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  • Kool, Erik C.Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC) (author)

A radio-detected type Ia supernova with helium-rich circumstellar material

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2023
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-223960
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-223960URI
  • https://doi.org/10.1038/s41586-023-05916-wDOI

Supplementary language notes

  • Language:English
  • Summary in:English

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

Notes

  • Type Ia supernovae (SNe Ia) are thermonuclear explosions of degenerate white dwarf stars destabilized by mass accretion from a companion star1, but the nature of their progenitors remains poorly understood. A way to discriminate between progenitor systems is through radio observations; a non-degenerate companion star is expected to lose material through winds2 or binary interaction3 before explosion, and the supernova ejecta crashing into this nearby circumstellar material should result in radio synchrotron emission. However, despite extensive efforts, no type Ia supernova (SN Ia) has ever been detected at radio wavelengths, which suggests a clean environment and a companion star that is itself a degenerate white dwarf star4,5. Here we report on the study of SN 2020eyj, a SN Ia showing helium-rich circumstellar material, as demonstrated by its spectral features, infrared emission and, for the first time in a SN Ia to our knowledge, a radio counterpart. On the basis of our modelling, we conclude that the circumstellar material probably originates from a single-degenerate binary system in which a white dwarf accretes material from a helium donor star, an often proposed formation channel for SNe Ia (refs. 6,7). We describe how comprehensive radio follow-up of SN 2020eyj-like SNe Ia can improve the constraints on their progenitor systems.

Subject headings and genre

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

  • Pearson Johansson, Joel,1984-Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Institutionen för astronomi(Swepub:su)joeljo (author)
  • Sollerman, Jesper,1968-Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)solle (author)
  • Moldón, Javier (author)
  • Moriya, Takashi J. (author)
  • Mattila, Seppo (author)
  • Schulze, Steve,1980-Stockholms universitet,Oskar Klein-centrum för kosmopartikelfysik (OKC),Fysikum(Swepub:su)stsc6413 (author)
  • Chomiuk, Laura (author)
  • Pérez-Torres, Miguel (author)
  • Harris, Chelsea (author)
  • Lundqvist, Peter,1957-Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)lundq (author)
  • Graham, Matthew (author)
  • Yang, Sheng,1990-Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Henan Academy of Sciences, China(Swepub:su)yash0613 (author)
  • Perley, Daniel A. (author)
  • Strotjohann, Nora Linn (author)
  • Fremling, Christoffer (author)
  • Gal-Yam, Avishay (author)
  • Lezmy, Jeremy (author)
  • Maguire, Kate (author)
  • Omand, Conor M. B.,1992-Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)coom9840 (author)
  • Smith, Mathew (author)
  • Andreoni, Igor (author)
  • Bellm, Eric C. (author)
  • Bloom, Joshua S. (author)
  • De, Kishalay (author)
  • Groom, Steven L. (author)
  • Kasliwal, Mansi M. (author)
  • Masci, Frank J. (author)
  • Medford, Michael S. (author)
  • Park, Sungmin (author)
  • Purdum, Josiah (author)
  • Reynolds, Thomas M. (author)
  • Riddle, Reed (author)
  • Robert, Estelle (author)
  • Ryder, Stuart D. (author)
  • Sharma, Yashvi (author)
  • Stern, Daniel (author)
  • Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

Related titles

  • In:Nature617:7961, s. 477-4820028-08361476-4687

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