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Dichotomy of radio loud and radio quiet quasars in four dimensional eigenvector one (4DE1) parameter space

Published online by Cambridge University Press:  29 January 2021

Shimeles Terefe ,
Ascensión del Olmo ,
Paola Marziani  and
Mirjana Pović
Shimeles Terefe
Affiliation:
Ethiopian Space Science and Technology Institute (ESSTI), Addis Ababa, Ethiopia email: shimeles11@gmail.com
Ascensión del Olmo
Affiliation:
Instituto de Astrofisica de Andalucía (IAA-CSIC), Granada, Spain
Paola Marziani
Affiliation:
Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico di Padova, Padova, Italy
Mirjana Pović
Affiliation:
Ethiopian Space Science and Technology Institute (ESSTI), Addis Ababa, Ethiopia email: shimeles11@gmail.com Instituto de Astrofisica de Andalucía (IAA-CSIC), Granada, Spain
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Abstract

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Recent work has shown that it is possible to systematize quasars (QSOs) spectral diversity in 4DE1 parameter space. The spectra contained in most of the surveys have low signal to noise ratio which fed the impression that all QSO’s are spectroscopically similar. Exploration of 4DE1 parameter space gave rise to the concept of two populations of QSOs that present important spectroscopic differences. We aim to quantify broad emission line differences between radio quiet and radio loud sources by exploiting more complete samples of QSO with spectral coverage in Hβ, MgII and CIV emission lines. We used a high redshift sample (0.35 < z < 1) of strong radio emitter QSOs observations from Calar Alto Observatory in Spain.

Keywords

Active galaxiesquasarsradio loud and radio quiet quasarsfour dimensional eigenvecter 1 parameter space
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 351 - 354
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

Footnotes

†

Based on observations obtained at the CAHA Observatory, Calar Alto, Spain

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