The Main Sequence View of Quasars Accreting at High Rates: Influence of Star Formation

DOI: 
10.3847/2515-5172/abe46a
Publication date: 
24/02/2021
Main author: 
Marziani, Paola
IAA authors: 
del Olmo, Ascensión;Machado, Alice Deconto
Authors: 
Marziani, Paola;Sniegowska, Marzena;Panda, Swayamtrupta;Czerny, Bożena;Negrete, C. Alenka;Dultzin, Deborah;Garnica, Karla;Martínez-Aldama, Mary Loli;del Olmo, Ascensión;D'Onofrio, Mauro;Machado, Alice Deconto;Ganci, Valerio;Extreme Team
Journal: 
Research Notes of the American Astronomical Society
Publication type: 
Article
Volume: 
5
Pages: 
25
Abstract: 
Highly accreting quasars show fairly distinctive properties in their optical, UV, and X spectra, and are easy to recognize because of their specific location in the quasar main sequence: they are the strongest optical FeII emitters. They show a surprisingly high rate of radio detections and, at variance with the classical radio-loud (jetted) sources, the origin of their radio emission is probably "thermal." The chemical composition of the broad line emitting gas implies high metallicity values, above 10 times solar. A fraction of highly accreting quasars at intermediate and high redshift might therefore be in a particular evolutionary stage that is unobscured albeit still involving a contribution of nuclear and circum-nuclear star formation in their multifrequency properties. * Contribution presented at the 237th meeting of the AAS.
Database: 
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2021RNAAS...5...25M/abstract
ADS Bibcode: 
2021RNAAS...5...25M
Keywords: 
Active galactic nuclei;16