Standardizing reverberation-mapped Hα and Hβ active galactic
nuclei using radius-luminosity relations involving
monochromatic and broad Hα luminosities

J 2025

Standardizing reverberation-mapped Hα and Hβ active galactic nuclei using radius-luminosity relations involving monochromatic and broad Hα luminosities

CAO, Shulei; Amit Kumar MANDAL; Michal ZAJAČEK; Bozena CZERNY; Bharat RATRA et al.

Základní údaje

Originální název

Standardizing reverberation-mapped Hα and Hβ active galactic nuclei using radius-luminosity relations involving monochromatic and broad Hα luminosities

Autoři

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

Vydání

Physical review D, Maryland, 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, URL

Impakt faktor

Impact factor: 5.300 v roce 2024

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/25:00144323

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

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

Štítky

14312040, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 19. 5. 2025 13:11, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

We test the standardizability of a homogeneous sample of 41 lower-redshift (0.00415 <= z <= 0.474) active galactic nuclei (AGNs) reverberation-mapped (RM) using the broad Ha and H/3 emission lines. We find that these sources can be standardized using four radius-luminosity (R - L) relations incorporating Ha and H/3 time delays and monochromatic and broad Ha luminosities. Although the R - L relation parameters are well-constrained and independent of the six cosmological models considered, the resulting cosmological constraints are weak. The measured R - L relations exhibit slightly steeper slopes than predicted by a simple photoionization model and steeper than those from previous higher-redshift H/3 analyses based on larger datasets. These differences likely reflect the absence of high-accreting sources in our smaller, lower-redshift sample, which primarily comprises lower-accreting AGNs. The inferred cosmological parameters are consistent within 26 (or better) with those from better-established cosmological probes. This contrasts with our earlier findings using a larger, heterogeneous sample of 118 H/3 AGNs, which yielded cosmological constraints differing by greater than or similar to 26 from better-established cosmological probes. Our analysis demonstrates that sample homogeneity-specifically, the use of a consistent time-lag determination method-is crucial for developing RM AGNs as a cosmological probe.

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)

GM24-10599M, projekt VaV

Název: Hvězdy v galaktických jádrech: vzájemný vztah s masivními černými dírami

Investor: Grantová agentura ČR, Hvězdy v galaktických jádrech: vzájemný vztah s masivními černými dírami

Citovat

CAO, Shulei; Amit Kumar MANDAL; Michal ZAJAČEK; Bozena CZERNY a Bharat RATRA. Standardizing reverberation-mapped Hα and Hβ active galactic nuclei using radius-luminosity relations involving monochromatic and broad Hα luminosities. Physical review D. Maryland: American Physical Society, 2025, roč. 111, č. 8, s. 1-34. ISSN 2470-0010. Dostupné z: https://doi.org/10.1103/PhysRevD.111.083545.

@article{2497581,
   author = {Cao, Shulei and Mandal, Amit Kumar and Zajaček, Michal and Czerny, Bozena and Ratra, Bharat},
   article_location = {Maryland},
   article_number = {8},
   doi = {https://doi.org/10.1103/PhysRevD.111.083545},
   keywords = {Cosmological parameters; Cosmology; Dark energy; Galactic nuclei and quasars},
   language = {eng},
   issn = {2470-0010},
   journal = {Physical review D},
   title = {Standardizing reverberation-mapped Hα and Hβ active galactic nuclei using radius-luminosity relations involving monochromatic and broad Hα luminosities},
   url = {https://ui.adsabs.harvard.edu/abs/2025PhRvD.111h3545C/abstract},
   volume = {111},
   year = {2025}
}

TY  - JOUR
ID  - 2497581
AU  - Cao, Shulei - Mandal, Amit Kumar - Zajaček, Michal - Czerny, Bozena - Ratra, Bharat
PY  - 2025
TI  - Standardizing reverberation-mapped Hα and Hβ active galactic nuclei using radius-luminosity relations involving monochromatic and broad Hα luminosities
JF  - Physical review D
VL  - 111
IS  - 8
SP  - 1-34
EP  - 1-34
PB  - American Physical Society
SN  - 24700010
KW  - Cosmological parameters
KW  - Cosmology
KW  - Dark energy
KW  - Galactic nuclei and quasars
UR  - https://ui.adsabs.harvard.edu/abs/2025PhRvD.111h3545C/abstract
N2  - We test the standardizability of a homogeneous sample of 41 lower-redshift (0.00415 <= z <= 0.474) active galactic nuclei (AGNs) reverberation-mapped (RM) using the broad Ha and H/3 emission lines. We find that these sources can be standardized using four radius-luminosity (R - L) relations incorporating Ha and H/3 time delays and monochromatic and broad Ha luminosities. Although the R - L relation parameters are well-constrained and independent of the six cosmological models considered, the resulting cosmological constraints are weak. The measured R - L relations exhibit slightly steeper slopes than predicted by a simple photoionization model and steeper than those from previous higher-redshift H/3 analyses based on larger datasets. These differences likely reflect the absence of high-accreting sources in our smaller, lower-redshift sample, which primarily comprises lower-accreting AGNs. The inferred cosmological parameters are consistent within 26 (or better) with those from better-established cosmological probes. This contrasts with our earlier findings using a larger, heterogeneous sample of 118 H/3 AGNs, which yielded cosmological constraints differing by greater than or similar to 26 from better-established cosmological probes. Our analysis demonstrates that sample homogeneity-specifically, the use of a consistent time-lag determination method-is crucial for developing RM AGNs as a cosmological probe.
ER  -

CAO, Shulei; Amit Kumar MANDAL; Michal ZAJAČEK; Bozena CZERNY a Bharat RATRA. Standardizing reverberation-mapped Hα and Hβ active galactic nuclei using radius-luminosity relations involving monochromatic and broad Hα luminosities. \textit{Physical review D}. Maryland: American Physical Society, 2025, roč.~111, č.~8, s.~1-34. ISSN~2470-0010. Dostupné z: https://doi.org/10.1103/PhysRevD.111.083545.

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