Pan, Y.-C.Foley, R.J.Kromer, M.Fox, O.D.Zheng, W.Challis, P.Clubb, K.Filippenko, A.V.Folatelli, G.Graham, M.L.Hillebrandt, W.Kirshner, R.P.Lee, W.H.Pakmor, R.Patat, F.Phillips, M.M.Pignata, G.Röpke, F.Seitenzahl, I.Silverman, J.M.Simon, J.D.Sternberg, A.Stritzinger, M.D.Taubenberger, S.Vinko, J.Wheeler, J.C.2023-04-102023-04-102015-07Monthly Notices of the Royal Astronomical Society Volume 452, Issue 4, Pages 4307 - 432516 July 20150035-8711https://repositorio.unab.cl/xmlui/handle/ria/48375Indexación: ScopusSN 2013dy is a Type Ia supernova (SN Ia) for which we have compiled an extraordinary data set spanning from 0.1 to ~ 500 d after explosion. We present 10 epochs of ultraviolet (UV) through near-infrared (NIR) spectra with Hubble Space Telescope/Space Telescope Imaging Spectrograph, 47 epochs of optical spectra (15 of them having high resolution), and more than 500 photometric observations in the BVrRiIZYJH bands. SN 2013dy has a broad and slowly declining light curve (Δm15(B)=0.92 mag), shallow Si II λ6355 absorption, and a low velocity gradient. We detect strong C II in our earliest spectra, probing unburned progenitor material in the outermost layers of the SN ejecta, but this feature fades within a few days. The UV continuum of SN 2013dy, which is strongly affected by the metal abundance of the progenitor star, suggests that SN 2013dy had a relatively high-metallicity progenitor. Examining one of the largest single set of high-resolution spectra for an SN Ia, we find no evidence of variable absorption from circumstellar material. Combining our UV spectra, NIR photometry, and high-cadence optical photometry, we construct a bolometric light curve, showing that SN 2013dy had a maximum luminosity of 10.0+4.8 -3.8 × 1042 erg s-1. We compare the synthetic light curves and spectra of several models to SN 2013dy, finding that SN 2013dy is in good agreement with a solar-metallicity W7 model. © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.enSupernovaeWhite DwarfsCompanion StarsArtículoAtribución 4.0 Internacional (CC BY 4.0)10.1093/mnras/stv1605