J/ApJ/936/75 Spectroscopy and photometry follow up for NGC 4151 (Li+, 2022)
Velocity-resolved Reverberation Mapping of Changing-look Active Galactic Nucleus
NGC 4151 during Outburst Stage: Evidence for Kinematics Evolution of Broad-line
Region.
Li S.-S., Feng H.-C., Liu H.T., Bai J.M., Li R., Lu K.-X., Wang J.-G.,
Huang Y.-K., Zhang Z.-X.
<Astrophys. J., 936, 75 (2022)>
=2022ApJ...936...75L 2022ApJ...936...75L
ADC_Keywords: Active gal. nuclei; Black holes; Galaxies, Seyfert; Spectroscopy;
Photometry, H-alpha; Photometry, H-beta; Photometry, H-gamma
Keywords: Active galactic nuclei ; Seyfert galaxies ; Time domain
astronomy ; Reverberation mapping ; Supermassive black holes
Abstract:
Changing-look active galactic nucleus NGC4151, which has attracted a
lot of attention, is undergoing the second dramatic outburst stage in
its evolutionary history. To investigate the geometry and kinematics
of the broad- line region (BLR), and measure the mass of supermassive
black hole in NGC4151, we perform a 7 month photometric and
spectroscopic monitoring program in 2020-2021, using the 2.4m
telescope at Lijiang Observatory. We successfully measure the time
lags of the responses from broad Hα, Hβ, Hγ, HeI, and
HeII emission lines to continuum variation, which are
7.63-2.62+1.85, 6.21-1.13+1.41, {.67-1.94+1.65,
1.59-1.11+0.86, and 0.46-1.06+1.22days, respectively,
following radial stratification. The ratios of time lags among these
lines are 1.23: 1.00: 0.91: 0.26: 0.07. We find that the continuum lag
between the ultraviolet and optical bands can significantly affect the
lag measurements of HeI and HeII. Virial and infalling gas motions
coexist in this campaign, which is different from previous results,
implying the evolutionary kinematics of BLR. Based on our measurements
and previous ones in the literature, we confirm that the BLR of NGC
4151 is basically virialized. Finally, we compute the black hole mass
through multiple lines, and the measurement from Hβ to be
3.94-0.72+0.90x107M☉, which is consistent with previous
results. The corresponding accretion rate is
0.02-0.01+0.01L{Eddc-2^_, implying a sub-Eddington accretor.
Description:
NGC 4151 was monitored between 2020 November and 2021 June using the
2.4m telescope of Lijiang Observatory, Yunnan Observatories, Chinese
Academy of Sciences.
Objects:
----------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------
12 10 32.57 +39 24 21.0 NGC 4151 = 1E 1208.0+3941
----------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 102 116 Broad Emission-line and Photometric Light Curves
--------------------------------------------------------------------------------
See also:
J/ApJ/613/682 : AGN central masses & broad-line region size (Peterson+, 2004)
J/A+A/486/99 : Long-term spectral variability NGC 4151 (Shapovalova+, 2008)
J/MNRAS/426/416 : Mrk6 Hα, Hβ & Hγ spectra (Doroshenko+, 2012)
J/ApJ/782/45 : SEAMBHs I. Mrk 142, Mrk 335, and IRAS F12397+3333 (Du+, 2014)
J/ApJ/788/159 : 17 Seyfert 1 galaxies light curves (Koshida+, 2014)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/ApJ/793/108 : SEAMBHs. II. Continuum and Hbeta LCs (Wang+, 2014)
J/ApJS/217/26 : Lick AGN monitoring 2011; light curves (Barth+, 2015)
J/ApJ/840/41 : X-ray/UV Swift monitoring of NGC 4151 (Edelson+, 2017)
J/ApJ/840/97 : Opt reverberation mapping campaign 5 AGNs (Fausnaugh+, 2017)
J/ApJ/866/133 : Continuum-Hβ light curves of 5 Seyfert1 (De Rosa+, 2018)
J/ApJ/869/142 : Monitoring AGNs with Hβ Asymmetry (MAHA). I. (Du+, 2018)
J/ApJ/887/135 : V-band, 5100Å and broad emission LCs of Mrk 79 (Lu+, 2019)
J/ApJ/876/49 : 10yr reverberation mapping campaign for 3C273 (Zhang+, 2019)
J/ApJ/905/77 : Monitoring AGNs with Hbeta Asymmetry II. (Brotherton+, 2020)
J/ApJ/896/1 : SEAMBHs. XI. Mrk 142 X-ray to optical lc (Cackett+, 2020)
J/ApJ/905/75 : 3yrs spectroscopic light curves of PG0026+129 (Hu+, 2020)
J/ApJ/890/71 : 5100AA continuum & emission lines LCs PG2130+099 (Hu+, 2020)
J/ApJ/902/26 : HST opt. & H-band obs. of Cepheids in NGC4151 (Yuan+, 2020)
J/ApJ/909/18 : Reverberation mapping monitoring of NGC3516 (Feng+, 2021)
J/ApJ/912/92 : Lijiang/YFOSC light curves of NGC 2617 (Feng+, 2021)
J/ApJS/253/20 : SEAMBHs XII. Reberberation mapping for 15 PG QSOs (Hu+, 2021)
J/ApJ/920/9 : YFOSC light curves of PG 0923+201 and PG 1001+291 (Li+, 2021)
J/ApJ/918/50 : Reverberation mapping for Mrk 817 and NGC 7469 (Lu+, 2021)
J/ApJ/912/126 : B and JHKL light curves of NGC 4151 (Lyu+, 2021)
J/A+A/659/A13 : PG 2130+099 narrowband light curves (Fian+, 2022)
J/ApJ/928/60 : Virial factor of SDSS DR5 QSOs (Liu+, 2022)
J/ApJ/925/52 : LAMP 2016 velocity-resolved Hb lags in Seyfert gal (U+, 2022)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 d JDSpec [9162/9351]? Julian Date spectrum obtained;
JD-2450000
9- 15 F7.3 10-13mW/m2 FHa [147/181]? Hα emission line flux (1)
17- 21 F5.3 10-13mW/m2 e_FHa [1.81/1.84]? Uncertainty in FHa
23- 28 F6.3 10-13mW/m2 FHb [46.2/59.3]? Hβ emission line flux (1)
30- 34 F5.3 10-13mW/m2 e_FHb [0.7/0.8]? Uncertainty in FHb
36- 41 F6.3 10-13mW/m2 FHg [19.2/25.9]? Hγ emission line flux (1)
43- 47 F5.3 10-13mW/m2 e_FHg [0.6/0.7]? Uncertainty in FHg
49- 54 F6.3 10-13mW/m2 FHeI [7.36/11.1]? HeI emission line flux (1)
56- 60 F5.3 10-13mW/m2 e_FHeI [0.2/0.3]? Uncertainty in FHeI
62- 67 F6.3 10-13mW/m2 FHeII [7.81/20.1]? HeII emission line flux (1)
69- 73 F5.3 10-13mW/m2 e_FHeII [1/2]? Uncertainty in FHeII
75- 81 F7.2 d JDPhot [9153/9394] Julian Date photometry obtained;
JD-2450000
83- 88 F6.3 mag mag [12.6/12.97] Apparent magnitude (2)
90- 94 F5.3 mag e_mag [0.01/0.03] Uncertainty in mag
96-102 A7 --- Tel Telescope code for the photometry (3)
--------------------------------------------------------------------------------
Note (1): In units of 1e-13 erg/s/cm2.
Note (2): The photometry includes the B band data of Lijiang and
the g band of ZTF, which are intercalibrated by PyCALI to bring
them into a common scale. Here, they are calibrated to the scale
of B band light curve.
Note (3): Telescopes as follows:
Lijiang = Lijiang 2.4m telescope;
ZTF = Zwicky Transient Facility.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS],Coralie Fix [CDS], 20-Jun-2024