TY - JOUR
T1 - Broad-line Region of the Quasar PG 2130+099 from a Two-year Reverberation Mapping Campaign with High Cadence
AU - Hu, Chen
AU - Li, Yan Rong
AU - Du, Pu
AU - Zhang, Zhi Xiang
AU - Li, Sha Sha
AU - Huang, Ying Ke
AU - Huang, Ying Ke
AU - Lu, Kai Xing
AU - Bai, Jin Ming
AU - Ho, Luis C.
AU - Bian, Wei Hao
AU - Brotherton, Michael S.
AU - Yuan, Ye Fei
AU - Aceituno, Jesús
AU - Winkler, Hartmut
AU - Wang, Jian Min
N1 - Publisher Copyright:
© 2020. The American Astronomical Society. All rights reserved.
PY - 2020/2/10
Y1 - 2020/2/10
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85081655496&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/ab6a17
DO - 10.3847/1538-4357/ab6a17
M3 - Article
AN - SCOPUS:85081655496
SN - 0004-637X
VL - 890
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 71
ER -