Broad absorption line | Article about broad absorption line by The Free Dictionary
broad absorption line
broad absorption line (BAL) quasar
References in periodicals archive
The width of this "broad absorption line
" (BAL) measures the speed of the quasar's wind.
Diffuse Interstellar Bands (DIB) are broad absorption lines
in the spectra of stars indicating the existence of clouds of complex, unidentified molecules in the space between the stars.
The two pairs of broad absorption lines
indicate gas moving toward us at 500 and 1,300 km per second.