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Quantifying the Active Galactic Nuclei Fraction in Cosmic Voids via Mid-Infrared Variability
Anish S. Aradhey, Anca Constantin, Michael S. Vogeley +1
Observations and theoretical simulations suggest that the large scale environment plays a significant role in how galaxies form and evolve and, in particular, whether and when gala…
Examining AGN UV/optical Variability Beyond the Simple Damped Random Walk
Weixiang Yu, Gordon T. Richards, Michael S. Vogeley +2
We present damped harmonic oscillator (DHO) light-curve modeling for a sample of 12,714 spectroscopically confirmed quasars in the Sloan Digital Sky Survey Stripe 82 region. DHO is…
Properties of a Previously Unidentified Instrumental Signature in that was Confused for AGN Variability
Jackeline Moreno, Rachel Buttry, John O'Brien +3
The satellite potentially provides the highest precision photometry of active galactic nuclei (AGN) available to investigate short-timescale optical variability.…
Complex Variability of Kepler AGN Revealed by Recurrence Analysis
R. A. Phillipson, P. T. Boyd, A. P. Smale +1
The advent of new time domain surveys and the imminent increase in astronomical data expose the shortcomings in traditional time series analysis (such as power spectra analysis) in…
Influence of the Void Environment on Chemical Abundances in Dwarf Galaxies and Implications for Connecting Star Formation and Halo Mass
Kelly A. Douglass, Michael S. Vogeley, Renyue Cen
We study how the void environment affects galactic chemical evolution by comparing the oxygen and nitrogen abundances of dwarf galaxies in voids with dwarf galaxies in denser regio…
Large-scale environmental dependence of the abundance ratio of nitrogen to oxygen in blue, star-forming galaxies fainter than L*
Kelly A. Douglass, Michael S. Vogeley
We examine how the cosmic environment affects the chemical evolution of galaxies in the Universe by comparing the N/O ratio of dwarf galaxies in voids with dwarf galaxies in more d…