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Science 3 January 1997:
Vol. 275. no. 5296, pp. 49 - 51
DOI: 10.1126/science.275.5296.49
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Reports

Generation of X-rays from Comet C/Hyakutake 1996 B2

R. Bingham, J. M. Dawson, V. D. Shapiro, D. A. Mendis, B. J. Kellett

The instability resulting from the relative motion of newly picked-up cometary photoions and the solar wind generates lower hybrid waves that are capable of accelerating electrons to the keV range of energies. These electrons may be responsible for the x-rays from comet C/Hyakutake 1996 B2 seen by the Röntgen X-ray Satellite. The inferred x-ray photon power depends on the electron energy, with keV electrons providing values of photon power two orders of magnitude greater than 100 eV electrons. These observations and in particular, spectral resolution of the x-rays, should provide more insight into the composition of the comet.

R. Bingham, B. J. Kellett, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon, OX11 0QX, UK.
J. M. Dawson, Department of Physics, University of California, Los Angeles, CA 90024, USA.
V. D. Shapiro, Department of Physics, University of California at San Diego, La Jolla, CA 92092, USA.
D. A. Mendis, Department of Electrical and Computing Science, University of California at San Diego, La Jolla, CA 92092, USA.

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