3 papers
astro-ph.IM2026
$\texttt{HostSub_GP}$: Precise Galaxy Background Subtraction in Transient Long-slit Spectroscopy with Gaussian Processes
Chang Liu, Adam A. Miller
We present a novel host galaxy subtraction technique in long-slit spectroscopy for extragalactic transients. Unlike classic methods which generally estimate the background using a…
astro-ph.IM2025
A Morphological Model to Separate Resolved-Unresolved Sources in the DESI Legacy Surveys: Application in the LS4 Alert Stream
Chang Liu, Adam A. Miller, Joshua S. Bloom +2
Separating resolved and unresolved sources in large imaging surveys is a fundamental step to enable downstream science, such as searching for extragalactic transients in wide-field…
astro-ph.HE2024
Repeating Partial Tidal Encounters of Sun-like Stars Leading to their Complete Disruption
Chang Liu, Ricardo Yarza, Enrico Ramirez-Ruiz
Stars grazing supermassive black holes on bound orbits may produce periodic flares over many passages, known as repeating partial tidal disruption events (TDEs). Here, we present 3…