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28 March 2024 |
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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
; 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
; | Date: |
9 Jan 2020 | 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 H$eta$ line responses have been inconsistent, with time
lags of $sim$200 days, $sim$25 days, and $sim$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 $sim$3 days) for two years during 2017--2019 to measure the
kinematics and structure of the ionized gas. We successfully detected time lags
of broad H$eta$, He II, He I, and Fe II lines with respect to the varying
5100AA 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 $0.97_{-0.18}^{+0.15} imes 10^7~M_{odot}$, PG 2130+099 has an
accretion rate of $10^{2.1pm0.5}L_{
m Edd}c^{-2}$, where $L_{
m Edd}$ 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. | Source: | arXiv, 2001.3086 | Services: | Forum | Review | PDF | Favorites |
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