High-resolution spectroscopy of SN 2017hcc and its blueshifted line profiles from post-shock dust formation
Nathan Smith,
Jennifer E. Andrews
Abstract:SN 2017hcc was remarkable for being a nearby and strongly polarized superluminous Type IIn supernova (SN). We obtained high-resolution echelle spectra that we combine with other spectra to investigate its line profile evolution. All epochs reveal narrow P Cygni components from pre-shock circumstellar material (CSM), indicating an axisymmetric outflow from the progenitor of 40-50 km s −1 . Intermediate-width and broad components exhibit the classic evolution seen in luminous SNe IIn: symmetric Lorentzian profil… Show more
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