Monitoring the Continuing Spectral Evolution of Nova Delphini 2013 (V339 Del) with Low Resolution Spectroscopy

Volume 44 number 1 (2016)

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Howard D. Mooers

Department of Earth and Environmental Sciences, University of Minnesota Duluth, Duluth, MN 55812; hmooers@d.umn.edu

William S. Wiethoff

Department of Earth and Environmental Sciences, University of Minnesota Duluth, Duluth, MN 55812

Alexander Evich

Department of Physics and Astronomy, University of Minnesota Duluth, Duluth, MN 55812

Abstract

The continuing spectral evolution of Nova Delphini 2013 is presented with low-resolution spectroscopy collected with a 100 line per millimeter diffraction grating. Spectra were collected on 3 July, 2014 and 14 September, 2015, +321 and +759 days after peak visible brightness on 16 August, 2013. Imaging system was mounted on an equatorially–mounted, 14-inch Schmidt-Cassegrain telescope. The continuum is no longer visible in the spectra, however, Oiii (5007 Å) and Ha (6563 Å) are prominent and Nii (5755), Hg (4340 Å) and Ciii/Niii (4640 Å) can still be discerned at +759 days.