雷西博雷达对太阳系黄道带和星际尘埃的研究。

• 批准号: 0205848
• 负责人: John Mathews
• 金额: $ 20.6万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-01 至 2006-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0205848&HistoricalAwards=false
• 关键词: Collaborative; Research; Arecibo; Radar; Studies

AST 0205848MathewsDr. John Mathews, at Penn State University, in collaboration with Dr. David Meisel, at State University of New York at Geneseo, will conduct a 3-year observational and analysis/modeling study of small particles in the Solar System based on radar micrometeor observations performed at the Arecibo Observatory. Knowledge of the distribution, sources, and gravitational, electrodynamical evolution of interplanetary dust particles (IDPs) in the ~0.2-100 micron size range is critical to the planetary sciences and-as extrasolar and interstellar particles are also present-to local galactic science. The Arecibo Observatory (AO) UHF radar has proven to be uniquely suited for ground-based micrometeor observations that yield velocity, deceleration, and radiant information-and thus orbits-of large numbers of interplanetary and hyperbolic dust particles. Observational results now extend from 1997 through the present with a steadily evolving technique that now yields meteoroid Doppler speeds with instantaneous accuracies of as small as 10 m/sec (with meteoroid speeds ranging over 10-90 km/sec thus far). This combined with a sorting mechanism based on classical, in-atmosphere meteoroid dynamics, clearly distinguishes down-the-beam particles from those meteoroids with a significant across-the-beam velocity component. The new effort extends these studies to details of IDP distribution/evolution in the solar system and considers the role of the interstellar particle flux to the solar system as well as local galactic processes/features illuminated by this flux.The new observational/analysis/modeling study funded with this award will continue providing routine sampling of IDPs including the expected earth-crossing asteroidal-orbit particles, interstellar particles (ISPs), Jovian perturbed and/or derived particles, and low-mass b particles ejected by radiation pressure from the inner solar system. As the database of ISPs grows, these researchers will continue theoretical/modeling studies of the flux and origins of the largest of the interstellar particles. Thus far they can account for all AO ISPs as being products of the same supernova thatproduced the Geminga pulsar. This effort has involved and will continue to involve undergraduates from SUNY-Geneseo, Penn State, and other institutions and graduate students from Penn State as well as the staff of Arecibo Observatory and other organizations. Results from these efforts appear in several courses including electromagnetics, astrophysics, and plasmas at both Geneseo and Penn State.***

AST 0205848MATHEWSDR。宾夕法尼亚州立大学的约翰·马修斯（John Mathews）与纽约州立大学Geneseo大学的戴维·迈塞尔（David Meisel）博士合作，将根据在Arecibo Persvatory进行的雷达微观晶体观察结果对太阳系中的小颗粒进行了为期3年的观察和分析/建模研究。了解〜0.2-100微米大小范围内的分布，来源和引力，电动力学演化对行星科学至关重要，并且是当地的银河系科学，以及 - AS AS AS AS AS极性和星际颗粒。事实证明，Arecibo天文台（AO）UHF雷达非常适合地面的微量流星观测值，这些观测值产生速度，减速和辐射信息，并因此是大量的跨月球际和双曲线粉尘颗粒。现在，观察结果从1997年延伸到目前，采用稳定发展的技术，该技术现在以瞬时准确的速度产生了恒定的多普勒速度，其瞬时精度为10 m/sec（到目前为止，远高于10-90 km/sec的气象体速度）。这与基于经典的大气中流星动力学的分类机制相结合，清楚地将底部颗粒与具有显着跨境速度成分的陨石体区分开。 新的努力将这些研究扩展到太阳系中IDP分布/进化的细节，并考虑了该磁通量的新观察/分析/建模研究，该奖项将继续提供包括预期的iSPRETS ARTERLELS ISSTRALT-CRASS-CROSSISER-CRASSISER-CRASSIDAR-CRASSERISAR-CRASSISAR-CRASSIDARSISARISORIDAR （少），并考虑了该通量的新观察/分析/建模研究，以实现该磁通状态，考虑到太阳系中的星际粒子通量以及当地的银河系过程/特征。 Jovian扰动和/或衍生的颗粒，以及从内部太阳系辐射压力弹出的低质量B颗粒。随着ISP的数据库的增长，这些研究人员将继续对最大星际颗粒的通量和起源进行理论/建模研究。到目前为止，他们可以将所有AO ISP解释为同一超新星的产物，从而产生了Geminga Pulsar。 这项工作涉及并将继续涉及来自纽约州立大学，宾夕法尼亚州立大学以及宾夕法尼亚州立大学以及Arecibo天文台和其他组织的其他机构的本科生和研究生。这些努力的结果出现在Geneseo和Penn State的多个课程中。***