Variable AGN in the GALEX Time Domain Survey

Autor:	Wasleske, Erik J., Baldassare, Vivienne F., Carroll, Christopher M.
Rok vydání:	2022
Předmět:	Astrophysics - Astrophysics of Galaxies Astrophysics - High Energy Astrophysical Phenomena
Druh dokumentu:	Working Paper
DOI:	10.3847/1538-4357/ac715b
Popis:	We searched the Northern Hemisphere Fields of the GALEX Time-Domain Survey (TDS) for galaxies with UV variability indicative of active galactic nuclei (AGNs). We identified 48 high-probability candidate AGNs from a parent sample of 1819 galaxies in the NASA Sloan Atlas (NSA) catalog. We further characterized these systems using optical spectroscopic diagnostics, WISE IR color selection criteria, and spectral energy distribution (SED) modeling. Of the 48 candidates, eight were identified as AGNs from optical emission lines, two were identified by their IR colors, and 28 were identified through spectral energy decomposition. Observational biases of each selection method are discussed in connecting these AGNs subsamples to another. By selecting AGNs based on UV variability, we also identified six low-mass AGNs candidates, all of which would have been missed by spectroscopic selection. Comment: Resubmitted to The Astrophysical Journal
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2205.00547 Zobrazit plný text záznamu View this record from Arxiv