Io Volcanism Seen by New Horizons: A Major Eruption of the Tvashtar Volcano-Reference-Cited by-同舟云学术

Io Volcanism Seen by New Horizons: A Major Eruption of the Tvashtar Volcano

Published:2007-10-12 Issue:5848 Volume:318 Page:240-243
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Spencer J. R.¹²³⁴⁵,Stern S. A.¹²³⁴⁵,Cheng A. F.¹²³⁴⁵,Weaver H. A.¹²³⁴⁵,Reuter D. C.¹²³⁴⁵,Retherford K.¹²³⁴⁵,Lunsford A.¹²³⁴⁵,Moore J. M.¹²³⁴⁵,Abramov O.¹²³⁴⁵,Lopes R. M. C.¹²³⁴⁵,Perry J. E.¹²³⁴⁵,Kamp L.¹²³⁴⁵,Showalter M.¹²³⁴⁵,Jessup K. L.¹²³⁴⁵,Marchis F.¹²³⁴⁵,Schenk P. M.¹²³⁴⁵,Dumas C.¹²³⁴⁵

Affiliation:

1. Southwest Research Institute, 1050 Walnut Street, Suite 300, Boulder, CO 80302, USA.

2. NASA Headquarters, Washington, DC 20546, USA.

3. Applied Physics Laboratory, Johns Hopkins University, 11100 Johns Hopkins Road, Laurel, MD 20723, USA.

4. NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.

5. Southwest Research Institute, Post Office Drawer 28510, San Antonio, TX 78228, USA.

Abstract

Jupiter's moon Io is known to host active volcanoes. In February and March 2007, the New Horizons spacecraft obtained a global snapshot of Io's volcanism. A 350-kilometer-high volcanic plume was seen to emanate from the Tvashtar volcano (62Â°N, 122Â°W), and its motion was observed. The plume's morphology and dynamics support nonballistic models of large Io plumes and also suggest that most visible plume particles condensed within the plume rather than being ejected from the source. In images taken in Jupiter eclipse, nonthermal visible-wavelength emission was seen from individual volcanoes near Io's sub-Jupiter and anti-Jupiter points. Near-infrared emission from the brightest volcanoes indicates minimum magma temperatures in the 1150- to 1335-kelvin range, consistent with basaltic composition.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference23 articles.

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2. Io's Atmospheric Response to Eclipse: UV Aurorae Observations

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5. âPele-typeâ plumes are thought to result from direct ejection of gas from a volcanic vent whereas the smaller âPrometheus-typeâ plumes may result from remobilization of surface volatiles by lava flows.

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