Standardizing a larger, higher-quality, homogeneous sample of
reverberation-mapped Hβ active galactic nuclei using the
broad-line region radius-luminosity relation

J 2025

Standardizing a larger, higher-quality, homogeneous sample of reverberation-mapped Hβ active galactic nuclei using the broad-line region radius-luminosity relation

CAO, Shulei; Amit Kumar MANDAL; Michal ZAJAČEK a Bharat RATRA

Základní údaje

Originální název

Standardizing a larger, higher-quality, homogeneous sample of reverberation-mapped Hβ active galactic nuclei using the broad-line region radius-luminosity relation

Autoři

CAO, Shulei; Amit Kumar MANDAL; Michal ZAJAČEK a Bharat RATRA

Vydání

Physical review D, American Physical Society, 2025, 2470-0010

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.300 v roce 2024

Označené pro přenos do RIV

Ano

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

Cosmological parameters; Cosmology; Dark energy; Galactic nuclei and quasars

Štítky

14312040, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 28. 1. 2026 11:41, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

We present a high-quality, homogeneous sample of 157 H⁡𝛽 reverberation-mapped active galactic nuclei (AGNs) spanning redshifts 0.00308 ≤𝑧 ≤0.8429, which is approximately 3.8 times larger than the previously available high-quality homogeneous sample. Using the broad-line region radius-luminosity relation (𝑅 −𝐿), which involves the broad H⁡𝛽 line time delay and the monochromatic luminosity at 5100 Å, we show that the sample is standardizable by using six spatially flat and nonflat cosmological models. The inferred cosmological model parameters are consistent within 2⁢𝜎 uncertainties with those from better established baryon acoustic oscillation and Hubble parameter measurements, with the exception of two nonflat models that are ruled out by other data. The 𝑅 −𝐿 relation slope is found to be flatter (𝛾 =0.428 ±0.025 in the flat Λ⁢CDM model) than the slope of 0.5 expected from a simple photoionization model as well as the slope found previously for the smaller homogeneous sample. In addition, we find a mild dependence of H⁡𝛽 𝑅 −𝐿 relation parameters as well as its intrinsic scatter on the Eddington ratio by comparing the 𝑅 −𝐿 relations for low- and high-accreting equal-sized subsamples. A future analysis of a larger homogeneous sample containing a broader range of luminosities and Eddington ratios is necessary to confirm the standardizability of H⁡𝛽 AGNs.

Návaznosti

GF23-04053L, projekt VaV

Název: Role mraků při využití zpoždění kontinua v aktivních galaxiích k měření rychlosti rozpínání vesmíru

Investor: Grantová agentura ČR, Weather effects in using disk continuum time delays in active galactic nuclei to measure the expansion rate of the Universe / Role mraků při využití zpoždění kontinua v aktivních galaxiích k měření rychlosti rozpínání vesmíru, Partnerská agentura (Polsko)

Citovat

CAO, Shulei; Amit Kumar MANDAL; Michal ZAJAČEK a Bharat RATRA. Standardizing a larger, higher-quality, homogeneous sample of reverberation-mapped Hβ active galactic nuclei using the broad-line region radius-luminosity relation. Physical review D. American Physical Society, 2025, roč. 112, č. 4, s. 1-22. ISSN 2470-0010. Dostupné z: https://doi.org/10.1103/w1qx-4v84.

@article{2516657,
   author = {Cao, Shulei and Mandal, Amit Kumar and Zajaček, Michal and Ratra, Bharat},
   article_number = {4},
   doi = {https://doi.org/10.1103/w1qx-4v84},
   keywords = {Cosmological parameters; Cosmology; Dark energy; Galactic nuclei and quasars},
   language = {eng},
   issn = {2470-0010},
   journal = {Physical review D},
   title = {Standardizing a larger, higher-quality, homogeneous sample of reverberation-mapped Hβ active galactic nuclei using the broad-line region radius-luminosity relation},
   url = {https://journals.aps.org/prd/abstract/10.1103/w1qx-4v84},
   volume = {112},
   year = {2025}
}

TY  - JOUR
ID  - 2516657
AU  - Cao, Shulei - Mandal, Amit Kumar - Zajaček, Michal - Ratra, Bharat
PY  - 2025
TI  - Standardizing a larger, higher-quality, homogeneous sample of reverberation-mapped Hβ active galactic nuclei using the broad-line region radius-luminosity relation
JF  - Physical review D
VL  - 112
IS  - 4
SP  - 1-22
EP  - 1-22
PB  - American Physical Society
SN  - 24700010
KW  - Cosmological parameters
KW  - Cosmology
KW  - Dark energy
KW  - Galactic nuclei and quasars
UR  - https://journals.aps.org/prd/abstract/10.1103/w1qx-4v84
N2  - We present a high-quality, homogeneous sample of 157 H⁡𝛽 reverberation-mapped active galactic nuclei (AGNs) spanning redshifts 0.00308 ≤𝑧 ≤0.8429, which is approximately 3.8 times larger than the previously available high-quality homogeneous sample. Using the broad-line region radius-luminosity relation (𝑅 −𝐿), which involves the broad H⁡𝛽 line time delay and the monochromatic luminosity at 5100 Å, we show that the sample is standardizable by using six spatially flat and nonflat cosmological models. The inferred cosmological model parameters are consistent within 2⁢𝜎 uncertainties with those from better established baryon acoustic oscillation and Hubble parameter measurements, with the exception of two nonflat models that are ruled out by other data. The 𝑅 −𝐿 relation slope is found to be flatter (𝛾 =0.428 ±0.025 in the flat Λ⁢CDM model) than the slope of 0.5 expected from a simple photoionization model as well as the slope found previously for the smaller homogeneous sample. In addition, we find a mild dependence of H⁡𝛽 𝑅 −𝐿 relation parameters as well as its intrinsic scatter on the Eddington ratio by comparing the 𝑅 −𝐿 relations for low- and high-accreting equal-sized subsamples. A future analysis of a larger homogeneous sample containing a broader range of luminosities and Eddington ratios is necessary to confirm the standardizability of H⁡𝛽 AGNs.
ER  -

CAO, Shulei; Amit Kumar MANDAL; Michal ZAJAČEK a Bharat RATRA. Standardizing a larger, higher-quality, homogeneous sample of reverberation-mapped Hβ active galactic nuclei using the broad-line region radius-luminosity relation. \textit{Physical review D}. American Physical Society, 2025, roč.~112, č.~4, s.~1-22. ISSN~2470-0010. Dostupné z: https://doi.org/10.1103/w1qx-4v84.

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