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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A radio-detected type Ia supernova with helium-rich circumstellar material
AU - Kool, Erik C.
AU - Johansson, Joel
AU - Sollerman, Jesper
AU - Moldón, Javier
AU - Moriya, Takashi J.
AU - Mattila, Seppo
AU - Schulze, Steve
AU - Chomiuk, Laura
AU - Pérez-Torres, Miguel
AU - Harris, Chelsea
AU - Lundqvist, Peter
AU - Graham, Matthew
AU - Yang, Sheng
AU - Perley, Daniel A.
AU - Strotjohann, Nora Linn
AU - Fremling, Christoffer
AU - Gal-Yam, Avishay
AU - Lezmy, Jeremy
AU - Maguire, Kate
AU - Omand, Conor
AU - Smith, Mathew
AU - Andreoni, Igor
AU - Bellm, Eric C.
AU - Bloom, Joshua S.
AU - De, Kishalay
AU - Groom, Steven L.
AU - Kasliwal, Mansi M.
AU - Masci, Frank J.
AU - Medford, Michael S.
AU - Park, Sungmin
AU - Purdum, Josiah
AU - Reynolds, Thomas M.
AU - Riddle, Reed
AU - Robert, Estelle
AU - Ryder, Stuart D.
AU - Sharma, Yashvi
AU - Stern, Daniel
PY - 2023/5/18
Y1 - 2023/5/18
N2 - 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....
AB - 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....
U2 - 10.1038/s41586-023-05916-w
DO - 10.1038/s41586-023-05916-w
M3 - Journal article
C2 - 37198310
VL - 617
SP - 477
EP - 482
JO - Nature
JF - Nature
SN - 0028-0836
IS - 7961
ER -