Date:
Tue, 06/05/202512:30-13:30
Speaker: Erez Zimmerman (Dept. Particle Physics & Astrophysics, Faculty of Physics, Weizmann Institute of Science)
Title: A Framework to Map Circumstellar Material Around Infant Core-Collapse Supernovae
Abstract:
Observing Supernovae (SNe) shortly after they explode is key to probing the final stages leading to their progenitor star demise, the progenitor star properties, and the physics behind the explosion itself. Recent studies have shown that the majority of core-collapse SNe explode within a distribution of circumstellar material (CSM), ejected by the progenitor star. As the SN shock interacts with the CSM, observations in different wavelengths create a map of the CSM distribution. UV-optical photometry tracks the distribution of confined and dense CSM. This includes UV-optical spectroscopy that shows CSM narrow emission lines that track the CSM density, the progenitor envelope chemistry and the SN-CSM interaction. Later, as the shock moves onto the CSM thinner extended wind, where X-rays from the heated thinner CSM can be observed. By tracking the X-ray emission from the extended wind, we can map the optically thinner parts of the CSM further. Thus, using multi-wavelength observations, we can map the distribution of CSM above the exploding star, which originated from different episodes of mass-loss in its most recent history. In this talk, I will present this framework which was first used to create a detailed CSM map of the decadal 7 Mpc SN 2023ixf in Zimmerman et al. 2024. I will further discuss how this framework can be expanded to more distant SNe, to gather statistics on the distribution of CSM around interacting SNe.
Zoom link:
https://huji.zoom.us/j/87322755223?pwd=lTaUtpgbP6mFwJhyCNx4GJIa8CxaiE.1
Meeting ID: 873 2275 5223
Passcode: 583878
Contact: Dima Ofengeim
Title: A Framework to Map Circumstellar Material Around Infant Core-Collapse Supernovae
Abstract:
Observing Supernovae (SNe) shortly after they explode is key to probing the final stages leading to their progenitor star demise, the progenitor star properties, and the physics behind the explosion itself. Recent studies have shown that the majority of core-collapse SNe explode within a distribution of circumstellar material (CSM), ejected by the progenitor star. As the SN shock interacts with the CSM, observations in different wavelengths create a map of the CSM distribution. UV-optical photometry tracks the distribution of confined and dense CSM. This includes UV-optical spectroscopy that shows CSM narrow emission lines that track the CSM density, the progenitor envelope chemistry and the SN-CSM interaction. Later, as the shock moves onto the CSM thinner extended wind, where X-rays from the heated thinner CSM can be observed. By tracking the X-ray emission from the extended wind, we can map the optically thinner parts of the CSM further. Thus, using multi-wavelength observations, we can map the distribution of CSM above the exploding star, which originated from different episodes of mass-loss in its most recent history. In this talk, I will present this framework which was first used to create a detailed CSM map of the decadal 7 Mpc SN 2023ixf in Zimmerman et al. 2024. I will further discuss how this framework can be expanded to more distant SNe, to gather statistics on the distribution of CSM around interacting SNe.
Zoom link:
https://huji.zoom.us/j/87322755223?pwd=lTaUtpgbP6mFwJhyCNx4GJIa8CxaiE.1
Meeting ID: 873 2275 5223
Passcode: 583878
Contact: Dima Ofengeim