Generation of x-rays from comet C/Hyakutake 1996 B2

Science

Volumn 275, Issue 5296, 1997, Pages 49-50

  Bingham, R ^a   Dawson, J M ^b   Shapiro, V D ^c   Mendis, D A ^c   Kellett, B J ^a  

^a RUTHERFORD APPLETON LABORATORY   (United Kingdom)

^b UNIVERSITY OF CALIFORNIA   (United States)

^c UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE; ASTRONOMY; ELECTRON; ENERGY; PHOTON; PRIORITY JOURNAL; X RAY;

EID: 0031024603     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.275.5296.49     Document Type: Article

References (17)

1. C. M. Lisse et al., Science 274, 205 (1996).
2. S. Klimov et al., Nature 321, 292 (1986).
3. K. I. Gringauz et al., Nature 321, 282 (1986).
4. ci) which means that these waves can be in simultaneous Cherenkov resonance with the relatively slow but unmagnetized ions perpendicular to the magnetic field and fast magnetized (hence magnetic field aligned) electrons. Cherenkov resonance occurs when the phase velocity of the wave and the particle velocity are equal; under these conditions strong interaction between the waves and particles is possible and results in energy transfer from the wave to the particle or vice versa. The lower hybrid waves provide the intermediary step in transferring energy between the ions and electrons.
5. M. J. Mumma et al., Science 272, 1310 (1996).
6. D. Krankowsky et al., Nature 321, 326 (1986).
7. H. S. Hudson, W.-H. Ip, D. A. Mendis, Planet. Space Sci. 29, 1373 (1981).
8. J. B. McBride, E. Ott, P. B. Jay, J. H. Orens, Phys. Fluids 157, 2367 (1972). A two stream instability results when two charged particle populations traveling in opposite directions interact.
9. M. K. Wallis and R. S. B. Ong, Planet. Space Sci. 23, 713 (1975). A more accurate calculation based on the analysis of the solar wind dynamics, massloaded by the picked-up cometary ions lead to the same formula for the ion density.
10. D. A. Mendis, H. L. F. Houpis, M. L. Marconi, Physics of Comets Fundamentals of Cosmic Physics (1985), vol. 10.
11. L. D. Landau, J. Phys. USSR 10, 25 (1946); F. F. Chen, Introduction to Plasma Physics and Controlled Fusion (Plenum, New York, 1984), vol. 1, p. 240.
12. L. D. Landau, J. Phys. USSR 10, 25 (1946); F. F. Chen, Introduction to Plasma Physics and Controlled Fusion (Plenum, New York, 1984), vol. 1, p. 240.
13. V. D. Shapiro and V. I. Shevchenko, Sov. Sci. Rev. E, Astrophys. Space Phys. 6, 425 (1988).
14. D. F. Post, R. V. Jensen, C. B. Tarter, W. H. Grasberger, W. A. Lokke, Princeton Plasma Physics Laboratory Report PPPL-1352 (1977).
15. J. M. Dawson, in Fusion, E. Teller, Ed. (Academic Press, New York, 1981), p. 465.
16. J. W. Chamberlain, Physics of the Aurora and Airglow (Academic Press, New York, 1961).
17. This work was supported in part by NSF grant PH-9319198;003 and NASA NAGWA1502.