CONDITIONS FOR SUPERNOVAE-DRIVEN GALACTIC WINDS

Journal Article · Fri Nov 01 00:00:00 EDT 2013 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/777/1/L12· OSTI ID:22215383

Nath, Biman B. ^[1]; Shchekinov, Yuri ^[2]

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1. Raman Research Institute, Sadashiva Nagar, Bangalore 560080 (India)
2. Department of Physics, Southern Federal University, Rostov on Don, 344090 (Russian Federation)

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}.

• OSTI ID: 22215383
• Journal Information: Astrophysical Journal Letters, Vol. 777, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CLOUDS
DENSITY
GALAXIES
HEATING
SOLAR WIND
SUPERNOVA REMNANTS
SUPERNOVAE