26 citations · 56 across the 14 of their papers we have counts for
15 papers
The Changing-look Phenomenon Accompanied by an Accretion Mode Transition in NGC 3786
Suyeon Son, Minjin Kim, Luis C. Ho +2
To reveal the physical origin of the changing-look (CL) phenomenon in NGC 3786, which transitioned from type 1.8/1.9 to type 1, we present an analysis of long-term spectral monitor…
A Catalog of Mid-infrared Variable Sources in the Ecliptic Poles
Minjin Kim, Suyeon Son, Shinyu Kim +4
We construct a catalog of mid-infrared (MIR) variable sources using the multi-epoch 3.6 (W1) and 4.5 m (W2) dataset from the Near-Earth Object Wide-field Infrared Survey Explore…
Mid-infrared Variability-based AGN Selection using the Multi-epoch Photometric Data from WISE
Shinyu Kim, Minjin Kim, Suyeon Son +1
We assess the systematics and efficiency of an AGN selection method based on mid-infrared (MIR) variability. To this end, we utilize various types of active and inactive galaxies f…
Asymmetric torus variability in active galactic nuclei driven by global brightening and dimming
Suyeon Son, Minjin Kim, Luis C. Ho
Temporal asymmetry in the flux variability of active galactic nuclei (AGNs) offers key insights into the physical mechanisms driving AGN variability. In this study, we investigated…
Continuum variability in multi-epoch quasar spectra from the Sloan Digital Sky Survey
Minjin Kim, Suyeon Son, Luis C. Ho
We examine the continuum variability of active galactic nuclei (AGNs) by analyzing the multi-epoch spectroscopic data from the Sloan Digital Sky Survey. To achieve this, we utilize…
Probing the Physical Origin of the Balmer Decrement in the Broad-line Region of Nearby Active Galactic Nuclei via Spectral Variability
Suyeon Son, Minjin Kim, Luis C. Ho +1
To investigate the physical origin of the Balmer decrement in the broad-line region of active galactic nuclei (AGNs), we measure the temporal variability of the fluxes of the broad…
Temperature Profiles of Accretion Disks in Luminous Active Galactic Nuclei derived from Ultraviolet Spectroscopic Variability
Suyeon Son, Minjin Kim, Luis C. Ho
The characteristic timescale () of continuum variability of the accretion disk in active galactic nuclei (AGNs) is known to be related to the thermal timescale, which is predict…
Accuracy of Stellar Mass-to-light Ratios of Nearby Galaxies in the Near-Infrared
Taehyun Kim, Minjin Kim, Luis C. Ho +12
Future satellite missions are expected to perform all-sky surveys, thus providing the entire sky near-infrared spectral data and consequently opening a new window to investigate th…
The Size-luminosity Relation of the AGN Torus Determined from the Comparison between Optical and Mid-infrared Variability
Minjin Kim, Suyeon Son, Luis C. Ho
We investigate the optical variability of low-redshift () active galactic nuclei using the multi-epoch data from the Zwicky Transient Facility. We find that a dampe…
The Structure Function of Mid-infrared Variability in Low-redshift Active Galactic Nuclei
Suyeon Son, Minjin Kim, Luis C. Ho
Using the multi-epoch mid-infrared (MIR) photometry from the Wide-field Infrared Survey Explorer spanning a baseline of yr, we extensively investigate the MIR variability…
Deficit of Hot Dust in Low-redshift Active Galactic Nuclei
Suyeon Son, Minjin Kim, Luis C. Ho
We assemble a broad-band spectral energy distribution (SED) ranging from optical to mid-infrared of nearby active galactic nuclei at . SED fitting analysis is performed us…
A Mid-infrared Flare in the Seyfert Galaxy NGC 3786: A Changing-look Event Triggered by an Obscured Tidal Disruption Event?
Suyeon Son, Minjin Kim, Luis C. Ho +2
We report an exceptional mid-infrared flare in the Seyfert 1.8 NGC 3786. In the multi-epoch data from the Wide-field Infrared Survey Explorer, the nuclear mid-infrared brightness o…
Relation between Black Hole Mass and Bulge Luminosity in Hard X-ray selected Type 1 AGNs
Suyeon Son, Minjin Kim, Aaron J. Barth +1
Using -band images of 35 nearby () type 1 active galactic nuclei (AGNs) obtained with Hubble Space Telescope, selected from the 70-month Swift-BAT X-ray source catalog, w…
Mid-infrared Variability of Low-redshift Active Galactic Nuclei : Constraints on a Hot Dust Component with a Variable Covering Factor
Suyeon Son, Minjin Kim, Luis C. Ho
We utilize mid-infrared multi-epoch data from Wide-field Infrared Survey Explorer (WISE) over a -year period in W1 (3.4m) and W2 (4.6m) bands to investigate the struc…
A Hubble Space Telescope Imaging Survey of Low-Redshift Swift-BAT Active Galaxies
Minjin Kim, Aaron J. Barth, Luis C. Ho +1
We present initial results from a Hubble Space Telescope snapshot imaging survey of the host galaxies of Swift-BAT active galactic nuclei (AGN) at z<0.1. The hard X-ray selection m…