Consistency study of high- and low-accreting Mg II quasars: no significant effect of the Fe II to Mg II flux ratio on the radius–luminosity relation dispersion

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00129255" target="_blank" >RIV/00216224:14310/22:00129255 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1093/mnras/stac1940" target="_blank" >https://doi.org/10.1093/mnras/stac1940</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stac1940" target="_blank" >10.1093/mnras/stac1940</a>

Result language

angličtina

Original language name

Consistency study of high- and low-accreting Mg II quasars: no significant effect of the Fe II to Mg II flux ratio on the radius–luminosity relation dispersion

Original language description

We use observations of 66 reverberation-measured Mg II quasars (QSOs) in the redshift range 0.36 ≤ z ≤ 1.686 – a subset of the 78 QSOs we previously studied that also have RFeII (flux ratio parameter of UV Fe II to Mg II that is used as an accretion-rate proxy) measurements – to simultaneously constrain cosmological model parameters and QSO two-parameter and three-parameter radius–luminosity (R–L) relation parameters in six different cosmological models. We find that these QSO R–L relation parameters are independent of the assumed cosmological model and so these QSOs are standardizable through the R–L relations. Also: (1) With the two-parameter R–L relation, we find that the low-RFeII and high-RFeII data subsets obey the same R–L relation within the error bars. (2) Extending the two-parameter R–L relation to a three-parameter one does not result in the hoped-for reduction in the intrinsic dispersion of the R–L relation. (3) Neither of the three-parameter R–L relations provide a significantly better fit to the measurements than does the two-parameter R–L relation. These are promising results for the ongoing development of Mg II cosmological probes. The first and third of these results differ significantly from those we found elsewhere from analyses of reverberation-measured H β QSOs.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GX21-13491X" target="_blank" >GX21-13491X: Exploring the Hot Universe and Understanding Cosmic Feedback</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Volume of the periodical

515

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

20

Pages from-to

3729-3748

UT code for WoS article

000838819900011

EID of the result in the Scopus database

2-s2.0-85136300020