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

J 2022

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

KHADKA, Narayan, Mary Loli MARTÍNEZ-ALDAMA, Michal ZAJAČEK, Bożena CZERNY, Bharat RATRA et. al.

Základní údaje

Originální název

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

Autoři

KHADKA, Narayan, Mary Loli MARTÍNEZ-ALDAMA, Michal ZAJAČEK (703 Slovensko, domácí), Bożena CZERNY a Bharat RATRA

Vydání

Monthly Notices of the Royal Astronomical Society, Oxford University Press, 2022, 0035-8711

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 4.800

Kód RIV

RIV/00216224:14310/22:00125896

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1093/mnras/stac914

UT WoS

000791556100004

Klíčová slova anglicky

quasars: emission lines; cosmological parameters; cosmology: observations; dark energy

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 31. 5. 2022 11:43, Mgr. Marie Šípková, DiS.

Anotace

V originále

We use 118 Hβ 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 ∼2σ 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.

Návaznosti

GX21-13491X, projekt VaV

Název: Zkoumání žhavého vesmíru a porozumění kosmické zpětné vazbě (Akronym: EHU)

Investor: Grantová agentura ČR, Exploring the Hot Universe and Understanding Comic Feedback

Citovat

KHADKA, Narayan, Mary Loli MARTÍNEZ-ALDAMA, Michal ZAJAČEK, Bożena CZERNY a Bharat RATRA. Do reverberation-measured Hβ quasars provide a useful test of cosmology? Monthly Notices of the Royal Astronomical Society. Oxford University Press, 2022, roč. 513, č. 2, s. 1985-2005. ISSN 0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stac914.

@article{1856378,
   author = {Khadka, Narayan and MartínezandAldama, Mary Loli and Zajaček, Michal and Czerny, Bożena and Ratra, Bharat},
   article_number = {2},
   doi = {http://dx.doi.org/10.1093/mnras/stac914},
   keywords = {quasars: emission lines; cosmological parameters; cosmology: observations; dark energy},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {Do reverberation-measured Hβ quasars provide a useful test of cosmology?},
   url = {https://academic.oup.com/mnras/article-abstract/513/2/1985/6564712?redirectedFrom=fulltext&login=true},
   volume = {513},
   year = {2022}
}

TY  - JOUR
ID  - 1856378
AU  - Khadka, Narayan - Martínez-Aldama, Mary Loli - Zajaček, Michal - Czerny, Bożena - Ratra, Bharat
PY  - 2022
TI  - Do reverberation-measured Hβ quasars provide a useful test of cosmology?
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 513
IS  - 2
SP  - 1985-2005
EP  - 1985-2005
PB  - Oxford University Press
SN  - 00358711
KW  - quasars: emission lines
KW  - cosmological parameters
KW  - cosmology: observations
KW  - dark energy
UR  - https://academic.oup.com/mnras/article-abstract/513/2/1985/6564712?redirectedFrom=fulltext&login=true
N2  - We use 118 Hβ 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 ∼2σ 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.
ER  -

KHADKA, Narayan, Mary Loli MARTÍNEZ-ALDAMA, Michal ZAJAČEK, Bo$\backslash$.zena CZERNY a Bharat RATRA. Do reverberation-measured Hβ quasars provide a useful test of cosmology? \textit{Monthly Notices of the Royal Astronomical Society}. Oxford University Press, 2022, roč.~513, č.~2, s.~1985-2005. ISSN~0035-8711. Dostupné z: https://dx.doi.org/10.1093/mnras/stac914.

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