Publication Date:
1995-06-30
Description:
Jupiter's nonthermal microwave emission, as measured by a global network of 11 radio telescopes, increased dramatically during the Shoemaker-Levy 9 impacts. The increase was wavelength-dependent, varying from approximately 10 percent at 70 to 90 centimeters to approximately 45 percent at 6 and 36 centimeters. The radio spectrum hardened (flattened toward shorter wavelengths) considerably during the week of impacts and continued to harden afterward. After the week of cometary impacts, the flux density began to subside at all wavelengths and was still declining 3 months later. Very Large Array and Australia Telescope images of the brightness distribution showed the enhancement to be localized in longitude and concentrated near the magnetic equator. The evidence therefore suggests that the increase in flux density was caused by a change in the resident particle population, for example, through an energization or spatial redistribution of the emitting particles.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉de Pater, I -- Heiles, C -- Wong, M -- Maddalena, R J -- Bird, M K -- Funke, O -- Neidhoefer, J -- Price, R M -- Kesteven, M -- Calabretta, M -- Klein, M J -- Gulkis, S -- Bolton, S J -- Foster, R S -- Sukumar, S -- Strom, R G -- LePoole, R S -- Spoelstra, T -- Robison, M -- Hunstead, R W -- Campbell-Wilson, D -- Ye, T -- Dulk, G -- Leblanc, Y -- Lecacheux, A -- New York, N.Y. -- Science. 1995 Jun 30;268(5219):1879-83.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Astronomy Department, University of California, Berkeley 94720, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11536723" target="_blank"〉PubMed〈/a〉
Keywords:
Astronomical Phenomena
;
Astronomy
;
Cosmic Dust
;
*Electrons
;
Elementary Particle Interactions
;
*Jupiter
;
*Meteoroids
;
*Microwaves
;
Spectrum Analysis
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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