Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius–luminosity relation luminosity distances

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00134165" target="_blank" >RIV/00216224:14310/23:00134165 - isvavai.cz</a>

Result on the web

<a href="https://arxiv.org/pdf/2212.10483.pdf" target="_blank" >https://arxiv.org/pdf/2212.10483.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stad1040" target="_blank" >10.1093/mnras/stad1040</a>

Result language

angličtina

Original language name

Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius–luminosity relation luminosity distances

Original language description

We use measurements of 59/58 quasars (QSOs), over a redshift range 0.0041 &lt;= z &lt;= 1.686, to do a comparative study of the radius-luminosity (R - L) and X-ray-UV luminosity (L-X - L-UV) relations and the implication of these relations for cosmological parameter estimation. By simultaneously determining R - L or L-X - L-UV relation parameters and cosmological parameters in six different cosmological models, we find that both R - L and L-X - L-UV relations are standardizable but provide only weak cosmological parameter constraints, with L-X - L-UV relation data favouring larger current non-relativistic matter density parameter omega(m0) values than R - L relation data and most other available data. We derive L-X - L-UV and R - L luminosity distances for each of the sources in the six cosmological models and find that L-X - L-UV relation luminosity distances are shorter than R - L relation luminosity distances as well as standard flat ?CDM model luminosity distances. This explains why L-X - L-UV relation QSO data favour larger omega(m0) values than do R - L relation QSO data or most other cosmological measurements. While our sample size is small and only spans a small z range, these results indicate that more work is needed to determine whether the L-X - L-UV relation can be used as a cosmological probe.

Czech name

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Czech description

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Type

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

CEP classification

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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

2023

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

522

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

18

Pages from-to

1247-1264

UT code for WoS article

000991993800075

EID of the result in the Scopus database

2-s2.0-85159708100