High-velocity Outflows without AGN Feedback: Eddington-limited Star Formation in Compact Massive Galaxies

Type Journal Article
Names Aleksandar M. Diamond-Stanic, John Moustakas, Christy A. Tremonti, Alison L. Coil, Ryan C. Hickox, Aday R. Robaina, Gregory H. Rudnick, Paul H. Sell
Publication The Astrophysical Journal Letters
Volume 755
Pages L26
Journal Abbreviation The Astrophysical Journal Letters
Date August 1, 2012
DOI 10.1088/2041-8205/755/2/L26;
Short Title High-velocity Outflows without AGN Feedback
URL http://adsabs.harvard.edu/abs/2012ApJ...755L..26D
Library Catalog NASA ADS
Abstract We present the discovery of compact, obscured star formation in galaxies at z ~ 0.6 that exhibit >~ 1000 km s-1 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 ΣSFR ≈ 3000 M &sun; yr-1 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.
Tags GALAXIES: EVOLUTION, Galaxies: ISM, galaxies: kinematics and dynamics, galaxies: starburst
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