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

J 2023

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

KHADKA, Narayan, Michal ZAJAČEK, Raj PRINCE, Swayamtrupta PANDA, Bozena CZERNY et. al.

Basic information

Original name

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

Authors

KHADKA, Narayan (guarantor), Michal ZAJAČEK (703 Slovakia, belonging to the institution), Raj PRINCE, Swayamtrupta PANDA, Bozena CZERNY, Mary Loli MARTÍNEZ-ALDAMA, Vikram Kumar JAISWAL and Bharat RATRA

Edition

Monthly Notices of the Royal Astronomical Society, Oxford University Press, 2023, 0035-8711

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL URL

Impact factor

Impact factor: 4.800 in 2022

RIV identification code

RIV/00216224:14310/23:00134165

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1093/mnras/stad1040

UT WoS

000991993800075

Keywords in English

quasars: emission lines; cosmological parameters; dark energy; cosmology: observations

Abstract

V originále

We use measurements of 59/58 quasars (QSOs), over a redshift range 0.0041 <= z <= 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.

Links

GX21-13491X, research and development project

Name: Zkoumání žhavého vesmíru a porozumění kosmické zpětné vazbě (Acronym: EHU)

Investor: Czech Science Foundation

Citovat

KHADKA, Narayan, Michal ZAJAČEK, Raj PRINCE, Swayamtrupta PANDA, Bozena CZERNY, Mary Loli MARTÍNEZ-ALDAMA, Vikram Kumar JAISWAL and Bharat RATRA. Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius–luminosity relation luminosity distances. Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2023, vol. 522, No 1, p. 1247-1264. ISSN 0035-8711. Available from: https://dx.doi.org/10.1093/mnras/stad1040.

@article{2297222,
   author = {Khadka, Narayan and Zajaček, Michal and Prince, Raj and Panda, Swayamtrupta and Czerny, Bozena and MartínezandAldama, Mary Loli and Jaiswal, Vikram Kumar and Ratra, Bharat},
   article_number = {1},
   doi = {http://dx.doi.org/10.1093/mnras/stad1040},
   keywords = {quasars: emission lines; cosmological parameters; dark energy; cosmology: observations},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius–luminosity relation luminosity distances},
   url = {https://arxiv.org/pdf/2212.10483.pdf},
   volume = {522},
   year = {2023}
}

TY  - JOUR
ID  - 2297222
AU  - Khadka, Narayan - Zajaček, Michal - Prince, Raj - Panda, Swayamtrupta - Czerny, Bozena - Martínez-Aldama, Mary Loli - Jaiswal, Vikram Kumar - Ratra, Bharat
PY  - 2023
TI  - Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius–luminosity relation luminosity distances
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 522
IS  - 1
SP  - 1247-1264
EP  - 1247-1264
PB  - Oxford University Press
SN  - 00358711
KW  - quasars: emission lines
KW  - cosmological parameters
KW  - dark energy
KW  - cosmology: observations
UR  - https://arxiv.org/pdf/2212.10483.pdf
N2  - We use measurements of 59/58 quasars (QSOs), over a redshift range 0.0041 <= z <= 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.
ER  -

KHADKA, Narayan, Michal ZAJAČEK, Raj PRINCE, Swayamtrupta PANDA, Bozena CZERNY, Mary Loli MARTÍNEZ-ALDAMA, Vikram Kumar JAISWAL and Bharat RATRA. Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius–luminosity relation luminosity distances. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford University Press, 2023, vol.~522, No~1, p.~1247-1264. ISSN~0035-8711. Available from: https://dx.doi.org/10.1093/mnras/stad1040.

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