changing the emission line velocity width

Apologies if this information is in the documentation or in previously closed tickets, but I'd like to change (reduce) the velocity width of the emission lines without smoothing the stellar continuum. E.g., in the example below I would like to change the velocity width so the [OII] doublet is well-resolved.

According to the docs, smooth_velocity=True but smooth_lsf=False, by default, so there shouldn't be any supplemental smoothing. But clearly the lines are pretty broad (hard to tell, but I would guess >>100 km/s).

Any advice or guidance would be much-appreciated!

import fsps
import matplotlib.pyplot as plt

sp = fsps.StellarPopulation(compute_vega_mags=False, 
                            add_dust_emission=True,
                            add_neb_emission=True,
                            nebemlineinspec=True,
                            imf_type=1, # Chabrier
                            dust_type=0,
                            dust_index=-0.7,
                            sfh=0,
                            zcontinuous=1)
wave, flux = sp.get_spectrum(tage=1e-3, peraa=True)

I = (wave > 3697.) * (wave < 3757.)
fig, ax = plt.subplots()
ax.plot(wave[I], flux[I])
ax.set_xlabel('Wavelength (Angstrom)')
ax.set_ylabel('Flux')
fig.savefig('fsps-linewidth.png')

Leggi prima la documentazione di stellarpop_api ed esegui l'esempio di spettro fornito. Traccia come smooth_velocity, smooth_lsf e nebemlineinspec influiscono sul continuo stellare e sulle righe di emissione; il lavoro è completo quando viene identificato un modo supportato per restringere il doppietto [OII] senza applicare smoothing al continuo, oppure viene documentato che questo comportamento richiede una modifica separata.