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Autre Publication Scientifique Année : 2009

Thermal Emission or Charge Exchange from the North Polar Spur?

Résumé

We propose a coupled observation of the North Polar Spur (NPS) and a nearby off-spur region in order to determine whether the soft X-ray spectrum of the NPS is solely produced by hot plasma thermal emission, or whether some fraction of the emission is produced by charge exchange (CX) collisions between neutral particles and ions within the hot gas envelope of the Loop I/NPS superbubble. Our goal is to confirm and measure the shift in energy of the He-like O VII and Ne IX triplet centroids measured at low significance in previous observations of the NPS with XMM-Newton and Suzaku. These shifts are predicted by the CX emission models but not in thermal emission models. We request the new ON/OFF observations of the NPS in order to avoid large spatial variations of the cosmic
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Dates et versions

hal-02329196 , version 1 (23-10-2019)

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Dimitra Koutroumpa. Thermal Emission or Charge Exchange from the North Polar Spur?. 2009. ⟨hal-02329196⟩
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