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  • Fraser, M. (author)

RED AND DEAD : THE PROGENITOR OF SN 2012aw IN M95

  • Article/chapterEnglish2012

Publisher, publication year, extent ...

  • 2012
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-83036
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-83036URI
  • https://doi.org/10.1088/2041-8205/759/1/L13DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • AuthorCount:20;
  • Core-collapse supernovae (SNe) are the spectacular finale to massive stellar evolution. In this Letter, we identify a progenitor for the nearby core-collapse SN 2012aw in both ground-based near-infrared and space-based optical pre-explosion imaging. The SN itself appears to be a normal Type II Plateau event, reaching a bolometric luminosity of 10(42) erg s(-1) and photospheric velocities of similar to 11,000 km s(-1) from the position of the H beta P-Cygni minimum in the early SN spectra. We use an adaptive optics image to show that the SN is coincident to within 27 mas with a faint, red source in pre-explosion HST+WFPC2, VLT+ISAAC, and NTT+SOFI images. The source has magnitudes F555W = 26.70 +/- 0.06, F814W = 23.39 +/- 0.02, J = 21.1 +/- 0.2, K = 19.1 +/- 0.4, which, when compared to a grid of stellar models, best matches a red supergiant. Interestingly, the spectral energy distribution of the progenitor also implies an extinction of A(V) > 1.2 mag, whereas the SN itself does not appear to be significantly extinguished. We interpret this as evidence for the destruction of dust in the SN explosion. The progenitor candidate has a luminosity between 5.0 and 5.6 log L/L-circle dot, corresponding to a zero-age main-sequence mass between 14 and 26 M-circle dot (depending on A(V)), which would make this one of the most massive progenitors found for a core-collapse SN to date.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Maund, J. R. (author)
  • Smartt, S. J. (author)
  • Botticella, M-T (author)
  • Dall'Ora, M. (author)
  • Inserra, C. (author)
  • Tomasella, L. (author)
  • Benetti, S. (author)
  • Ciroi, S. (author)
  • Eldridge, J. J. (author)
  • Ergon, MattiasStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)maer0651 (author)
  • Kotak, R. (author)
  • Mattila, S. (author)
  • Ochner, P. (author)
  • Pastorello, A. (author)
  • Reilly, E. (author)
  • Sollerman, JesperStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)solle (author)
  • Stephens, A. (author)
  • Taddia, FrancescoStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)ftadd (author)
  • Valenti, S. (author)
  • Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

Related titles

  • In:The Astrophysical Journal Letters759:1, s. L13-2041-8205

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