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

Abstract

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{sup 42} erg s{sup -1} and photospheric velocities of {approx}11,000 km s{sup -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{sub 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{sub Sun },more » corresponding to a zero-age main-sequence mass between 14 and 26 M{sub Sun} (depending on A{sub V} ), which would make this one of the most massive progenitors found for a core-collapse SN to date.« less

Authors:
; ; ; ; ;  [1]; ;  [2]; ; ; ; ; ;  [3];  [4]; ; ;  [5];  [6];  [7]
  1. School of Mathematics and Physics, Queens University Belfast, Belfast BT7 1NN (United Kingdom)
  2. INAF Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, I-80131 Napoli (Italy)
  3. INAF Osservatorio Astronomico di Padova, vicolo dell Osservatorio 5, I-35122 Padova (Italy)
  4. Department of Physics, University of Auckland, Private Bag 92019, Auckland (New Zealand)
  5. Oskar Klein Centre, Department of Astronomy, AlbaNova, Stockholm University, SE-10691 Stockholm (Sweden)
  6. Tuorla Observatory, Department of Physics and Astronomy, University of Turku, Vaeisaelaentie 20, FI-21500 Piikkioe (Finland)
  7. Gemini Observatory, 670 North Aohoku Place, Hilo, HI 96720 (United States)
Publication Date:
OSTI Identifier:
22078462
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 759; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BOLOMETERS; COSMIC DUST; ENERGY SPECTRA; EXPLOSIONS; IMAGES; LUMINOSITY; PHOTOSPHERE; STAR EVOLUTION; SUPERNOVAE

Citation Formats

Fraser, M., Maund, J. R., Smartt, S. J., Inserra, C., Kotak, R., Reilly, E., Botticella, M.-T., Dall'Ora, M., Tomasella, L., Benetti, S., Ciroi, S., Ochner, P., Pastorello, A., Valenti, S., Eldridge, J. J., Ergon, M., Sollerman, J., Taddia, F., Mattila, S., and Stephens, A., E-mail: m.fraser@qub.ac.uk. RED AND DEAD: THE PROGENITOR OF SN 2012aw IN M95. United States: N. p., 2012. Web. doi:10.1088/2041-8205/759/1/L13.
Fraser, M., Maund, J. R., Smartt, S. J., Inserra, C., Kotak, R., Reilly, E., Botticella, M.-T., Dall'Ora, M., Tomasella, L., Benetti, S., Ciroi, S., Ochner, P., Pastorello, A., Valenti, S., Eldridge, J. J., Ergon, M., Sollerman, J., Taddia, F., Mattila, S., & Stephens, A., E-mail: m.fraser@qub.ac.uk. RED AND DEAD: THE PROGENITOR OF SN 2012aw IN M95. United States. doi:10.1088/2041-8205/759/1/L13.
Fraser, M., Maund, J. R., Smartt, S. J., Inserra, C., Kotak, R., Reilly, E., Botticella, M.-T., Dall'Ora, M., Tomasella, L., Benetti, S., Ciroi, S., Ochner, P., Pastorello, A., Valenti, S., Eldridge, J. J., Ergon, M., Sollerman, J., Taddia, F., Mattila, S., and Stephens, A., E-mail: m.fraser@qub.ac.uk. Thu . "RED AND DEAD: THE PROGENITOR OF SN 2012aw IN M95". United States. doi:10.1088/2041-8205/759/1/L13.
@article{osti_22078462,
title = {RED AND DEAD: THE PROGENITOR OF SN 2012aw IN M95},
author = {Fraser, M. and Maund, J. R. and Smartt, S. J. and Inserra, C. and Kotak, R. and Reilly, E. and Botticella, M.-T. and Dall'Ora, M. and Tomasella, L. and Benetti, S. and Ciroi, S. and Ochner, P. and Pastorello, A. and Valenti, S. and Eldridge, J. J. and Ergon, M. and Sollerman, J. and Taddia, F. and Mattila, S. and Stephens, A., E-mail: m.fraser@qub.ac.uk},
abstractNote = {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{sup 42} erg s{sup -1} and photospheric velocities of {approx}11,000 km s{sup -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{sub 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{sub Sun }, corresponding to a zero-age main-sequence mass between 14 and 26 M{sub Sun} (depending on A{sub V} ), which would make this one of the most massive progenitors found for a core-collapse SN to date.},
doi = {10.1088/2041-8205/759/1/L13},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 1,
volume = 759,
place = {United States},
year = {2012},
month = {11}
}