Broad-line Region of the Quasar PG 2130+099 from a Two-year Reverberation Mapping Campaign with High Cadence

Chen Hu, Yan Rong Li, Pu Du, Zhi Xiang Zhang, Sha Sha Li, Ying Ke Huang, Ying Ke Huang, Kai Xing Lu, Jin Ming Bai, Luis C. Ho, Wei Hao Bian, Michael S. Brotherton, Ye Fei Yuan, Jesús Aceituno, Hartmut Winkler, Jian Min Wang

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20 Citations (Scopus)

Abstract

As one of the most interesting Seyfert 1 galaxies, PG 2130+099 has been the target of several reverberation mapping (RM) campaigns over the years. However, its measured broad Hβ line responses have been inconsistent, with time lags of ∼200 days, ∼25 days, and ∼10 days being reported for different epochs while its optical luminosity changed no more than 40%. To investigate this issue, we conducted a new RM-campaign with homogenous and high cadence (about ∼3 days) for two years during 2017-2019 to measure the kinematics and structure of the ionized gas. We successfully detected time lags of broad Hβ, He ii, He i, and Fe ii lines with respect to the varying 5100 Å continuum, revealing a stratified structure that is likely virialized with Keplerian kinematics in the first year of observations, but an inflow kinematics of the broad-line region from the second year. With a central black hole mass of 0.97+0.15 -0.18 × 107 Mo˙, PG 2130+099 has an accretion rate of 102.1 ± 0.5 LEdd c-2, where L Edd is the Eddington luminosity and c is speed of light, implying that it is a super-Eddington accretor and likely possesses a slim, rather than thin, accretion disk. The fast changes of the ionization structures of the three broad lines remain puzzling.

Original languageEnglish
Article number71
JournalAstrophysical Journal
Volume890
Issue number1
DOIs
Publication statusPublished - 10 Feb 2020

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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