PROBING FOR EVIDENCE OF PLUMES ON EUROPA WITH HST/STIS
PROBING FOR EVIDENCE OF PLUMES ON EUROPA WITH HST/STIS
复制标题
利用 HST/STIS 探测欧罗巴上的羽流证据
DOI：
10.3847/0004-637x/829/2/121
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
S. Deustua
中科院分区：
文献类型：
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作者：
W. Sparks;K. Hand;M. McGrath;E. Bergeron;M. Cracraft;S. Deustua
罗斯等人。 () 报告了从欧罗巴南部高纬度地区喷出水羽流的证据：对水解离产物的离肢线排放进行光谱检测。在这里，我们展示了哈勃太空望远镜在远紫外线 (FUV) 中直接拍摄的木卫二图像，当时它穿过木星光滑的表面，以测量木卫二边缘以外的气体或气溶胶的吸收情况。在 10 项观测中，我们发现 3 项可能与羽流活动有关。两次观测显示出与 Roth 等人相似的纬度具有统计显着性的特征，第三次观测则位于更赤道的位置。我们考虑了可能影响统计分析并产生伪影的潜在系统效应，并且无法找到任何可以明确解释这些特征的方法，尽管有理由保持谨慎。如果表观吸收特征是真实的，则隐含的排气量与 Roth 等人的相似。特征;然而，明显的活动在我们的数据中出现得更频繁。
Roth et al. () reported evidence for plumes of water venting from a southern high latitude region on Europa: spectroscopic detection of off-limb line emission from the dissociation products of water. Here, we present Hubble Space Telescope direct images of Europa in the far-ultraviolet (FUV) as it transited the smooth face of Jupiter to measure absorption from gas or aerosols beyond the Europa limb. Out of 10 observations, we found 3 in which plume activity could be implicated. Two observations showed statistically significant features at latitudes similar to Roth et al., and the third at a more equatorial location. We consider potential systematic effects that might influence the statistical analysis and create artifacts, and are unable to find any that can definitively explain the features, although there are reasons to be cautious. If the apparent absorption features are real, the magnitude of implied outgassing is similar to that of the Roth et al. feature; however, the apparent activity appears more frequently in our data.