Physical properties of NGC 253 and its superwind.
|d: distance [Mpc]||2.6a−3.9|
|LIR: infrared luminosity [L⊙]||1.7 × 1010|
|SFR: star-forming rate [M⊙ yr−1]||3|
|β: mass loading factor||12|
|Ṁ: mass outflow [M⊙ yr−1]||9|
|Lγ(E > 200 MeV): γ-ray luminosity [erg s−1]||4.3 × 1039|
|Tc: temperature of the central region [K]b||2 × 107|
|SW region parameters||Value|
|R: radius of the SW bubble [kpc]||5|
|Lx: X-ray luminosity [erg s−1]||5 × 1038|
|Th: temperature of the gas in the bubble [K]||3 × 106|
|n: particle density [cm−3]||2 × 10−3|
|B: magnetic field [μG]||5|
|vA: Alfvén velocity [km s−1]||240|
|vs: sound speed [km s−1]||164|
Notes. (a) The value adopted in this paper. (b) Temperature estimated with Eq. (10) adopting β = 12 and α = 0.75.
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