NOAO >   Observing Info >   Approved Programs >   2018A-0343

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Program Information for 2018A-0343


PI: Giacomo Terreran, Northwestern U., giacomo.terreran@northwestern.edu
Address: 2145 Sheridan Road, IL 60208, Evanston, Illinois 60208

CoI: Raffaella Margutti, Northwestern U.
CoI: Danny Milisavljevic, Purdue U.
CoI: Wen-fai Fong, Northwestern U.
CoI: Deanne Coppejans, Northwestern U.
CoI: Maria Drout, Carnegie Observatories
CoI: Matt Nicholl, Harvard-Smithsonian Center for Astrophysics
CoI: Aprajita Hajela, Northwestern U.

Title: Interacting SNe

Abstract: Observations have recently led to the realization that massive stars experience violent mass-loss events in the final stages before core- collapse. This erratic mass-loss, timed with stellar death, challenges long-held notions of stellar evolution. At the time of the explosion, the supernova (SN) ejecta interact with the material lost by the stellar progenitor before death. This interaction (i) produces unique spectroscopic features, (ii) allows for a more efficient conversion of shock kinetic energy into radiation, leading to more luminous SNe for a longer time; (iii) probes centuries of mass-loss history of the progenitor star, providing textit{unique} insight into the final years of a massive star. Here we propose a focused SOAR spectroscopic monitoring program, as part of our multi-wavelength investigation of SNe (radio to X-rays). In particular, we propose to acquire 4 epochs of spectroscopy for 3 interacting SNe. In parallel, we will conduct a photometric follow-up of the transients using the CT-1.3m telescope. With this study we will reconstruct the geometry, the density and chemical composition of the circumstellar material, shedding new light onto the still unknown nature of the mass-loss events during the final stages of evolution of massive stars.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2018A):  CT-1.3m/ANDI -- 18hrs


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2018A-0343

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