Physics 901 Colloquium (Internal to Department)

The Disk-Halo Connection in Spiral Galaxies

Tara Chaves
Queen's University

Time
Mon. November 4, 2002     1:30 PM     Stirling A

Abstract

Recent studies of nearby edge-on spiral galaxies have revealed active interstellar media with very large, energetic structures of gas joining the disks to the halo regions. It is still not well known how such features originate. Competing formation models include inflation by supernovae or high velocity cloud impacts. A new buoyancy model will be examined in my PhD thesis. When these disk-halo connection features are studied in an emission line, we obtain information on the kinematics of the features. In addition to giving information on the motion and expansion of the features themselves, the kinematics of the features can be a powerful probe of the disk and halo dynamics and any transition regions in between.

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