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Panic at the ISCO: time-varying double-peaked broad lines from evolving accretion disks are common amongst optically variable AGN
Charlotte Ward, Suvi Gezari, Peter Nugent +12
About 3-10\% of Type I active galactic nuclei (AGN) have double-peaked broad Balmer lines in their optical spectra originating from the motion of gas in their accretion disk. Doubl…
Outlier Detection in the DESI Bright Galaxy Survey
Yan Liang, Peter Melchior, ChangHoon Hahn +3
We present an unsupervised search for outliers in the Bright Galaxy Survey (BGS) dataset from the DESI Early Data Release. This analysis utilizes an autoencoder to compress galaxy…
Integral Field Spectroscopy of 13 Tidal Disruption Event Hosts from the ZTF Survey
Erica Hammerstein, S. Bradley Cenko, Suvi Gezari +6
The host galaxies of tidal disruption events (TDEs) have been shown to possess peculiar properties, including high central light concentrations, unusual star-formation histories, a…
Autoencoding Galaxy Spectra II: Redshift Invariance and Outlier Detection
Yan Liang, Peter Melchior, Sicong Lu +2
We present an unsupervised outlier detection method for galaxy spectra based on the spectrum autoencoder architecture spender, which reliably captures spectral features and provide…