We investigate a sample of quasars from the Sloan Digital Sky Survey. The $R_{FeII}$ is the ratio of the equivalent widths of Fe II to H$\beta$. FWHM H$\beta$ vs. this ratio is one of the correlations that is characteristic of the so-called Quasar Main Sequence.
We select sources brighter than $m_{i} = 18^{mag}$ and $m_{r} = 18^{mag}$ at redshift lower than 0.7. We write a script to automate analysis of AGN optical spectra.
We fit the spectra taking into account the starlight contamination, independent reddening of the starlight and of the disk continuum and consider several Fe II templates.
We will compare our results to Shen & Ho (2014) diagram. Finally, we will compare the properties of strong Fe II emitters to the properties of the whole sample, with the aim to identify the key physical mechanism leading to efficient Fe II production. Work is in progress.
Volume 328 -
Revisiting narrow-line Seyfert 1 galaxies and their place in the Universe (NLS1-2018) -
Poster
FAQS: Fitting Automatic Quasar Spectra
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Pre-published on:
November 03, 2018
Published on:
December 21, 2018
Abstract
DOI: https://doi.org/10.22323/1.328.0052
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.