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Title: CONDITIONS FOR SUPERNOVAE-DRIVEN GALACTIC WINDS

We point out that the commonly assumed condition for galactic outflows, that supernovae (SNe) heating is efficient in the central regions of starburst galaxies, suffers from invalid assumptions. We show that a large filling factor of hot (≥10{sup 6} K) gas is difficult to achieve through SNe heating, irrespective of the SN's initial gas temperature and density, its uniformity, or its clumpiness. We instead suggest that correlated supernovae from OB associations in molecular clouds in the central region can drive powerful outflows if the molecular surface density is >10{sup 3} M {sub ☉} pc{sup –2}.
Authors:
 [1] ;  [2]
  1. Raman Research Institute, Sadashiva Nagar, Bangalore 560080 (India)
  2. Department of Physics, Southern Federal University, Rostov on Don, 344090 (Russian Federation)
Publication Date:
OSTI Identifier:
22215383
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 777; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CLOUDS; DENSITY; GALAXIES; HEATING; SOLAR WIND; SUPERNOVA REMNANTS; SUPERNOVAE