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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27238
Title: Highly Accreting Quasars at High Redshift
Authors: Martínez-Aldama, Mary L.
Del Olmo, Ascensión
MARZIANI, Paola 
Sulentic, Jack W.
Negrete, C. Alenka
Dultzin, Deborah
Perea, Jaime
D'ONOFRIO, MAURO
Issue Date: 2017
Journal: FRONTIERS IN ASTRONOMY AND SPACE SCIENCES 
Number: 4
First Page: 65
Abstract: We present preliminary results of a spectroscopic analysis for a sample of type 1 highly accreting quasars (LLedd>0.2) at high redshift, z 2-3. The quasars were observed with the OSIRIS spectrograph on the GTC 10.4 m telescope located at the Observatorio del Roque de los Muchachos in La Palma. The highly accreting quasars were identified using the 4D Eigenvector 1 formalism, which is able to organize type 1 quasars over a broad range of redshift and luminosity. The kinematic and physical properties of the broad line region have been derived by fitting the profiles of strong UV emission lines such as AlIII, SiIII and CIII. The majority of our sources show strong blueshifts in the high-ionization lines and high Eddington ratios which are related with the productions of outflows. The importance of highly accreting quasars goes beyond a detailed understanding of their physics: their extreme Eddington ratio makes them candidates standard candles for cosmological studies.
URI: http://hdl.handle.net/20.500.12386/27238
URL: https://www.frontiersin.org/articles/10.3389/fspas.2017.00065/full
ISSN: 2296-987X
DOI: 10.3389/fspas.2017.00065
Bibcode ADS: 2017FrASS...4...65M
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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