کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8137699 | 1523548 | 2014 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Two new, rare, high-effusion outburst eruptions at Rarog and Heno Paterae on Io
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Observations obtained with the near-infrared camera NIRC2, coupled to the adaptive optics system on the 10-m W.M. Keck II telescope on Mauna Kea, Hawaii, on 15 August 2013 at â¼15:30 UT revealed two large “Outburst”-class volcanic eruptions on Io. Follow-up observations five days later showed that both eruptions had substantially faded. The most energetic eruption was at Rarog Patera, at a location near 305°W, 42°S; a smaller one occurred further south at â¼310°W and â¼57°S, close to Heno Patera. Total radiant fluxes at Rarog Patera on August 15 were of order â¼500 GW/sr/μm at wavelengths between 2 and 4 μm, and close to 250 GW/sr/μm at 1.6 μm, indicative of an effective temperature of â¼1040 K over an area of â¼120 km2, and a total thermal emission of nearly 8 TW. At Heno Patera the 4-μm flux measured â¼250 GW/sr/μm, and â¼90 GW/sr/μm at 2.2 μm, suggestive of an effective temperature of â¼720 K over an area of more than 300 km2, and a total thermal emission of â¼5-6 TW. Fits of the Davies (Davies, A.G. [1996]. Icarus 124(1), 45-61) Io Flow Model indicate that these two eruptions are vigorous and the exposed surfaces are mostly very young, no older than 4-5 min at Rarog Patera and a few hours at Heno Patera. The model fits suggest that in both locations lava fountaining is taking place, a highly-energetic style of volcanism. Using follow-up observations taken between August 20 and September 7 we estimate peak effusion rates between 5 Ã 104 and 105 m3/s.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Icarus - Volume 242, 1 November 2014, Pages 365-378
Journal: Icarus - Volume 242, 1 November 2014, Pages 365-378
نویسندگان
Imke de Pater, Ashley Gerard Davies, Máté Ádámkovics, David R. Ciardi,