Quasars as Cosmological Standard Candles

Quasars as Cosmological Standard Candles

We propose the use of quasars with accretion rate near the Eddington ratio (extreme quasars) as standard candles. The selection criteria are based on the Eigenvector 1 (E1) formalism. Our first sample is a selection of 334 optical quasar spectra from the SDSS DR7 database with a S/N > 20. Usi...

Full description

Bibliographic Details
Main Authors: C. Alenka Negrete, Deborah Dultzin, Paola Marziani, Jack W. Sulentic, Donají Esparza-Arredondo, Mary L. Martínez-Aldama, Ascensión Del Olmo
Format: Article
Language:English
Published: Frontiers Media S.A. 2017-12-01
Series:Frontiers in Astronomy and Space Sciences
Subjects:
quasars: general
quasars: emission lines
quasars: broad lines
quasar: extreme accretors
quasars: NLSy1
Online Access:http://journal.frontiersin.org/article/10.3389/fspas.2017.00059/full

Internet

http://journal.frontiersin.org/article/10.3389/fspas.2017.00059/full

Similar Items