Institute of Astronomy

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General Seminar

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General Seminar takes place every Monday at 11.15 in Piwnice, radioastronomy seminar room.
Remote participation via the BigBlueButton (BBB).


6 February 2023

“Progenitors of LGRBs: Are single stars enough”

MSc Rafia Sarwar (Institute of Astronomy, Nicolaus Copernicus University)

Abstract:
In recent years theoretical and observational stellar astrophysics strongly altered the paradigm of our current understanding of the life cycle of massive stars, from their birth in the dense interstellar medium to their final fate of collapsing into compact objects. If these compact objects are insufficiently close orbits, they start losing orbital energy via gravitational wave (GW) emission. Stellar evolutionary models are commonly used to infer the event rates of these gravitational waves statistically. Despite their significance, many if not all the evolutionary models of massive stars do not take in the final phase of the stellar explosion. The complexity of the problem is due to the intricate dependence of the explosion physics on the structure of the exploding star. Therefore, it is crucial to develop a new computer routine that associates stellar models with various types of supernovae in accordance with their explosion energies and ejecta mass. Here we present the preliminary results of Yoon et al. (2006), revised and expanded upon, including the new observational comparison for GRBs.