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- W3101726421 abstract "Type Ia supernovae have proven vital to our understanding of cosmology, both as standard candles and for their role in galactic chemical evolution; however, their origin remains uncertain. The canonical accretion model implies a hot and luminous progenitor that would ionize the surrounding gas out to a radius of ~10–100 pc for ~100,000 years after the explosion. Here, we report stringent upper limits on the temperature and luminosity of the progenitor of Tycho’s supernova (SN 1572), determined using the remnant itself as a probe of its environment. Hot, luminous progenitors that would have produced a greater hydrogen ionization fraction than that measured at the radius of the present remnant (~3 pc) can thus be excluded. This conclusively rules out steadily nuclear-burning white dwarfs (supersoft X-ray sources), as well as disk emission from a Chandrasekhar-mass white dwarf accreting approximately greater than 10−8 M ⊙ yr−1 (recurrent novae; M ⊙ is equal to one solar mass). The lack of a surrounding Strömgren sphere is consistent with the merger of a double white dwarf binary, although other more exotic scenarios may be possible. By assessing the ionization fraction of the environment around Tycho’s (type Ia) supernova, the authors have constrained the properties of its progenitor enough to rule out a hot, luminous white dwarf. A double white dwarf binary merger is allowed." @default.
- W3101726421 created "2020-11-23" @default.
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- W3101726421 date "2017-09-25" @default.
- W3101726421 modified "2023-10-01" @default.
- W3101726421 title "No hot and luminous progenitor for Tycho’s supernova" @default.
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- W3101726421 doi "https://doi.org/10.1038/s41550-017-0263-5" @default.
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