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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03377naa a2200385 4500 | |
| 001 | oai:DiVA.org:kth-231635 | |
| 003 | SwePub | |
| 008 | 180903s2018 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2316352 URI |
| 024 | 7 | a https://doi.org/10.1029/2018JE0055702 DOI |
| 040 | a (SwePub)kth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Becker, T. M.u Southwest Res Inst, San Antonio, TX 78228 USA.4 aut |
| 245 | 1 0 | a The Far-UV Albedo of Europa From HST Observations |
| 264 | 1 | b AMER GEOPHYSICAL UNION,c 2018 |
| 338 | a print2 rdacarrier | |
| 500 | a QC 20180903 | |
| 520 | a 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 similar to 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- (121.6nm), 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 165nm on any hemisphere of Europa, which is intriguing since such an absorption feature has been observed on the icy Saturnian satellites. Plain Language Summary We used observations spanning from 1999 to 2015 obtained by the Space Telescope Imaging Spectrograph on the Hubble Space Telescope to study the surface reflectance of Europa at far-ultraviolet (UV) wavelengths. We find that Europa has a low reflectance in the UV and that there is little variation in the surface brightness at most of the UV wavelengths. When observed at visible wavelengths, one of Europa's hemispheres is brighter than the other, but at the UV wavelength of 121.6nm, the hemisphere brightness is reversed. We also find that Europa looks different from the icy moons of Saturn at far-UV wavelengths. | |
| 650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Geofysik0 (SwePub)105052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Geophysics0 (SwePub)105052 hsv//eng |
| 653 | a Europa | |
| 653 | a UV | |
| 653 | a albedo | |
| 700 | 1 | a Retherford, K. D.u Southwest Res Inst, San Antonio, TX 78228 USA.4 aut |
| 700 | 1 | a Roth, Lorenzu KTH,Rymd- och plasmafysik4 aut0 (Swepub:kth)u1ml3zu9 |
| 700 | 1 | a Hendrix, A. R.u Planetary Sci Inst, Tucson, AZ USA.4 aut |
| 700 | 1 | a McGrath, M. A.u SETI Inst, Mountain View, CA USA.4 aut |
| 700 | 1 | a Saur, J.u Univ Cologne, Inst Geophys & Meteorol, Cologne, Germany.4 aut |
| 710 | 2 | a Southwest Res Inst, San Antonio, TX 78228 USA.b Rymd- och plasmafysik4 org |
| 773 | 0 | t Journal of Geophysical Research - Planetsd : AMER GEOPHYSICAL UNIONg 123:5, s. 1327-1342q 123:5<1327-1342x 2169-9097x 2169-9100 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231635 |
| 856 | 4 8 | u https://doi.org/10.1029/2018JE005570 |
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