Production of X-rays by comet Hyakutake

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

An explanation of recent observations of a strong X-ray emission from comet Hyakutake (Science , 194, 1996) is proposed. It is based on an idea that the interaction of the solar wind and photoionized cometary plasma produces strong plasma turbulence in the lower hybrid frequency range which is responsible for the acceleration of suprathermal electrons with energies in the range 100eV up to several keV. A nonlinear theory of the instability responsible for the generation of lower-hybrid electric field, typical energies and flux of suprathermal electrons are obtained. Two possible mechanisms of X-ray production by non-thermal energetic keV electrons are analyized; bremsstrahlung and cometary gas (mostly oxygen) K-shell line radiation. It is shown that for conditions under investigation line radiation is dominant resulting in total X-ray luminosity of 2.5 × 1015erg/sec in excellent agreement with ROSAT observed emission of 3.0 × 1015erg/sec.
LanguageEnglish
Pages1043-1047
Number of pages5
JournalAdvances in Space Research
Volume22
Issue number7
DOIs
Publication statusPublished - 1998

Fingerprint

comets
comet
X rays
electron
Electrons
Plasma turbulence
X ray production
Radiation
plasma
plasma turbulence
Solar wind
electrons
x rays
Beam plasma interactions
radiation
bremsstrahlung
solar wind
energy
electric field
Luminance

Keywords

  • acceleration
  • electron
  • electrons
  • emission
  • field
  • fluxes
  • gas
  • generation
  • Halley
  • Hyakutake
  • instability
  • ions
  • line
  • luminosity
  • plasma
  • rosat
  • shell
  • solar
  • solar wind
  • turbulence
  • wind
  • x ray emission
  • x rays
  • X ray
  • comet
  • radiation

Cite this

Bingham, R., Dawson, J. M., Shapiro, V. D., Mendis, D. A., & Kellett, B. J. (1998). Production of X-rays by comet Hyakutake. Advances in Space Research, 22(7), 1043-1047. https://doi.org/10.1016/S0273-1177(98)00146-X
Bingham, R. ; Dawson, J.M. ; Shapiro, V.D. ; Mendis, D.A. ; Kellett, B.J. / Production of X-rays by comet Hyakutake. In: Advances in Space Research. 1998 ; Vol. 22, No. 7. pp. 1043-1047.
@article{30153940119740e79e2f519883ca86db,
title = "Production of X-rays by comet Hyakutake",
abstract = "An explanation of recent observations of a strong X-ray emission from comet Hyakutake (Science , 194, 1996) is proposed. It is based on an idea that the interaction of the solar wind and photoionized cometary plasma produces strong plasma turbulence in the lower hybrid frequency range which is responsible for the acceleration of suprathermal electrons with energies in the range 100eV up to several keV. A nonlinear theory of the instability responsible for the generation of lower-hybrid electric field, typical energies and flux of suprathermal electrons are obtained. Two possible mechanisms of X-ray production by non-thermal energetic keV electrons are analyized; bremsstrahlung and cometary gas (mostly oxygen) K-shell line radiation. It is shown that for conditions under investigation line radiation is dominant resulting in total X-ray luminosity of 2.5 × 1015erg/sec in excellent agreement with ROSAT observed emission of 3.0 × 1015erg/sec.",
keywords = "acceleration, electron, electrons, emission, field, fluxes, gas, generation, Halley, Hyakutake, instability, ions, line, luminosity, plasma, rosat, shell, solar, solar wind, turbulence, wind, x ray emission, x rays, X ray, comet, radiation",
author = "R. Bingham and J.M. Dawson and V.D. Shapiro and D.A. Mendis and B.J. Kellett",
year = "1998",
doi = "10.1016/S0273-1177(98)00146-X",
language = "English",
volume = "22",
pages = "1043--1047",
journal = "Advances in Space Research",
issn = "0273-1177",
number = "7",

}

Bingham, R, Dawson, JM, Shapiro, VD, Mendis, DA & Kellett, BJ 1998, 'Production of X-rays by comet Hyakutake' Advances in Space Research, vol. 22, no. 7, pp. 1043-1047. https://doi.org/10.1016/S0273-1177(98)00146-X

Production of X-rays by comet Hyakutake. / Bingham, R.; Dawson, J.M.; Shapiro, V.D.; Mendis, D.A.; Kellett, B.J.

In: Advances in Space Research, Vol. 22, No. 7, 1998, p. 1043-1047.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Production of X-rays by comet Hyakutake

AU - Bingham, R.

AU - Dawson, J.M.

AU - Shapiro, V.D.

AU - Mendis, D.A.

AU - Kellett, B.J.

PY - 1998

Y1 - 1998

N2 - An explanation of recent observations of a strong X-ray emission from comet Hyakutake (Science , 194, 1996) is proposed. It is based on an idea that the interaction of the solar wind and photoionized cometary plasma produces strong plasma turbulence in the lower hybrid frequency range which is responsible for the acceleration of suprathermal electrons with energies in the range 100eV up to several keV. A nonlinear theory of the instability responsible for the generation of lower-hybrid electric field, typical energies and flux of suprathermal electrons are obtained. Two possible mechanisms of X-ray production by non-thermal energetic keV electrons are analyized; bremsstrahlung and cometary gas (mostly oxygen) K-shell line radiation. It is shown that for conditions under investigation line radiation is dominant resulting in total X-ray luminosity of 2.5 × 1015erg/sec in excellent agreement with ROSAT observed emission of 3.0 × 1015erg/sec.

AB - An explanation of recent observations of a strong X-ray emission from comet Hyakutake (Science , 194, 1996) is proposed. It is based on an idea that the interaction of the solar wind and photoionized cometary plasma produces strong plasma turbulence in the lower hybrid frequency range which is responsible for the acceleration of suprathermal electrons with energies in the range 100eV up to several keV. A nonlinear theory of the instability responsible for the generation of lower-hybrid electric field, typical energies and flux of suprathermal electrons are obtained. Two possible mechanisms of X-ray production by non-thermal energetic keV electrons are analyized; bremsstrahlung and cometary gas (mostly oxygen) K-shell line radiation. It is shown that for conditions under investigation line radiation is dominant resulting in total X-ray luminosity of 2.5 × 1015erg/sec in excellent agreement with ROSAT observed emission of 3.0 × 1015erg/sec.

KW - acceleration

KW - electron

KW - electrons

KW - emission

KW - field

KW - fluxes

KW - gas

KW - generation

KW - Halley

KW - Hyakutake

KW - instability

KW - ions

KW - line

KW - luminosity

KW - plasma

KW - rosat

KW - shell

KW - solar

KW - solar wind

KW - turbulence

KW - wind

KW - x ray emission

KW - x rays

KW - X ray

KW - comet

KW - radiation

U2 - 10.1016/S0273-1177(98)00146-X

DO - 10.1016/S0273-1177(98)00146-X

M3 - Article

VL - 22

SP - 1043

EP - 1047

JO - Advances in Space Research

T2 - Advances in Space Research

JF - Advances in Space Research

SN - 0273-1177

IS - 7

ER -