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  • Izzo, L. (author)

Signatures of a jet cocoon in early spectra of a supernova associated with a γ-ray burst

  • Article/chapterEnglish2019

Publisher, publication year, extent ...

  • 2019-01-16
  • Springer Science and Business Media LLC,2019
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-165653
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-165653URI
  • https://doi.org/10.1038/s41586-018-0826-3DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

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

Notes

  • Long gamma-ray bursts are associated with energetic, broad-lined, stripped-envelope supernovae(1,2) and as such mark the death of massive stars. The scarcity of such events nearby and the brightness of the gamma-ray burst afterglow, which dominates the emission in the first few days after the burst, have so far prevented the study of the very early evolution of supernovae associated with gamma-ray bursts(3). In hydrogen-stripped supernovae that are not associated with gamma-ray bursts, an excess of high-velocity (roughly 30,000 kilometres per second) material has been interpreted as a signature of a choked jet, which did not emerge from the progenitor star and instead deposited all of its energy in a thermal cocoon(4). Here we report multi-epoch spectroscopic observations of the supernova SN 2017iuk, which is associated with the gamma-ray burst GRB 171205A. Our spectra display features at extremely high expansion velocities (around 115,000 kilometres per second) within the first day after the burst(5,6). Using spectral synthesis models developed for SN 2017iuk, we show that these features are characterized by chemical abundances that differ from those observed in the ejecta of SN 2017iuk at later times. We further show that the high-velocity features originate from the mildly relativistic hot cocoon that is generated by an ultra-relativistic jet within the gamma-ray burst expanding and decelerating into the medium that surrounds the progenitor star(7,8). This cocoon rapidly becomes transparent(9) and is outshone by the supernova emission, which starts to dominate the emission three days after the burst.

Subject headings and genre

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

  • de Ugarte Postigo, A. (author)
  • Maeda, K. (author)
  • Thone, C. C. (author)
  • Kann, D. A. (author)
  • Della Valle, M. (author)
  • Sagués Carracedo, AnaStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)anca9835 (author)
  • Michalowski, M. J. (author)
  • Schady, P. (author)
  • Schmidl, S. (author)
  • Selsing, J. (author)
  • Starling, R. L. C. (author)
  • Suzuki, A. (author)
  • Bensch, K. (author)
  • Bolmer, J. (author)
  • Campana, S. (author)
  • Cano, Z. (author)
  • Covino, S. (author)
  • Fynbo, J. P. U. (author)
  • Hartmann, D. H. (author)
  • Heintz, K. E. (author)
  • Hjorth, J. (author)
  • Japelj, J. (author)
  • Kaminski, K. (author)
  • Kaper, L. (author)
  • Kouveliotou, C. (author)
  • Kruzynski, M. (author)
  • Kwiatkowski, T. (author)
  • Leloudas, G. (author)
  • Levan, A. J. (author)
  • Malesani, D. B. (author)
  • Michalowski, T. (author)
  • Piranomonte, S. (author)
  • Pugliese, G. (author)
  • Rossi, A. (author)
  • Sanchez-Ramirez, R. (author)
  • Schulze, S. (author)
  • Steeghs, D. (author)
  • Tanvir, N. R. (author)
  • Ulaczyk, K. (author)
  • Vergani, S. D. (author)
  • Wiersema, K. (author)
  • Stockholms universitetFysikum (creator_code:org_t)

Related titles

  • In:Nature: Springer Science and Business Media LLC565:7739, s. 324-+0028-08361476-4687

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