The LISM: Progress Report on Observations and Modelling

D. Breitschwerdt, M. Avillez, M. J. Freyberg, P. Mendes, J. Alves

Publications: Contribution to journalArticle


The LISM consists of the Local Cloud surrounding the solar system, and on a larger scale of the Local Bubble (LB), an X-ray emitting cavity of about 100 pc radius. Both exert a substantial influence on the heliosphere, by keeping it under pressure, as well as injecting particles. Here we will report on recent progress in observations, mainly in soft X-rays, with XMM-Newton, which provide strong constraints on LB models. The latter include non-equilibrium ionization, as well as most recent 3D high resolution simulations on parallel processors. We are able to follow the evolution of the LB in conjunction with the neighbouring Loop I superbubble, assuming a multi-supernova origin, and reproduce the morphology of the LB, as well as X-ray spectral features and OVI column densities. Still existing discrepancies between data and models will be discussed in detail.
Original languageEnglish
Pages (from-to)3937
JournalCOSPAR Scientific Assembly
Publication statusPublished - 2004

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