Skip to main content

4 Result(s)

within English Remove this filter Astronomy, Observations and Techniques Remove this filter Astrophysics and Astroparticles Remove this filter R.J.R. Williams Remove this filter Chapter Remove this filter

and

  1. No Access

    Chapter

    MHD Ionization Fronts

    The structure and evolution of Hii regions has been described by Will Henney in this volume. Young massive stars emit copious fluxes of ultraviolet radiation, forming regions of almost entirely ionized gas in ...

    R.J.R. Williams in Diffuse Matter from Star Forming Regions to Active Galaxies (2007)

  2. No Access

    Chapter

    Line Forming Regions in Active Galaxies and Their Nuclei

    The spectra of active galaxies and their nuclei are rich in emission and absorption line features. A major aim of present research is the development of self-consistent hydrodynamic models for the production o...

    J. E. Dyson, R. J. R. Williams, J. J. Perry in Astrophysical and Laboratory Plasmas (1996)

  3. No Access

    Chapter and Conference Paper

    All’s Knot Quiet on the Recombination Front

    Molecular clouds are clumpy on length scales down to the limits of observational resolution. At least some ultracompact Hii regions (UCHiiR) may result from the interaction of a young early type star and this typ...

    M. P. Redman, R. J. R. Williams, J. E. Dyson in Shocks in Astrophysics (1995)

  4. No Access

    Chapter and Conference Paper

    Flows and Shocks in Active Galaxies and their Nuclei

    Observations of active galactic nuclei imply that shocks must be an essential and important part of their structure. We outline the basic observations, and discuss those features which must be addressed by any...

    J. E. Dyson, R. J. R. Williams, J. J. Perry in Shocks in Astrophysics (1995)