Sentence examples for forbidden lines from inspiring English sources

See also forbidden lines.

The spectrum of the planetary nebula is basically the same as that of the H II region; it contains bright lines from hydrogen and helium recombinations and the bright, collisionally excited forbidden lines and faint recombination lines of other ions.

Nebulium, hypothetical chemical element whose existence was suggested in 1868 by the English astronomer Sir William Huggins as one possible explanation for the presence of unidentified (forbidden) lines (at 3,726, 3,729, 4,959, and 5,007 angstroms wavelength) in the spectra of gaseous nebulae.

Using the resonance, intercombination and forbidden lines of the few prominent helium-like ions, we infer a density greater than 2 × 1012 cm−3 and a temperature of ∼2 MK for the oxygen and neon line emitting regions in the accretion column of AM Her.

The spectrographical analysis of the light emitted on the anode during the anode effect (ae) in molten cryolite leads to atomic line spectra (with some ionic lines for the largest cd that we have used), rather strongly perturbed, and appearance of forbidden lines (by selection rules).

UV coronas forbidden lines, e.g. Fe XXI 13541, Fe XII 1242, 1349 Å, Fe XVIII 975 Å, and Fe XIX 1118 Å are commonly detected in active dwarfs and giants; these lines currently provide the only resolved spectroscopic diagnostics of conditions within stellar coronae.

Not only had she lied to him about her job, but she had crossed a forbidden line.

We will burn your cities down.'" Baldwin and Styron agreed that "the writer should be free to demolish the barrier of colour, to cross the forbidden line and write from the point of view of someone with a different skin".

"A common conviction dominated our attitude toward the writing of fiction," he explains, "and this was that in the creation of novels and stories the writer should be free to demolish the barrier of color, to cross the forbidden line and write from the point of view of someone with a different skin.

Note that there is a strong [Ar II] forbidden line at 7.0 μm.

Observed emissions are forbidden line emissions of S+ ions (λλ 671.6 and 673.1 nm) in the plasma torus.