| KHADKA, Narayan, Michal ZAJAČEK, Raj PRINCE, Swayamtrupta PANDA, Bozena CZERNY, Mary Loli MARTÍNEZ-ALDAMA, Vikram Kumar JAISWAL a 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, roč. 522, č. 1, s. 1247-1264. ISSN 0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stad1040. |
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@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 a 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, roč.~522, č.~1, s.~1247-1264. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stad1040.
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