ATTENZIONE! IL REPOSITORY E’ APERTO ESCLUSIVAMENTE ALL’IMMISSIONE DEI RAPPORTI TECNICI (COLLEZIONE 4.01). NON E’ POSSIBILE INSERIRE PRODOTTI IN TUTTE LE ALTRE COLLEZIONI, A CAUSA DI PROBLEMI TECNICI. THE REPOSITORY IS OPEN EXCLUSIVELY FOR THE SUBMISSION OF TECHNICAL REPORTS (COLLECTION 4.01). SUBMISSIONS TO ALL OTHER COLLECTIONS ARE TEMPORARILY UNAVAILABLE, DUE TO TECHNICAL ISSUES.
 

Quasars: From the Physics of Line Formation to Cosmology

Journal
Date Issued
2019
Author(s)
•
Bon, Edi
•
Bon, Natasa
•
del Olmo, Ascension
•
Martínez-Aldama, Mary
•
D'ONOFRIO, MAURO
•
Dultzin, Deborah
•
Negrete, C.
•
DOI
Abstract
Quasars accreting matter at very high rates (known as extreme Population A [xA] or super-Eddington accreting massive black holes) provide a new class of distance indicators covering cosmic epochs from the present-day Universe up to less than 1 Gyr from the Big Bang. The very high accretion rate makes it possible that massive black holes hosted in xA quasars radiate at a stable, extreme luminosity-to-mass ratio. This in turns translates into stable physical and dynamical conditions of the mildly ionized gas in the quasar low-ionization line emitting region. In this contribution, we analyze the main optical and UV spectral properties of extreme Population A quasars that make them easily identifiable in large spectroscopic surveys at low-z (z < 1) and intermediate-z (2 < z < 2.6), and the physical conditions that are derived for the formation of their emission lines. Ultimately, the analysis supports the possibility of identifying a virial broadening estimator from low-ionization line widths, and the conceptual validity of the redshift-independent luminosity estimates based on virial broadening for a known luminosity-to-mass ratio.
Volume
7
Issue
1
Start page
18
Uri
Url
Issn Identifier
2218-2004
Ads BibCode
2019Atoms...7...18M
Rights
open.access
File(s)
Loading...
Thumbnail Image
Name

1901.10032.pdf

Description
postprint
Size

706.27 KB

Format

Adobe PDF

Checksum (MD5)

85b5ffbc0ea3f01a55600a4d703f48c4

Loading...
Thumbnail Image
Name

atoms-07-00018-v2.pdf

Description
Pdf editoriale
Size

688.26 KB

Format

Adobe PDF

Checksum (MD5)

61bed7d42c858b565d15e2d0b5bc0c76