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- W13521751 abstract "The outburst of a new star is probably the most spectacular phenomenon in Nature. From a body of comparatively insignificant luminosity it rises in a few days, or hours, to one that is thousands of times more brilliant than the Sun. Reliable determinations of the absolute magnitudes of single novae are not available but fairly trustworthy estimates of their order of brightness as a class have been made, and they appear at maximum to be about 7th or 8th absolute magnitude. The absolute magnitude of the Sun is -f-5, so that on the basis of this estimate a nova at maximum may be 13 magnitudes brighter than the Sun, that is to say, 150,000 times as bright. For the moment of its glory it has no rival in the realm of transparent space. The fierce radiation lasts, however, but a few hours, a cosmical instant, then follows an irregular fall in intensity, broken by occasional flare-ups, which endures for a number of years and carries the star, not improbably, back to the brightness it had before the outbreak. The several stages of this development are signalized by transformations of the spectrum that are no less remarkable than the effulgence which accompanies the advent of the star. It must be confessed at the outset that we know nothing whatever of the causes of novae and little enough of the significance of the spectral changes. The spectra are extremely complex and vary greatly in many respects from one star to another. On the other hand, there are certain apparent consistencies among all the novae. The" @default.
- W13521751 created "2016-06-24" @default.
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- W13521751 date "1924-08-01" @default.
- W13521751 modified "2023-10-18" @default.
- W13521751 title "ON THE NATURE OF SOME OF THE TRANSFORMATIONS OBSERVED IN THE STRUCTURE AND SPECTRUM OF A NEW STAR" @default.
- W13521751 doi "https://doi.org/10.1088/1538-3873/36/4/159" @default.
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