Supernova 2012ec: identification of the progenitor and early monitoring with PESSTO
2013 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 431, no 1, l102-L106 p.Article in journal (Refereed) Published
We present the identification of the progenitor of the Type IIP SN 2012ec in archival pre-explosion Hubble Space Telescope Wide Field Planetary Camera 2 (WFPC2) and Advanced Camera for Surveys Wide Field Channel F814W images. The properties of the progenitor are further constrained by non-detections in pre-explosion WFPC2 F450W and F606W images. We report a series of early photometric and spectroscopic observations of SN 2012ec. The r' -band light curve shows a plateau with M-r' = -17.0. The early spectrum is similar to the Type IIP SN 1999em, with the expansion velocity measured at Ha absorption minimum of -11 700 km s(-1) (at 1 d post-discovery). The photometric and spectroscopic evolution of SN 2012ec shows it to be a Type IIP SN, discovered only a few days post-explosion (<6 d). We derive a luminosity for the progenitor, in comparison with MARCS model spectral energy distributions, of log L/L-circle dot = 5.15 +/- 0.19, from which we infer an initial mass range of 14-22M(circle dot). This is the first SN with an identified progenitor to be followed by the Public ESO Spectroscopic Survey of Transient Objects (PESSTO).
Place, publisher, year, edition, pages
2013. Vol. 431, no 1, l102-L106 p.
supernovae: general, supernovae: individual: 2012ec, galaxies: individual: NGC 1084
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:su:diva-90782DOI: 10.1093/mnrasl/slt017ISI: 000318343600022OAI: oai:DiVA.org:su-90782DiVA: diva2:628627
FunderEU, FP7, Seventh Framework Programme, 291222EU, European Research Council