nebular lines

nebular lines

[′neb·yə·lər ′līnz]
(astrophysics)
The spectral lines formed in the glow of bright nebulae; they arise from forbidden atomic transition which can take place because of the very low pressure in the nebula itself.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Reference [231] interprets their double-peaked [O i] AA6300,6364 nebular lines of SN 2003jd as an indication of an aspherical axisymmetric explosion viewed from near the equatorial plane, and directly perpendicular to the jet axis, and suggested that this asphericity could be caused by an off-axis GRB jet.
Most of the nebular lines had similar widths, and their profiles indicated that no major asymmetries were present in the ejecta at velocities below 8000 km [s.sup.-1].
From this geometry a strong viewing-angle dependence of nebular line profiles was obtained [110].
Strom et al., "Strong nebular line ratios in the spectra of z ~ 2-3 star forming galaxies: first results from KBSS-mosfire," Astrophysical Journal, vol.
There were "encouraging results or (I should say) indications," Slipher reported to Lowell, "as there appears to be an appreciable displacement of the nebular lines toward the violet." A shift of the lines toward the blue-violet end of the spectrum meant that Andromeda was moving toward Earth.