Optical spectral properties of radio loud quasars along the main sequence. Issue Volume 15:Issue S356(2019) (October 2019)

• Record Type: Journal Article
• Authors: del Olmo, Ascensión; Marziani, Paola; Ganci, Valerio; D'Onofrio, Mauro; Bon, Edi; Bon, Natasa; Negrete, Alenka C.
• Editors: Pović, Mirjana; Marziani, Paola; Masegosa, Josefa; Netzer, Hagai; Negu, Seblu H.; Tessema, Solomon B.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 15:Issue S356(2019)
• Page Start: 310
• Page End: 313
• Publication Date: 2019-10
• Subjects: quasars, -- radio-loud, -- star formation; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921320003191
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: 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.