Publication Date:
1999-01-15
Description:
Well-resolved far-ultraviolet spectroscopic images of O I, S I, and previously undetected H ILyman-alpha emission from Io were obtained with the Hubble space telescope imaging spectrograph (STIS). Detected O I and S I lines (1250 to 1500 angstroms) have bright equatorial spots (up to 2.5 kilorayleighs) that shift position with jovian magnetic field orientation; limb glow that is brighter on the hemisphere facing the jovian magnetic equator; and faint diffuse emission extending to approximately 20 Io radii. All O I and S I features brightened by approximately 50 percent in the last two images, concurrently with a ground-based observation of increased iogenic [O I] 6300-angstrom emission. The H ILyman-alpha emission, consisting of a small, approximately 2-kilorayleigh patch near each pole, has a different morphology and time variation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Roesler, F L -- Moos, H W -- Oliversen, R J -- Woodward, R C Jr -- Retherford, K D -- Scherb, F -- McGrath, M A -- Smyth, W H -- Feldman, P D -- Strobel, D F -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):353-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Physics Department, University of Wisconsin, 1150 University Avenue, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9888844" target="_blank"〉PubMed〈/a〉
Keywords:
Atmosphere
;
*Extraterrestrial Environment
;
*Hydrogen
;
*Jupiter
;
Magnetics
;
*Oxygen
;
Spectrophotometry, Ultraviolet
;
*Sulfur
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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