Logo image
Back
ASAS-SN light curves of SDSS AGNs
Dataset   Open access

ASAS-SN light curves of SDSS AGNs

H. Yuk, X. Dai, T. Jayasinghe, H. Fu, H.D. Mishra, C.S. Kochanek, B.J. Shappee and K.Z. Stanek
Centre de Donnees Strasbourg (CDS)
2024
DOI: 10.26093/cds/vizier.19300110
url
https://doi.org/10.26093/cds/vizier.19300110View
Open Access

Abstract

Low luminosity active galactic nuclei (LLAGN) probe accretion physics in the low Eddington regime can provide additional clues about galaxy evolution. AGN variability is ubiquitous and thus provides a reliable tool for finding AGN. We analyze the All-Sky Automated Survey for SuperNovae light curves of 1218 galaxies with g<14mag and Sloan Digital Sky Survey spectra in search of AGN. We find 37 objects that are both variable and have AGN-like structure functions, which is about 3% of the sample. The majority of the variability selected AGN are LLAGN with Eddington ratios ranging from 10^-4^ to 10^-2^. We thus estimate the fraction of LLAGN in the population of galaxies as 2% down to a median Eddington ratio of 2x10^-3^. Combining the BPT line ratio AGN diagnostics and the broad-line AGN, up to ~60% of the AGN candidates are confirmed spectroscopically. The BPT diagnostics also classified 10%-30% of the candidates as star-forming galaxies rather than AGN
 Spectroscopy Active galactic nuclei Broad band photometry Optical astronomy Surveys

Details

Metrics

20 Record Views
Logo image