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Spectroscopic r-Process Abundance Retrieval for Kilonovae II: Lanthanides in the Inferred Abundance Patterns of Multi-Component Ejecta from the GW170817 Kilonova
Nicholas Vieira, John J. Ruan, Daryl Haggard +3
In kilonovae, freshly-synthesized -process elements imprint features on optical spectra, as observed in AT2017gfo, the counterpart to the GW170817 binary neutron star merger. Ho…
KilonovAE: Exploring Kilonova Spectral Features with Autoencoders
N. M. Ford, Nicholas Vieira, John J. Ruan +1
Kilonovae are likely a key site of heavy r-process element production in the Universe, and their optical/infrared spectra contain insights into both the properties of the ejecta an…
Signatures of Massive Black Hole Merger Host Galaxies from Cosmological Simulations I: Unique Galaxy Morphologies in Imaging
Jaeden Bardati, John J. Ruan, Daryl Haggard +1
Low-frequency gravitational wave experiments such as the Laser Interferometer Space Antenna and pulsar timing arrays are expected to detect individual massive black hole (MBH) bina…
Probing the Origin of Changing-look Quasar Transitions with Chandra
Qian Yang, Paul J. Green, Chelsea L. MacLeod +9
Extremely variable quasars can also show strong changes in broad-line emission strength and are known as changing-look quasars (CLQs). To study the CLQ transition mechanism, we pre…
Debiasing Standard Siren Inference of the Hubble Constant with Marginal Neural Ratio Estimation
Samuel Gagnon-Hartman, John Ruan, Daryl Haggard
Gravitational wave (GW) standard sirens may resolve the Hubble tension, provided that standard siren inference of is free from systematic biases. However, standard sirens fro…