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Optical spectral properties of radio loud quasars along the main sequence

Published online by Cambridge University Press:  29 January 2021

Ascensión del Olmo ,
Paola Marziani ,
Valerio Ganci ,
Mauro D’Onofrio ,
Edi Bon ,
Natasa Bon  and
Alenka C. Negrete
Ascensión del Olmo
Affiliation:
Instituto de Astrofsica de Andaluca, IAA-CSIC, Granada, Spain, email: [email protected]
Paola Marziani
Affiliation:
INAF, Astronomical Observatory of Padova, Padova, Italy
Valerio Ganci
Affiliation:
INAF, Astronomical Observatory of Padova, Padova, Italy Dipartimento di Fisica e Astronomia, University of Padova, Padova, Italy
Mauro D’Onofrio
Affiliation:
Dipartimento di Fisica e Astronomia, University of Padova, Padova, Italy
Edi Bon
Affiliation:
Astronomical Observatory Belgrade, Belgrade, Serbia
Natasa Bon
Affiliation:
Astronomical Observatory Belgrade, Belgrade, Serbia
Alenka C. Negrete
Affiliation:
Instituto de Astronoma - UNAM, CDMX, México
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Abstract

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We analyze the optical properties of Radio-Loud quasars along the Main Sequence (MS) of quasars. A sample of 355 quasars selected on the basis of radio detection was obtained by cross-matching the FIRST survey at 20cm and the SDSS DR12 spectroscopic survey. We consider the nature of powerful emission at the high-Fe ii end of the MS. At variance with the classical radio-loud sources which are located in the Population B domain of the MS optical plane, we found evidence indicating a thermal origin of the radio emission of the highly accreting quasars of Population A.

Keywords

quasarsradio-loudstar formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 310 - 313
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

Footnotes

†

Present address: Institute of Physics, University of Cologne, Germany

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