Changing-look active galactic nuclei
Active galactic nuclei (AGNs) are known to show flux variability over all observable
timescales and across the entire electromagnetic spectrum. Over the past decade, a growing …
timescales and across the entire electromagnetic spectrum. Over the past decade, a growing …
The Lick AGN Monitoring Project 2016: velocity-resolved Hβ lags in luminous Seyfert galaxies
We carried out spectroscopic monitoring of 21 low-redshift Seyfert 1 galaxies using the Kast
double spectrograph on the 3 m Shane telescope at Lick Observatory from 2016 April to …
double spectrograph on the 3 m Shane telescope at Lick Observatory from 2016 April to …
Revisiting UV/optical continuum time lags in AGN
In this paper, we present an updated version of our model (KYN** project
designed to trace out the structure of Mrk 817 from the inner accretion disk to the broad …
designed to trace out the structure of Mrk 817 from the inner accretion disk to the broad …
Accretion disk size measurements of active galactic nuclei monitored by the Zwicky Transient Facility
WJ Guo, YR Li, ZX Zhang, LC Ho… - The Astrophysical …, 2022 - iopscience.iop.org
We compile a sample of 92 active galactic nuclei (AGNs) at z< 0.75 with gri photometric light
curves from the archival data of the Zwicky Transient Facility and measure the accretion disk …
curves from the archival data of the Zwicky Transient Facility and measure the accretion disk …
Accretion disc sizes from continuum reverberation map** of AGN selected from the ZTF survey
We present the accretion disc-size estimates for a sample of 19 active galactic nuclei (AGNs)
using the optical g-, r-, and i-band light curves obtained from the Zwicky Transient Facility …
using the optical g-, r-, and i-band light curves obtained from the Zwicky Transient Facility …
Scientific objectives of the Hot Universe Baryon Surveyor (HUBS) mission
Abstract The Hot Universe Baryon Surveyor (HUBS) is a proposed space-based X-ray
telescope for detecting X-ray emissions from the hot gas content in our universe. With its …
telescope for detecting X-ray emissions from the hot gas content in our universe. With its …
Changing-look event in NGC 3516: continuum or obscuration variability?
M Mehdipour, GA Kriss, LW Brenneman… - The Astrophysical …, 2022 - iopscience.iop.org
The Seyfert-1 galaxy NGC 3516 has undergone major spectral changes in recent years. In
2017 we obtained Chandra, NuSTAR, and Swift observations during its new low-flux state …
2017 we obtained Chandra, NuSTAR, and Swift observations during its new low-flux state …
UV–optical disk reverberation lags despite a faint X-ray corona in the active galactic nucleus Mrk 335
We present the first results from a 100-day Swift, NICER, and ground-based X-ray–UV–
optical reverberation map** campaign of the Narrow-line Seyfert 1 Mrk 335, when it was …
optical reverberation map** campaign of the Narrow-line Seyfert 1 Mrk 335, when it was …
Estimating black hole spin from AGN SED fitting: the impact of general-relativistic ray tracing
S Hagen, C Done - Monthly Notices of the Royal Astronomical …, 2023 - academic.oup.com
Accretion disc model fitting to optical/UV quasar spectra requires that the highest mass black
holes have the highest spin, with implications on the hierarchical growth of supermassive …
holes have the highest spin, with implications on the hierarchical growth of supermassive …