We present ultraviolet, optical, near-infrared photometry and spectroscopy of SN 2009N in NGC 4487. This object is a Type II-P supernova with spectra resembling those of subluminous II-P supernovae, while its bolometric luminosity is similar to that of the intermediate-luminosity SN 2008in. We created synow models of the plateau phase spectra for line identification and to measure the expansion velocity. In the near-infrared spectra we find signs indicating possible weak interaction between the supernova ejecta and the pre-existing circumstellar material. These signs are also present in the previously unpublished near-infrared spectra of SN 2008in. The distance to SN 2009N is determined via the expanding photosphere method and the standard candle method as D = 21.6 ± 1.1 Mpc. The produced nickel-mass is estimated to be ̃0.020 ± 0.004 M⊙. We infer the physical properties of the progenitor at the explosion through hydrodynamical modelling of the observables. We find the values of the total energy as ̃0.48 × 1051 erg, the ejected mass as ̃11.5 M⊙, and the initial radius as ̃287 R⊙. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
CITATION STYLE
Takáts, K., Pumo, M. L., Elias-Rosa, N., Pastorello, A., Pignata, G., Paillas, E., … Reichart, D. (2014). SN 2009N: Linking normal and subluminous type II-P SNe. Monthly Notices of the Royal Astronomical Society, 438(1), 368–387. https://doi.org/10.1093/mnras/stt2203
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