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Solar wind charge exchange emission in the Earth’s exosphere and its contribution to the XMM-Newton X-ray background

By Jennifer Alyson Carter


The XMM-Newton observatory provides unrivalled capabilities for detecting low surface\ud brightness emission features from extended and diffuse sources, by virtue of its large fieldof-\ud view (15 arcminutes in radius) and high effective area (2150 cm2 at 1 keV). XMM-Newton\ud observes X-ray emission along its entire line-of-sight, whether that be the intended, generally\ud distant astronomical target, or from much closer, for example within the Solar System. The\ud main motivation of this thesis was to characterise one source of locally produced, diffuse Xray\ud emission; that of solar wind charge exchange (SWCX) interactions between solar wind\ud ions and neutral atoms in the Earth’s exosphere.\ud Whilst SWCX is a source of background for astrophysicists concerned with studies of Galactic\ud and extragalactic emission, it provides a diagnostic of the charge-state distribution of\ud the solar wind and mass transport around the Earth’s magnetosheath. This thesis describes\ud an archival study of XMM-Newton observations to identify those affected by temporallyvariable\ud SWCX emission. 3.4% of 3012 XMM-Newton observations studied unambiguously\ud contain a variable exospheric SWCX signal; they are preferentially detected around the subsolar\ud point of the Earth’s magnetosheath.\ud This thesis contains a detailed investigation into the temporal and spectral characteristics\ud of the SWCX-affected observations. It also contains a study of one particular observation,\ud whose emission likely resulted from Coronal Mass Ejection plasma moving through\ud the vicinity of the Earth. A model of exospheric SWCX is presented to provide some predictive\ud power, using the orbital and target-pointing parameters of XMM-Newton during a\ud particular observation. The model is in reasonable agreement with the observed fluxes for\ud approximately 60% of cases.\ud Finally, an idea for a future wide-field X-ray imager with an accompanying plasma monitor\ud and magnetometer is presented. This would observe plasma dynamics in the Earth’s magnetosheath\ud via the mechanism of SWCX emission occurring in this region

Publisher: University of Leicester
Year: 2011
OAI identifier: oai:lra.le.ac.uk:2381/9881

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  1. (2008). A catalog of galaxy clusters observed by XMM-Newton. doi
  2. (2010). A high charge state coronal mass ejection seen through solar wind charge exchange emission as detected by XMM-Newton. doi
  3. (1990). A model for the distribution of material generating the soft X-ray background. doi
  4. (1991). A soft X-ray image of the moon. doi
  5. (2007). A study of Jupiter’s aurorae with XMM-Newton. doi
  6. (2010). An XMM-Newton Survey of the Soft X-ray Background. doi
  7. (2010). Astrophysics Noise: A Space Weather Signal. Eos Trans. doi
  8. (2011). AXIOM: Advanced X-ray Imaging Of the Magnetosphere. ArXiv e-prints.
  9. (2000). Chandra X-ray Observatory (CXO): overview. doi
  10. (2011). Charge Exchange X-ray Emission of M82: Kα triplets of O VII, Ne IX, and Mg XI. ArXiv e-prints. doi
  11. (2010). Charge Transfer Reactions. Space Sci. doi
  12. (2008). Cluster observations of “crater” flux transfer events at the dayside highlatitude magnetopause. doi
  13. (2001). Collisional Plasma Models with APEC/APED: Emission-Line Diagnostics of Hydrogen-like and Helium-like Ions. doi
  14. (1997). Comet Hyakutake x-ray source: Charge transfer of solar wind heavy ions. doi
  15. (2007). Cometary X-rays. Solar wind charge exchange in cometary atmospheres.
  16. (2008). Comparing Suzaku and XMM-Newton Observations of the Soft X-Ray Background: Evidence for Solar Wind Charge Exchange Emission. doi
  17. (2004). Detection of Saturnian X-ray emission with XMM-Newton. doi
  18. (1958). Dynamics of the Interplanetary Gas and Magnetic Fields. doi
  19. (2008). EBIT charge-exchange measurements and astrophysical applications. doi
  20. (2004). EPIC pn-CCD detector aboard XMM-Newton: status of the background calibration. In doi
  21. (2007). Evidence for Solar-Wind Charge-Exchange X-Ray Emission from the Earth’s Magnetosheath. doi
  22. (2009). Global distribution of the solar wind during solar cycle 23: ACE observations. doi
  23. (2000). Heliospheric X-ray Emission Associated with Charge Transfer of the Solar Wind with Interstellar Neutrals. doi
  24. (1966). Hydromagnetic flow around the magnetosphere. doi
  25. (2004). Identification of interplanetary coronal mass ejections at 1 AU using multiple solar wind plasma composition anomalies. doi
  26. (2011). Identifying XMM-Newton observations affected by solar wind charge exchange - Part II. doi
  27. (2008). Identifying XMM-Newton observations affected by solar wind charge exchange. Part I. doi
  28. (2000). Implications of Solar Wind Composition for Cometary X-Rays. doi
  29. (1998). in The Local Bubble and Beyond. doi
  30. (2006). In-Situ Solar Wind and Magnetic Field doi
  31. (1998). Investigation of the composition of solar and interstellar matter using solar wind and pickup ion measurements with doi
  32. (1993). Lyman-alpha observations as a possible means for the detection of the heliospheric interface. doi
  33. (1998). Magnetopause location under extreme solar wind conditions. doi
  34. (2007). Minor ions in the solar wind. doi
  35. (1994). Monte Carlo simulation of the terrestrial hydrogen exosphere. doi
  36. Neutral hydrogen density profiles derived from geocoronal imaging. doi
  37. (1974). Observations of helium in the interplanetary/interstellar wind - The solar-wake effect. doi
  38. (1999). Observations of the response time of high-latitude ionospheric convection to variations in the interplanetary magnetic field using EISCAT and IMP-8 data. doi
  39. (2000). On the Absorption of X-Rays in the Interstellar Medium. doi
  40. (2005). On the sources of fast and slow solar wind. doi
  41. (1998). On the Zero-Level of the Soft X-ray Background. In doi
  42. (2005). One-up on L1: Can X-rays provide longer advanced warning of solar wind flux enhancements than upstream monitors? doi
  43. (1980). Oscillatory behavior of charge transfer cross sections as a function of the charge of projectiles in low-energy collisions. doi
  44. (2007). OVII and OVIII line emission in the diffuse soft X-ray background: heliospheric and galactic contributions. doi
  45. (1992). Photoelectric absorption cross sections with variable abundances. doi
  46. (1998). Photoionization Cross doi
  47. (2011). Possible Charge-exchange X-ray Emission in the Cygnus Loop Detected with Suzaku. doi
  48. (1996). Recent results on the parameters of the interstellar helium from the ULYSSES/GAS experiment. Space Sci. doi
  49. (1981). Selective electron capture into highly stripped Ne and N target atoms after heavy-ion impact. doi
  50. (1995). SOHO: The Solar and Heliospheric Observatory. doi
  51. (2009). Solar Wind Charge Exchange Emission from the Helium Focusing Cone: Model to Data Comparison. doi
  52. (2009). Solar wind charge exchange observed through the lunar exosphere. doi
  53. (1998). Solar Wind Electron Proton Alpha Monitor (SWEPAM) for the Advanced Composition Explorer. doi
  54. (2003). Spatial maps of heliospheric and geocoronal X-ray intensities due to the charge exchange of the solar wind with neutrals. doi
  55. (2004). Spectra of the X-Ray Emission Induced in the Interaction between the Solar Wind and the Heliospheric Gas. doi
  56. (2007). Spectral analysis of the Chandra comet survey. doi
  57. (2009). Statistical evaluation of the flux cross-calibration of the XMM-Newton EPIC cameras. doi
  58. (2009). Suzaku Observations of Abell 1795: Cluster Emission to r 200. doi
  59. (1995). SWE, A Comprehensive Plasma Instrument for the Wind Spacecraft. doi
  60. (2001). Temporal and Spatial Variations of Heliospheric x-ray Emissions Associated with Charge Transfer of the Solar Wind with Interstellar Neutrals. doi
  61. (2001). Temporal variations of geocoronal and heliospheric X-ray emission associated with the solar wind interaction with neutrals. doi
  62. (2004). The 2-8 keV cosmic X-ray background spectrum as observed with XMM-Newton. doi
  63. (1988). The discrete correlation function - A new method for analyzing unevenly sampled variability data. doi
  64. (2008). The EPIC-MOS particle-induced background spectra. doi
  65. (2001). The European Photon Imaging Camera on XMM-Newton: The MOS cameras : The MOS cameras. doi
  66. (2001). The European Photon Imaging Camera on XMM-Newton: The pn-CCD camera.
  67. (1974). The Extraterrestrial UV-Background and the Nearby Interstellar Medium. doi
  68. (1995). The Global Geospace Science Program and Its Investigations.
  69. (2004). The heliospheric soft X-ray emission pattern during the ROSAT survey: Inferences on Local Bubble hot gas. doi
  70. (2011). The Integrated Diffuse X-ray Emission of the Carina Nebula Compared to Other Massive Star-forming Regions. ArXiv e-prints. doi
  71. (1971). The Interplanetary Hydrogen Cone and its Solar Cycle Variations.
  72. (2008). The Lunar X-ray Observatory (LXO). doi
  73. (2009). The Origins and Physical Properties of the Complex of Local Interstellar Clouds. Space Sci. doi
  74. (2009). The Solar Wind Charge-eXchange Contribution to the Local Soft X-ray Background. Model to Data Comparison in the 0.1–1.0 keV Band. Space Science Reviews, doi
  75. (2002). The solar wind composition throughout the solar cycle: A continuum of dynamic states. doi
  76. The Southern High-Speed Stream: Results from the SWICS Instrument on Ulysses. doi
  77. (2009). The trouble with the Local Bubble. doi
  78. (2007). The XMM-Newton EPIC background and the production of background blank sky event files. doi
  79. (2003). The XMM-Newton EPIC background: Production of background maps and event files. doi
  80. (2009). The XMM-Newton serendipitous survey. V. The Second XMM-Newton serendipitous source catalogue. doi
  81. Timing accuracy for the simple planar propagation of magnetic field structures in the solar wind. doi
  82. (2004). X-Ray and extreme ultraviolet emissions from comets. doi
  83. (2002). X-ray background measurements with XMM-Newton EPIC. doi
  84. (2006). X-ray emission from the terrestrial magnetosheath including the cusps. doi
  85. (2003). X-ray emission from the terrestrial magnetosheath. doi
  86. (1997). X-ray emissions from comets detected in the Ro¨ntgen X-ray satellite all-sky survey. doi
  87. (2006). X-Rays From Mars. doi
  88. X-rays from Saturn: a study with XMM-Newton and Chandra over the years 2002-05. doi
  89. (2007). X-rays from solar system objects. doi
  90. (2008). X-rays from Venus observed with Chandra. doi
  91. (2005). XMM-Newton data processing for faint diffuse emission. Proton flares, exposure maps and report on EPIC MOS1 bright CCDs contamination. doi
  92. (2004). XMM-Newton Observation of Solar Wind Charge Exchange Emission. doi
  93. (2001). XMM-Newton observatory. I. The spacecraft and operations. doi
  94. (1999). XMM’s X-ray telescopes. doi

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