2020: The Year of Twenty Thousand Transients

Speaker: 
Griffin Hosseinzadeh (CfA)
Date: 
Friday, January 8, 2021 - 2:00pm to 3:00pm

Last year, for the first time, the IAU Transient Name Server surpassed 20,000 astronomical transient reports. This presents both an enormous opportunity, in that previously “rare” classes of transients are now discovered routinely, but also a wake-up call that traditional techniques of classification and analysis are not cut out for the job. In this seminar, I will describe the landscape of transient astronomy in the coming decade: the aspects of stellar physics we can constrain using large samples of stellar explosions, as well as the data science methods our field must adopt in order to take full advantage of our observations. For example, initial samples of tens of core-collapse supernovae have provided surprising clues about pre-explosion eruptions in massive stars; orders-of-magnitude larger samples from the upcoming Legacy Survey of Space and Time will determine how commonly supernovae interact with circumstellar material from these eruptions. Likewise, Advanced LIGO and Virgo enabled the first direct observation of r-process nucleosynthesis in a binary neutron star merger; upgraded four- and five-detector networks will allow us to understand the diversity of these merger events. In both cases, modern cyberinfrastructure (e.g., real-time discovery alerts, robotic follow-up observations, robust image subtraction, machine-learning classification) will be key to maximizing the science return from these powerful discovery engines.

Join Zoom Meeting https://carnegiescience.zoom.us/j/91775440056

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