English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present ultraviolet, optical, near-infrared photometry and spectroscopy ofSN 2009N in NGC 4487. This object is a type II-P supernova with spectraresembling those of subluminous II-P supernovae, while its bolometricluminosity is similar to that of the intermediate luminosity SN 2008in. Wecreated SYNOW models of the plateau phase spectra for line identification andto measure the expansion velocity. In the near-infrared spectra we find signsindicating possible weak interaction between the supernova ejecta and thepre-existing circumstellar material. These signs are also present in thepreviously unpublished near-infrared spectra of SN 2008in. The distance to SN2009N is determined via the expanding photosphere method and the standardcandle method as $D= 21.6 \pm 1.1\,{\mathrm {Mpc}}$. The produced nickel-massis estimated to be $\sim 0.020 \pm 0.004\,{\mathrm M_\odot}$. We infer thephysical properties of the progenitor at the explosion through hydrodynamicalmodelling of the observables. We find the values of the total energy as $\sim0.48 \times 10^{51}\, {\mathrm {erg}}$, the ejected mass as $\sim11.5\,{\mathrm M_\odot}$, and the initial radius as $\sim 287\,{\mathrmR_\odot}$.

SN 2009N: Linking normal and subluminous type II-P SNe