Data: 14.09.2023

Palestrante: Dr. Or Graur (University of Portsmouth)

Link: https://youtube.com/live/fNOqyPuKMKk

Resumo: The Sloan Digital Sky Survey (SDSS) and other large-scale spectroscopic galaxy surveys collect hundreds of thousands of galaxy spectra. The collaborations behind these survey use their data mostly for cosmology and galaxy studies. In my talk, I will show how the same data can be used as transient surveys. Every now and again, a transient event, such as a supernova, will happen to go off in the center of the galaxy targeted for spectroscopy. Although this happens rarely (1 in 100,000 spectra), when the galaxy samples are large enough (in the millions), one can assemble transient samples large enough for cutting-edge science. I will show how my group has used both SDSS and the currently-active Dark Energy Spectroscopic Instrument (DESI) survey to study both supernovae and tidal disruption events.