Do reverberation-measured Hβ quasars provide a useful test of cosmology?

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Publikace nespadá pod Filozofickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.
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KHADKA Narayan MARTÍNEZ-ALDAMA Mary Loli ZAJAČEK Michal CZERNY Bożena RATRA Bharat

Rok publikování 2022
Druh Článek v odborném periodiku
Časopis / Zdroj Monthly Notices of the Royal Astronomical Society
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
www https://academic.oup.com/mnras/article-abstract/513/2/1985/6564712?redirectedFrom=fulltext&login=true
Doi http://dx.doi.org/10.1093/mnras/stac914
Klíčová slova quasars: emission lines; cosmological parameters; cosmology: observations; dark energy
Popis We use 118 Hß quasar (QSO) observations in the redshift range 0.0023 ? z ? 0.89 to simultaneously constrain cosmological model parameters and QSO 2-parameter radius-luminosity (R–L) relation parameters in six different cosmological models. We find that the R–L relation parameters for these QSOs are independent of the assumed cosmology so these QSOs seem to be standardizable through the R–L relation (although there is a complication that might render this untrue). Cosmological constraints obtained using these QSOs are weak, more favour currently decelerated cosmological expansion, and typically are in ~2? tension with those obtained from a joint analysis of baryon acoustic oscillation and Hubble parameter measurements. Extending the R–L relation to a 3-parameter one to try to correct for the accretion rate effect does not result in a reduction of the cosmological constraints discrepancy nor does it result in the hoped-for significant reduction of the intrinsic scatter of the R–L relation.
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