DOI: 10.1029/2018JE005570
Scopus记录号: 2-s2.0-85047787818
论文题名: The Far-UV Albedo of Europa From HST Observations
作者: Becker T.M. ; Retherford K.D. ; Roth L. ; Hendrix A.R. ; McGrath M.A. ; Saur J.
刊名: Journal of Geophysical Research: Planets
ISSN: 21699097
出版年: 2018
卷: 123, 期: 5 起始页码: 1327
结束页码: 1342
语种: 英语
英文关键词: albedo
; Europa
; UV
Scopus关键词: absorption
; albedo
; Europa
; observational method
; ultraviolet radiation
英文摘要: We present an analysis of Europa's far-UV spectral albedo using observations during the 1999–2015 time period made by the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. Disk-integrated observations show that the far-UV spectrum in the ~130 to 170-nm range is relatively flat or slightly blue (increasing albedo with decreasing wavelength) for the studied hemispheres: the leading, trailing, and anti-Jovian hemispheres. At Lyman-α (121.6 nm), the albedo of the trailing hemisphere continues the blue trend, but it reddens for the leading hemisphere. Also at this wavelength, the albedo of the leading hemisphere, which is higher than the trailing hemisphere at near-UV and visible wavelengths, is lower than the trailing hemisphere, exhibiting spectral inversion. We find no evidence of a sharp water-ice absorption edge at 165 nm on any hemisphere of Europa, which is intriguing since such an absorption feature has been observed on the icy Saturnian satellites. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113980
Appears in Collections: 气候减缓与适应
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作者单位: Southwest Research Institute, San Antonio, TX, United States; Royal Institute of Technology (KTH), Stockholm, Sweden; Planetary Science Institute, Tucson, AZ, United States; SETI Institute, Mountain View, CA, United States; Institute of Geophysics and Meteorology, University of Cologne, Köln, Germany
Recommended Citation:
Becker T.M.,Retherford K.D.,Roth L.,et al. The Far-UV Albedo of Europa From HST Observations[J]. Journal of Geophysical Research: Planets,2018-01-01,123(5)