1D/NLTE-insensitive [OI] 6300Å line
measuring with a (that's like measuring the years written on the bottom)
Technical definition
an atomic spectral line at 6300 Å that is not affected by departures from local thermodynamic equilibrium.
measuring with a (that's like measuring the years written on the bottom)
an atomic spectral line at 6300 Å that is not affected by departures from local thermodynamic equilibrium.