||H I Structure in the Milky Way: From Large to Small
||438, The Dynamic Interstellar Medium: A Celebration of the Canadian Galactic Plane Survey
||McClure-Griffiths, N. M.
||Galactic interstellar medium (ISM) studies have undergone a
renaissance in the past ten years due largely to recent large-scale
surveys of the Galactic ISM. New surveys of neutral hydrogen (H I),
in particular the International Galactic Plane Survey (IGPS), excel
because of their exceptional spatial dynamic range, combining
single-dish and interferometric data for arcminute resolution
imaging over areas of many degrees. These surveys are allowing us to
probe the physics of the global ISM in more detail than ever before.
Using these surveys we are able to probe parsec-scale features on
the very largest, kiloparsec-scale, objects. For example, we can
now study the gradual process by which H I supershells dissolve
through the action of gas instabilities and the formation of very
cold structures along H I supershells. The IGPS, together with
recent all-sky H I surveys, enable a holistic approach to studies
of the evolution of the ISM. In this contribution I focus on some
of the fantastic results to have come out of the IGPS and other
recent H I surveys on topics ranging from the large-scale H I
structure of the Milky Way, the role of large deterministic
structures in forming small-scale structure and the structure of the
cold neutral medium.