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SN 2009md :
SN 2009md : another faint supernova from a low-mass progenitor
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Fraser, M. (author)
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- Ergon, Mattias (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Eldridge, J. J. (author)
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Valenti, S. (author)
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Pastorello, A. (author)
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- Sollerman, Jesper (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),The Oskar Klein Centre
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Smartt, S. J. (author)
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Agnoletto, I. (author)
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Arcavi, I. (author)
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Benetti, S. (author)
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Botticella, M.-T. (author)
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Bufano, F. (author)
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Campillay, A. (author)
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Crockett, R. M. (author)
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Gal-Yam, A. (author)
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Kankare, E. (author)
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Leloudas, G. (author)
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Maguire, K. (author)
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Mattila, S. (author)
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Maund, J. R. (author)
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Salgado, F. (author)
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Stephens, A. (author)
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Taubenberger, S. (author)
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Turatto, M. (author)
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(creator_code:org_t)
- 2011-09-09
- 2011
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 417, s. 1417-1433
- Related links:
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https://academic.oup...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- 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+0.25-0.39 mag, corresponding to a progenitor luminosity of log L/L&sun;˜ 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+6.5-1.5 M&sun;. 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) × 10-3 M&sun; 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&sun;˜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&sun;).
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- stars: evolution
- stars: massive
- supernovae: general
- supernovae: individual: SN 2009md
- galaxies: individual: NGC 3389
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Fraser, M.
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Ergon, Mattias
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Eldridge, J. J.
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Valenti, S.
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Pastorello, A.
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Sollerman, Jespe ...
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show more...
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Smartt, S. J.
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Agnoletto, I.
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Arcavi, I.
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Benetti, S.
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Botticella, M.-T ...
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Bufano, F.
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Campillay, A.
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Crockett, R. M.
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Gal-Yam, A.
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Kankare, E.
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Leloudas, G.
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Maguire, K.
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Mattila, S.
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Maund, J. R.
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Salgado, F.
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Stephens, A.
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Taubenberger, S.
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Turatto, M.
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show less...
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NATURAL SCIENCES
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Stockholm University