Other
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aps..nws.b5010k&link_type=abstract
American Physical Society, 10th Annual Meeting of the Northwest Section of APS, May 15-17, 2008, abstract #B5.010
Other
Scientific paper
We present observations of the ionized interstellar medium of 39 face-on spiral galaxies obtained with the WIYN 3.5-m telescope coupled to the Sparsepak integral field unit. We investigate the relationship between the vertical motions of the gas, as measured from the H-alpha line-widths, and the local star formation activity, traced by the H-alpha intensity. Several trends were found: 1) there exists a threshold H-alpha intensity below which the line-width is uncorrelated with the star formation activity and is presumably dominated by other thermal and turbulent processes 2) above this threshold many galaxies exhibit a strong positive correlation between the H-alpha line width and intensity and 3) even higher H-alpha intensities demonstrated a secondary trend line, in which the intensity leveled-off with increasing H-alpha line-width.
Andersen David
Bershady Mathew
Ketchum Christina
Tufte Stephen
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