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CCAPP Seminar - Mathieu Renzo (Flatiron Institute)

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March 7, 2023
12:00PM - 1:00PM
Hybrid - PRB4138 and Zoom

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Add to Calendar 2023-03-07 12:00:00 2023-03-07 13:00:00 CCAPP Seminar - Mathieu Renzo (Flatiron Institute) Mathieu Renzo (Flatiron Institute) Explosive connections between massive binaries and stellar transients Stars massive enough to end their life collapsing and/or exploding are typically born in binary or higher multiplicity systems. In most cases, interactions among the companions change the evolution and fate of *both* stars. I will provide a theoretical overview of (i) common, (ii) uncommon, and (iii) extreme phenomena in massive binary evolution, that is "widowed" accretors ejected from binaries, X-ray binaries, and pulsational pair instability supernovae, respectively. I will emphasize the need to combine the statistical power of large populations and the detailed constraint from nearby sources to understand the mutual relation between binary interactions and stellar explosions. Specifically, I will show: (i) how the nearest O-type star to Earth can be used to pin challenging models binary accretors, revealing important structural and evolutionary difference with stars evolving as single. (ii) how Galactic X-ray binaries can be used to construct empirically anchored progenitor evolution scenarios for the most extreme compact object mergers, informing population analysis (iii) how the combination of large time-domain surveys (e.g., Rubin/LSST) with deep followup (e.g., JWST) and gravitational detections are already putting strain on long-standing predictions for these extreme explosions. This demands theoretical advances in particular regarding the impact of binary interactions on the most massive stars. Hybrid - PRB4138 and Zoom Center for Cosmology and AstroParticle Physics (CCAPP) ccapp@osu.edu America/New_York public

Mathieu Renzo (Flatiron Institute)

Explosive connections between massive binaries and stellar transients

Stars massive enough to end their life collapsing and/or exploding are typically born in binary or higher multiplicity systems. In most cases, interactions among the companions change the evolution and fate of *both* stars. I will provide a theoretical overview of (i) common, (ii) uncommon, and (iii) extreme phenomena in massive binary evolution, that is "widowed" accretors ejected from binaries, X-ray binaries, and pulsational pair instability supernovae, respectively. I will emphasize the need to combine the statistical power of large populations and the detailed constraint from nearby sources to understand the mutual relation between binary interactions and stellar explosions. Specifically, I will show:

(i) how the nearest O-type star to Earth can be used to pin challenging models binary accretors, revealing important structural and evolutionary difference with stars evolving as single.

(ii) how Galactic X-ray binaries can be used to construct empirically anchored progenitor evolution scenarios for the most extreme compact object mergers, informing population analysis

(iii) how the combination of large time-domain surveys (e.g., Rubin/LSST) with deep followup (e.g., JWST) and gravitational detections are already putting strain on long-standing predictions for these extreme explosions. This demands theoretical advances in particular regarding the impact of binary interactions on the most massive stars.

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