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Science 18 April 1986:
Vol. 232. no. 4748, pp. 382 - 385
DOI: 10.1126/science.232.4748.382
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Articles

International Cometary Explorer Encounter with Giacobini-Zinner: Magnetic Field Observations

EDWARD J. SMITH 1, BRUCE T. TSURUTANI 1, JAMES A. SLVAIN 1, DOUGLAS E. JONES 2, GEORGE L. SISCOE 3, and D. ASOKA MENDIS 4

1 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109.
2 Department of Physics and Astronomy, Brigham Young University, Provo, UT 84601.
3 Department Of Atmospheric Science, University of California, Los Angeles, CA 90024.
4 Department of Electrical Engineering and Computer Science University of California San Diego, La Jolla CA 92093.

The vector helium magnetometer on the International Cometary Explorer observed the magnetic fields induced by the interaction of comet Giacobini-Zinner with the solar wind. A magnetic tail was penetrated sim7800 kilometers downstream from the comet and was found to be 104 kilometers wide. It consisted of two lobes, containing oppositely directed fields with strengths up to 60 nanoteslas, separated by a plasma sheet sim103kilometers thick containing a thin current sheet. The magnetotail was enclosed in an extended ionosheath characterized by intense hydromagnetic turbulene and interplanetary fields draped around the comet. A distant bow wave, which may or may not have been a bow shock, was observed at both edges of the ionosheath. Weak turbulence was observed well upstream of the bow wave.

Submitted on November 20, 1985
Accepted on February 6, 1986


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
The International Cometary Explorer Mission to Comet Giacobini-Zinner.
T. T. VON ROSENVINGE, J. C. BRANDT, and R. W. FARQUHAR (1986)
Science 232, 353-356
   Abstract »    PDF »
Comet Giacobini-Zinner: Plasma Description.
S. J. BAME, R. C. ANDERSON, J. R. ASBRIDGE, D. N. BAKER, W. C. FELDMAN, S. A. FUSELIER, J. T. GOSLING, D. J. MCCOMAS, M. F. THOMSEN, D. T. YOUNG, et al. (1986)
Science 232, 356-361
   Abstract »    PDF »
Observations of Energetic Ions from Comet Giacobini-Zinner.
R. J. HYNDS, S. W. H. COWLEY, T. R. SANDERSON, K.-P. WENZEL, and J. J. VAN ROOIJEN (1986)
Science 232, 361-365
   Abstract »    PDF »
Comet Giacobini-Zinner: In Situ Observations of Energetic Heavy Ions.
F. M. IPAVICH, A. B. GALVIN, G. GLOECKLER, D. HOVESTADT, B. KLECKER, and M. SCHOLER (1986)
Science 232, 366-369
   Abstract »    PDF »
Plasma Wave Observations at Comet Giacobini-Zinner.
F. L. SCARF, F. V. CORONITI, C. F. KENNEL, D. A. GURNETT, W.-H. IP, and E. J. SMITH (1986)
Science 232, 377-381
   Abstract »    PDF »


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