PI: Kelsie Krafton, Louisiana State U., firstname.lastname@example.org
Address: 233 Nicholson, Louisiana State University, Baton Rouge, LA, 70803 USA
CoI: Geoffrey Clayton, Louisiana State U.
CoI: Michael J Barlow, University College London
CoI: Roger Wesson, ESO
CoI: Jennifer Andrews, U. of Arizona
CoI: Ilse De Looze, University College London
CoI: Antonia Bevan, University College London
CoI: Dan Milisavljevic, Harvard-Smithsonian Center for Astrophysics
Title: Red-Blue Line Asymmetries in CCSNe
Abstract: We propose to observe with Gemini North a sample of 13 core-collapse supernovae with ages in 2016 ranging from 4 to 40 years, and to model the effects of ejecta dust in producing line asymmetries in their late-time spectra. Building on our colleagues' recent work at UCL, modelling SN 1987A’s very late epoch spectra, the Hα line profiles in our sample will be modelled with our new radiative transfer code DAMOCLES to derive ejecta dust masses by fitting observed red-blue asymmetries and extended red scattering wings. The simultaneous modelling of emission lines spanning from 470 to 740 nm, in order to cover [OIII] 4959,5007, [OI] 6300,6363, Halpha and [OII] 7319,7330, can be used to constrain the properties and ejecta locations of the dust grains formed. With our sample covering a wide range of ejecta ages, we aim to accurately constrain the total dust masses formed and their rate of growth with time, enabling a quantification of the contribution of core-collapse supernova dust to the dust mass budgets of galaxies.
Program Type: Standard/Extragalactic
Run 1 (2017A): GEM-NQ/GMOSN -- 30.3hrs band 3 (GN-2017A-Q-72)
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360