EAS Publications Series
Volume 56, 2012The Role of the Disk-Halo Interaction in Galaxy Evolution: Outflow vs. Infall?
|Page(s)||197 - 200|
|Section||Evidence for a Disk-Halo Connection in Galaxies|
|Published online||17 September 2012|
Miguel A. de Avillez (ed)
EAS Publications Series, 56 (2012) 197–200
Kinematics of Multiphase Extraplanar Gas in Spiral Galaxies
ASTRON, PO Box 2, 7990 AA Dwingeloo, The Netherlands ;
Multiphase gas has been observed at large vertical distances above the star forming disk in several nearby spirals. Much of this gas is likely a by-product of star formation processes in the disk, but some may trace gas accretion from the intergalactic medium. High quality observations of the distribution and kinematics of this extraplanar gas shed light on the relative importance of these critical processes, and their contribution to the redistribution and replenishment of the galaxy’s reservoir of star forming material. We present recent observations of the kinematics of ionized and neutral extraplanar gas in several nearby galaxies. The balance between infall and outflow implied by the observations is discussed.
© EAS, EDP Sciences, 2012