| KHADKA, Narayan, Michal ZAJAČEK, Swayamtrupta PANDA, Mary Loli MARTÍNEZ-ALDAMA a Bharat RATRA. 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. Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2022, roč. 515, č. 3, s. 3729-3748. ISSN 0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stac1940. |
Další formáty:
BibTeX
LaTeX
RIS
@article{2239838,
author = {Khadka, Narayan and Zajaček, Michal and Panda, Swayamtrupta and MartínezandAldama, Mary Loli and Ratra, Bharat},
article_number = {3},
doi = {http://dx.doi.org/10.1093/mnras/stac1940},
keywords = {quasars: emission lines; cosmological parameters; dark energy; cosmology: observations},
language = {eng},
issn = {0035-8711},
journal = {Monthly Notices of the Royal Astronomical Society},
title = {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},
url = {https://doi.org/10.1093/mnras/stac1940},
volume = {515},
year = {2022}
}
TY - JOUR
ID - 2239838
AU - Khadka, Narayan - Zajaček, Michal - Panda, Swayamtrupta - Martínez-Aldama, Mary Loli - Ratra, Bharat
PY - 2022
TI - 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
JF - Monthly Notices of the Royal Astronomical Society
VL - 515
IS - 3
SP - 3729-3748
EP - 3729-3748
PB - Oxford University Press
SN - 00358711
KW - quasars: emission lines
KW - cosmological parameters
KW - dark energy
KW - cosmology: observations
UR - https://doi.org/10.1093/mnras/stac1940
N2 - 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.
ER -
KHADKA, Narayan, Michal ZAJAČEK, Swayamtrupta PANDA, Mary Loli MARTÍNEZ-ALDAMA a Bharat RATRA. 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. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford University Press, 2022, roč.~515, č.~3, s.~3729-3748. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stac1940.
|
