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25 April 2024

» arxiv » 1205.2368

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High-Velocity Outflows Without AGN Feedback: Eddington-Limited Star Formation in Compact Massive Galaxies
Aleksandar M. Diamond-Stanic ; John Moustakas ; Christy A. Tremonti ; Alison L. Coil ; Ryan C. Hickox ; Aday R. Robaina ; Gregory H. Rudnick ; Paul H. Sell ;
Date:	10 May 2012
Abstract:	We present the discovery of compact, obscured star formation in galaxies at z 0.6 that exhibit >1000 km/s outflows. Using optical morphologies from the Hubble Space Telescope and infrared photometry from the Wide-field Infrared Survey Explorer, we estimate star formation rate (SFR) surface densities that approach Sigma_SFR 3000 Msun/yr/kpc^2, comparable to the Eddington limit from radiation pressure on dust grains. We argue that feedback associated with a compact starburst in the form of radiation pressure from massive stars and ram pressure from supernovae and stellar winds is sufficient to produce the high-velocity outflows we observe, without the need to invoke feedback from an active galactic nucleus.
Source:	arXiv, 1205.2368
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