Fig. 4.
Left: APOGEE spectra (in air wavelength) in a region containing several 12C14N lines, indicated by vertical shaded regions. The magenta line show the spectrum of N-normal stars with similar atmospheric parameters as the N-rich stars. Right: example of our spectral synthesis analysis (red squares) around the line 1.5317 μm (blue light shadow region). The A(N) at 1.5317 μm is marked.
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