Time Delay of Mg II Emission Response for the Luminous Quasar HE 0435-4312: toward Application of the High-accretor Radius-Luminosity Relation in Cosmology

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00550197" target="_blank" >RIV/67985815:_____/21:00550197 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3847/1538-4357/abe9b2" target="_blank" >https://doi.org/10.3847/1538-4357/abe9b2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/abe9b2" target="_blank" >10.3847/1538-4357/abe9b2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Time Delay of Mg II Emission Response for the Luminous Quasar HE 0435-4312: toward Application of the High-accretor Radius-Luminosity Relation in Cosmology

Popis výsledku v původním jazyce

Using six years of spectroscopic monitoring of the luminous quasar HE 0435-4312 (z = 1.2231) with the Southern African Large Telescope, in combination with photometric data (CATALINA, OGLE, SALTICAM, and BMT), we determined a rest-frame time delay of 296(14)(+13) days between the Mg II broad-line emission and the ionizing continuum using seven different time-delay inference methods. Time-delay artifact peaks and aliases were mitigated using the bootstrap method and prior weighting probability function, as well as by analyzing unevenly sampled mock light curves. The Mg II emission is considerably variable with a fractional variability of similar to 5.4%, which is comparable to the continuum variability (similar to 4.8%). Because of its high luminosity (L-3000 = 10(46.4) erg s(-1)), the source is beneficial for a further reduction of the scatter along the Mg II-based radius-luminosity relation and its extended versions, especially when the highly accreting subsample that has an rms scatter of similar to 0.2 dex is considered. This opens up the possibility of using the high-accretor Mg II-based radius-luminosity relation for constraining cosmological parameters. With the current sample of 27 reverberation-mapped sources, the best-fit cosmological parameters (Omega(m), Omega(Lambda)) = (0.19, 0.62) are consistent with the standard cosmological model within the 1 sigma confidence level.

Název v anglickém jazyce

Time Delay of Mg II Emission Response for the Luminous Quasar HE 0435-4312: toward Application of the High-accretor Radius-Luminosity Relation in Cosmology

Popis výsledku anglicky

Using six years of spectroscopic monitoring of the luminous quasar HE 0435-4312 (z = 1.2231) with the Southern African Large Telescope, in combination with photometric data (CATALINA, OGLE, SALTICAM, and BMT), we determined a rest-frame time delay of 296(14)(+13) days between the Mg II broad-line emission and the ionizing continuum using seven different time-delay inference methods. Time-delay artifact peaks and aliases were mitigated using the bootstrap method and prior weighting probability function, as well as by analyzing unevenly sampled mock light curves. The Mg II emission is considerably variable with a fractional variability of similar to 5.4%, which is comparable to the continuum variability (similar to 4.8%). Because of its high luminosity (L-3000 = 10(46.4) erg s(-1)), the source is beneficial for a further reduction of the scatter along the Mg II-based radius-luminosity relation and its extended versions, especially when the highly accreting subsample that has an rms scatter of similar to 0.2 dex is considered. This opens up the possibility of using the high-accretor Mg II-based radius-luminosity relation for constraining cosmological parameters. With the current sample of 27 reverberation-mapped sources, the best-fit cosmological parameters (Omega(m), Omega(Lambda)) = (0.19, 0.62) are consistent with the standard cosmological model within the 1 sigma confidence level.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Svazek periodika

912

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

25

Strana od-do

10

Kód UT WoS článku

000646369500001

EID výsledku v databázi Scopus

2-s2.0-85105566393