查看“Diffuse ionized gas”的源代码

[[electron temperature|电子温度]]

==IFS观测==
*DIG可以用Ha的等值宽度来做判据，EW(Ha)双峰分布
*arXiv1907.08635：讨论了DIG对金属丰度测量的影响

==银河系中的DIG==
*Referred to as the Reynolds layer, or warm ionized medium (WIM);  
*This warm (10^4 K), diffuse (n ~ 0.2 cm~3) gas fills 20% of the disk volume and accounts for most of the mass of ionized gas(90 percent).
:*[[电子密度比]] hot gas要高一点（ Typical values of the central electron density, central cooling time and total mass  for the ETGs are ~ 0.1cm−3, ~ 5 x 10^6 yr and 5 x 1O^9 M⊙）
*In terms of energetics, the Galactic WIM requires at least 10^42 ergs s~1 to remain ionized. This power is more than can be comfortably supplied by supernova shocks, but significantly less than the [[Lyman continuum]] luminosity of massive stars.
*[http://iopscience.iop.org/article/10.1086/306232/meta]