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Date and Time of the Query: 2019-03-19 T12:39:32 PDT
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For refcode 2015MNRAS.450.3137T:
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Copyright by Royal Astronomical Society. 2015MNRAS.450.3137T SN 2009ib: a Type II-P supernova with an unusually long plateau Takats, K.; Pignata, G.; Pumo, M. L.; Paillas, E.; Zampieri, L.; Elias-Rosa, N.; Benetti, S.; Bufano, F.; Cappellaro, E.; Ergon, M.; Fraser, M.; Hamuy, M.; Inserra, C.; Kankare, E.; Smartt, S. J.; Stritzinger, M. D.; Van Dyk, S. D.; Haislip, J. B.; LaCluyze, A. P.; Moore, J. P.; Reichart, D. Abstract. We present optical and near-infrared photometry and spectroscopy of SN 2009ib, a Type II-P supernova in NGC 1559. This object has moderate brightness, similar to those of the intermediate-luminosity SNe 2008in and 2009N. Its plateau phase is unusually long, lasting for about 130 d after explosion. The spectra are similar to those of the subluminous SN 2002gd, with moderate expansion velocities. We estimate the ^56^Ni mass produced as 0.046 +/- 0.015 M_sun_. We determine the distance to SN 2009ib using both the expanding photosphere method (EPM) and the standard candle method. We also apply EPM to SN 1986L, a Type II-P SN that exploded in the same galaxy. Combining the results of different methods, we conclude the distance to NGC 1559 as D = 19.8 +/- 3.0 Mpc. We examine archival, pre-explosion images of the field taken with the Hubble Space Telescope, and find a faint source at the position of the SN, which has a yellow colour [(V - I)_0_ = 0.85 mag]. Assuming it is a single star, we estimate its initial mass as M_ZAMS_ = 20 M_sun_. We also examine the possibility, that instead of the yellow source the progenitor of SN 2009ib is a red supergiant star too faint to be detected. In this case, we estimate the upper limit for the initial zero-age main sequence (ZAMS) mass of the progenitor to be ~14-17 M_sun_. In addition, we infer the physical properties of the progenitor at the explosion via hydrodynamical modelling of the observables, and estimate the total energy as ~0.55 x 10^51^ erg, the pre-explosion radius as ~400 R_sun_, and the ejected envelope mass as ~15 M_sun_, which implies that the mass of the progenitor before explosion was ~16.5-17 M_sun_. Key words: supernovae: general, supernovae: individual: SN 2009ib, galaxies: individual: NGC 1559
Retrieve 27 NED objects in this reference.
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