Bharat Ratra

activity

20232026

most citedUsing non-DESI data to confirm and strengthen the DESI 2024 spatially-flat

w_{0} w_{a}

CDM cosmological parameterization result

107 citations · 206 across the 13 of their papers we have counts for

collaborators

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3 papers · 1 filter

astro-ph.GA2025

Standardizing reverberation-mapped H $β$ active galactic nuclei using time-averaged radius $-$ luminosity relations with 5100\,Å\,, broad H $β$ , and narrow \OIII\ luminosities

Shulei Cao, Amit Kumar Mandal, Michal Zajaček +1

Active galactic nuclei (AGN) have been studied as alternate probes in cosmology due to their large and stable luminosities and broad redshift range. Previously it was shown that hi…

astro-ph.GA2025

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

Shulei Cao, Amit Kumar Mandal, Michal Zajaček +1

We present a high-quality, homogeneous sample of 157 H $β$ reverberation-mapped active galactic nuclei (RM AGNs) spanning redshifts $0.00308 \leq z \leq 0.8429$ , which is approximat…

astro-ph.GA2024

Standardizing reverberation-mapped H $α$ and H $β$ active galactic nuclei using radius--luminosity relations involving monochromatic and broad H $α$ luminosities

Shulei Cao, Amit Kumar Mandal, Michal Zajaček +2

We test the standardizability of a homogeneous sample of 41 lower-redshift ( $0.00415 \leq z \leq 0.474$ ) active galactic nuclei (AGNs) reverberation-mapped (RM) using the broad H $α$ …

Standardizing reverberation-mapped Hβ active galactic nuclei using time-averaged radius−luminosity relations with 5100\,Å\,, broad Hβ, and narrow \OIII\ luminosities

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

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

Standardizing reverberation-mapped H $β$ active galactic nuclei using time-averaged radius $-$ luminosity relations with 5100\,Å\,, broad H $β$ , and narrow \OIII\ luminosities

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

Standardizing reverberation-mapped H $α$ and H $β$ active galactic nuclei using radius--luminosity relations involving monochromatic and broad H $α$ luminosities