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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F22%3A00129255" target="_blank" >RIV/00216224:14310/22:00129255 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1093/mnras/stac1940" target="_blank" >https://doi.org/10.1093/mnras/stac1940</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stac1940" target="_blank" >10.1093/mnras/stac1940</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GX21-13491X" target="_blank" >GX21-13491X: Zkoumání žhavého vesmíru a porozumění kosmické zpětné vazbě</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

515

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

20

Strana od-do

3729-3748

Kód UT WoS článku

000838819900011

EID výsledku v databázi Scopus

2-s2.0-85136300020