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- W3175655473 abstract "The principal optical properties of type I supernovae are summarized. These include the light curve and the spectrum. The spectra consist of broad bands with very little continuum. According to the theory presented, the observed light is principally fluorescence, excited in the medium surrounding the supernova by ultraviolet radiation originating from the explosion. It is proposed that the spectrum that impinges on the fluorescent medium while emission is taking place must fall abruptly across the Lyman edge of He II. Such a filtering action is plausibly provided by a much denser internal region, rich in helium, immediately surrounding the exploding object. This will form a Stromgren sphere during the time the intense UV pulse is passing through it. The dense region also slows down the photons below the edge by Thomson scattering, thereby spreading out the UV pulse in time. Various proposed mechanisms for the production of ionization in the Gum nebula are discussed." @default.
- W3175655473 created "2021-07-05" @default.
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- W3175655473 date "1971-09-01" @default.
- W3175655473 modified "2023-09-26" @default.
- W3175655473 title "Formation of giant H II regions following supernova explosions" @default.
- W3175655473 hasPublicationYear "1971" @default.
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