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arXiv · 1103.5265

Clumpology of Starbursts in the WiggleZ Dark Energy Survey

Emily Wisnioski·Karl Glazebrook·Chris Blake·The WiggleZ Team
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Abstract

We have observed Halpha emission from a sample of 13 star-forming galaxies from the WiggleZ Dark Energy Survey in the redshift range z~1.2-1.5 and stellar mass range 9.8<log(M_*/M_sun)<11.6 with the integral field spectrograph OSIRIS on Keck, taking advantage of Laser Guide Star Adaptive Optics. We detect multiple emission, 1-2 kpc size sub-components, or 'clumps' within the Halpha spatial emission in 4 galaxies, extended emission in 4 galaxies and compact spheroidal emission in 5 galaxies. Considering our results in the context of unstable disk formation and a merger sequence, we find evidence of ordered orbital motion in the majority of galaxies as would be found in unstable gaseous disks.

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Emily Wisnioski, Karl Glazebrook, Chris Blake, The WiggleZ Team. 2011-03-28. Clumpology of Starbursts in the WiggleZ Dark Energy Survey. https://arxiv.org/abs/1103.5265

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