SIMBAD references

2011MNRAS.417.1417F - Mon. Not. R. Astron. Soc., 417, 1417-1433 (2011/October-3)

SN 2009md: another faint supernova from a low-mass progenitor.

FRASER M., ERGON M., ELDRIDGE J.J., VALENTI S., PASTORELLO A., SOLLERMAN J., SMARTT S.J., AGNOLETTO I., ARCAVI I., BENETTI S., BOTTICELLA M.-T., BUFANO F., CAMPILLAY A., CROCKETT R.M., GAL-YAM A., KANKARE E., LELOUDAS G., MAGUIRE K., MATTILA S., MAUND J.R., SALGADO F., STEPHENS A., TAUBENBERGER S. and TURATTO M.

Abstract (from CDS):

We present adaptive optics imaging of the core-collapse supernova (SN) 2009md, which we use together with archival Hubble Space Telescope data to identify a coincident progenitor candidate. We find the progenitor to have an absolute magnitude of V=-4.63+0.3–0.4 mag and a colour of V-I= 2.29+0.25–0.39mag, corresponding to a progenitor luminosity of log L/L∼ 4.54±0.19 dex. Using the stellar evolution code STARS, we find this to be consistent with a red supergiant progenitor with M= 8.5+6.5–1.5M. The photometric and spectroscopic evolution of SN 2009md is similar to that of the class of sub-luminous Type IIP SNe; in this paper we compare the evolution of SN 2009md primarily to that of the sub-luminous SN 2005cs. We estimate the mass of 56Ni ejected in the explosion to be (5.4±1.3) {x} 10–3 M from the luminosity on the radioactive tail, which is in agreement with the low 56Ni masses estimated for other sub-luminous Type IIP SNe. From the light curve and spectra, we show the SN explosion had a lower energy and ejecta mass than the normal Type IIP SN 1999em. We discuss problems with stellar evolutionary models, and the discrepancy between low observed progenitor luminosities (log L/L∼ 4.3–5 dex) and model luminosities after the second dredge-up for stars in this mass range, and consider an enhanced carbon burning rate as a possible solution. In conclusion, SN 2009md is a faint SN arising from the collapse of a progenitor close to the lower mass limit for core collapse. This is now the third discovery of a low-mass progenitor star producing a low-energy explosion and low 56Ni ejected mass, which indicates that such events arise from the lowest end of the mass range that produces a core-collapse SN (7–8 M).

Abstract Copyright: 2011 The Authors. Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): stars: evolution - stars: massive - supernovae: general - supernovae: individual: SN 2009md - galaxies: individual: NGC 3389

Simbad objects: 34

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2021.05.13-19:03:27

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