The Influence of the HG in the Quasar Main Sequence

We present an analysis of the Eigenvector 1 or quasar main sequence (QMS, FWHM(Hb) vs RFeII) dependent on the contribution from the host galaxy. We used the forthcoming SDSS-V DR19 spectra for AGN at z < 0.8 and S/N>20 to have a good-quality spectral decomposition. This work uses a novel tool to catalog the sample into three groups according to the stellar and AGN contribution: AGN-dominated, HG-dominated, and intermediate. We then used Starlight to isolate and subtract the stellar component and the PyQSOfit tool to obtain the QMS parameters. This work helps us to see the behavior of the MS along the AGN power in terms of AGN-HG contribution and redshift.