An Einstein search for X-ray emission from comet Bradfield (1979l)

H. S. Hudson, W. H. Ip, D. A. Mendis

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25 Scopus citations


X-radiation may result from active plasma phenomena in the interactions of comets with the solar wind. We have carried out a limited but sensitive search for soft X-radiation from Comet Bradfield (1979l), on 1980 Feb. 5. No X-radiation was detected at a level (3σ) of 1.7 × 10-13 erg(cm2sec keV)-1 in the 0.2 - 4.0 kev range. This corresponds to a limit on the power dissipated in the comet by non-thermal electrons of approximately 1019 ergs sec-1, averaged over the 2568-sec exposure to the comet. This energy deposition is near the magnitude suggested by simple theoretical ideas, and further searches of appropriate comets both in soft X-radiation and at radio wavelengths seem warranted.

Original languageEnglish
Pages (from-to)1373-1376
Number of pages4
JournalPlanetary and Space Science
Issue number12
StatePublished - Dec 1981


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