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Title: THE YELLOW SUPERGIANT PROGENITOR OF THE TYPE II SUPERNOVA 2011dh IN M51

Abstract

We present the detection of the putative progenitor of the Type IIb SN 2011dh in archival pre-explosion Hubble Space Telescope images. Using post-explosion Adaptive Optics imaging with Gemini NIRI+ALTAIR, the position of the supernova (SN) in the pre-explosion images was determined to within 23 mas. The progenitor candidate is consistent with an F8 supergiant star (logL/L{sub sun} = 4.92 {+-} 0.20 and T {sub eff} = 6000 {+-} 280 K). Through comparison with stellar evolution tracks, this corresponds to a single star at the end of core C-burning with an initial mass of M{sub ZAMS} = 13 {+-} 3 M{sub sun}. The possibility of the progenitor source being a cluster is rejected, on the basis of: (1) the source not being spatially extended, (2) the absence of excess H{alpha} emission, and (3) the poor fit to synthetic cluster spectral energy distributions (SEDs). It is unclear if a binary companion is contributing to the observed SED, although given the excellent correspondence of the observed photometry to a single star SED we suggest that the companion does not contribute significantly. Early photometric and spectroscopic observations show fast evolution similar to the transitional Type IIb SN 2008ax and suggest that a large amountmore » of the progenitor's hydrogen envelope was removed before explosion. Late-time observations will reveal if the yellow supergiant or the putative companion star were responsible for this SN explosion.« less

Authors:
 [1]; ; ; ;  [2]; ;  [3];  [4]; ; ;  [5];  [6];  [7];  [8]
  1. Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej, DK-2100 Copenhagen Oe (Denmark)
  2. Astrophysics Research Center, School of Mathematics and Physics, Queens University Belfast, Belfast, BT7 1NN (United Kingdom)
  3. Oskar Klein Centre, Department of Astronomy, AlbaNova, Stockholm University, 106 91 Stockholm (Sweden)
  4. Dipartimento di Astronomia, Universita di Padova, Vicolo dell'Osservatorio 3, 35122 Padova (Italy)
  5. INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova (Italy)
  6. INAF-Osservatorio Astronomico di Catania, Via S.Sofia 78, 95123 Catania (Italy)
  7. INAF Osservatorio Astronomico di Trieste and Dipartimento di Fisica, Sezione di Astronomia, Universit di Trieste, via G.B. Tiepolo 11, 34131 Trieste (Italy)
  8. Gemini Observatory, 670 North Aohoku Place, Hilo, HI 96720 (United States)
Publication Date:
OSTI Identifier:
21565439
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 739; Journal Issue: 2; Other Information: DOI: 10.1088/2041-8205/739/2/L37; Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; PHOTOMETRY; STAR EVOLUTION; SUPERGIANT STARS; SUPERNOVAE; BINARY STARS; ERUPTIVE VARIABLE STARS; EVOLUTION; GIANT STARS; STARS; VARIABLE STARS

Citation Formats

Maund, J. R., Fraser, M., Smartt, S. J., Kotak, R., Magill, L., Ergon, M., Sollerman, J., Pastorello, A., Benetti, S., Botticella, M.-T., Valenti, S., Bufano, F., Danziger, I. J., and Stephens, A. W., E-mail: justyn@dark-cosmology.dk. THE YELLOW SUPERGIANT PROGENITOR OF THE TYPE II SUPERNOVA 2011dh IN M51. United States: N. p., 2011. Web. doi:10.1088/2041-8205/739/2/L37.
Maund, J. R., Fraser, M., Smartt, S. J., Kotak, R., Magill, L., Ergon, M., Sollerman, J., Pastorello, A., Benetti, S., Botticella, M.-T., Valenti, S., Bufano, F., Danziger, I. J., & Stephens, A. W., E-mail: justyn@dark-cosmology.dk. THE YELLOW SUPERGIANT PROGENITOR OF THE TYPE II SUPERNOVA 2011dh IN M51. United States. doi:10.1088/2041-8205/739/2/L37.
Maund, J. R., Fraser, M., Smartt, S. J., Kotak, R., Magill, L., Ergon, M., Sollerman, J., Pastorello, A., Benetti, S., Botticella, M.-T., Valenti, S., Bufano, F., Danziger, I. J., and Stephens, A. W., E-mail: justyn@dark-cosmology.dk. Sat . "THE YELLOW SUPERGIANT PROGENITOR OF THE TYPE II SUPERNOVA 2011dh IN M51". United States. doi:10.1088/2041-8205/739/2/L37.
@article{osti_21565439,
title = {THE YELLOW SUPERGIANT PROGENITOR OF THE TYPE II SUPERNOVA 2011dh IN M51},
author = {Maund, J. R. and Fraser, M. and Smartt, S. J. and Kotak, R. and Magill, L. and Ergon, M. and Sollerman, J. and Pastorello, A. and Benetti, S. and Botticella, M.-T. and Valenti, S. and Bufano, F. and Danziger, I. J. and Stephens, A. W., E-mail: justyn@dark-cosmology.dk},
abstractNote = {We present the detection of the putative progenitor of the Type IIb SN 2011dh in archival pre-explosion Hubble Space Telescope images. Using post-explosion Adaptive Optics imaging with Gemini NIRI+ALTAIR, the position of the supernova (SN) in the pre-explosion images was determined to within 23 mas. The progenitor candidate is consistent with an F8 supergiant star (logL/L{sub sun} = 4.92 {+-} 0.20 and T {sub eff} = 6000 {+-} 280 K). Through comparison with stellar evolution tracks, this corresponds to a single star at the end of core C-burning with an initial mass of M{sub ZAMS} = 13 {+-} 3 M{sub sun}. The possibility of the progenitor source being a cluster is rejected, on the basis of: (1) the source not being spatially extended, (2) the absence of excess H{alpha} emission, and (3) the poor fit to synthetic cluster spectral energy distributions (SEDs). It is unclear if a binary companion is contributing to the observed SED, although given the excellent correspondence of the observed photometry to a single star SED we suggest that the companion does not contribute significantly. Early photometric and spectroscopic observations show fast evolution similar to the transitional Type IIb SN 2008ax and suggest that a large amount of the progenitor's hydrogen envelope was removed before explosion. Late-time observations will reveal if the yellow supergiant or the putative companion star were responsible for this SN explosion.},
doi = {10.1088/2041-8205/739/2/L37},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 2,
volume = 739,
place = {United States},
year = {2011},
month = {10}
}