DOI: 10.1002/2016GL068854
论文题名: Measurements of the ionization coefficient of simulated iron micrometeoroids
作者: Thomas E. ; Horányi M. ; Janches D. ; Munsat T. ; Simolka J. ; Sternovsky Z.
刊名: Geophysical Research Letters
ISSN: 0094-9110
EISSN: 1944-8841
出版年: 2016
卷: 43, 期: 8 起始页码: 3645
结束页码: 3652
语种: 英语
英文关键词: ablation
; interplanetary dust
; ionization coefficient
; meteoroids
Scopus关键词: Ablation
; Carbon dioxide
; Ionization
; Radar
; Interplanetary dust
; Ionization coefficient
; Iron Particles
; Laboratory conditions
; Laboratory datum
; Measurements of
; meteoroids
; Potential problems
; Ionization of gases
; ablation
; carbon dioxide
; data set
; helium
; interplanetary dust
; ionization
; micrometeorite
; nitrogen
; radar interferometry
; wind velocity
英文摘要: The interpretation of meteor radar observations has remained an open problem for decades. One of the most critical parameters to establish the size of an incoming meteoroid from radar echoes is the ionization coefficient, β, which still remains poorly known. Here we report on new experiments to simulate micrometeoroid ablation in laboratory conditions to measure β for iron particles impacting N2, air, CO2, and He gases. This new data set is compared to previous laboratory data where we find agreement except for He and air impacts > 30 km/s. We calibrate the Jones model of β(v) and provide fit parameters to these gases and find agreement with all gases except CO2 and high-speed air impacts where we observe βair > 1 for velocities > 70 km/s. These data therefore demonstrate potential problems with using the Jones model for CO2 atmospheres as well as for high-speed meteors on Earth. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84968861370&doi=10.1002%2f2016GL068854&partnerID=40&md5=8791cffeba450868b2863e6b8a28fdbf
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10073
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Physics Department, University of Colorado Boulder, Boulder, CO, United States
Recommended Citation:
Thomas E.,Horányi M.,Janches D.,et al. Measurements of the ionization coefficient of simulated iron micrometeoroids[J]. Geophysical Research Letters,2016-01-01,43(8).