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2010MNRAS.403.1719W - Mon. Not. R. Astron. Soc., 403, 1719-1728 (2010/April-3)
Ionized gas in the starburst core and halo of NGC 1140.
WESTMOQUETTE M.S., GALLAGHER III J.S. and DE POITIERS L.
Abstract (from CDS):
A broad component [100 ≲ full width at half-maximum ≲ 230km/s] to the Hα line is identified throughout galaxy disc out to greater than 2kpc. Based on recent work looking at the origins of this component, we conclude that it is produced in turbulent mixing layers on the surfaces of cool gas knots embedded within the interstellar medium, set up by the impact of the ionizing radiation and fast-flowing winds from young massive star clusters. Our data suggest a physical limit to the radius where the broad emission line component is significant, and we propose that this limit marks a significant transition point in the development of the galactic outflow, where turbulent motion becomes less dominant. This mirrors what has recently been found in another similar irregular starburst galaxy NGC 1569.
Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS
Journal keyword(s): ISM: jets and outflows - ISM: kinematics and dynamics - galaxies: individual: NGC 1140 - galaxies: ISM - galaxies: starburst
Simbad objects: 5
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