Kellett, B.J. and Bingham, R. (2005) High velocity clouds interacting with galactic halo plasma as a source of X-ray emission. Journal of Plasma Physics, 71 (2). pp. 111-118. ISSN 0022-3778Full text not available in this repository. (Request a copy from the Strathclyde author)
Several high velocity clouds (HVCs) are now known to be soft X-ray sources. In this paper we suggest that all interaction between the HVCs and the galactic halo is leading to plasma instabilities that generate energetic electrons which in turn generate X-ray emission. This process is essentially analogous to the interaction process between cornets and non-magnetized planets with the solar wind which is also known to lead to the generation of X-rays. We show that for reasonable assumptions about the galactic halo magnetic field, the X-ray emission can be converted into an estimate of the mean galactic halo density it the position of the cloud. This provides a method for estimating the baryonic mass of the plasma halo provided that we call obtain a good estimate for the distance to the HVC.
|Keywords:||high velocity clouds , soft X-ray sources, energetic electrons , solar wind , galactic halo density , X-ray emission , Physics, Condensed Matter Physics|
|Subjects:||Science > Physics|
|Department:||Faculty of Science > Physics|
|Depositing user:||Pure Administrator|
|Date Deposited:||13 Jul 2011 08:55|
|Last modified:||04 May 2016 18:34|