Titlebook: Supernovae; Albert G. Petschek Book 1990 Springer-Verlag New York Inc. 1990 Supernova.astronomy.astrophysics.cosmology.gravitation.gravity

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Classification of Supernovae,rtance of late-time spectra. Other recent discussions of supernova classifications may be found in the chapter by Branch in this volume and by Filippenko (1989). Porter and Filippenko (1987) have summarized the observed properties of SN Ib events.

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0941-7834 their changes the changing seasons. The sun, the moon, and the planets move in what appears to be an unchanging firmament, except occasionally when a new "star" appears. Among the new stars there are comets, novae, and finally supernovae, the subject of this book. Superstitious mankind regarded the

Preamble

Classification of Supernovae,every supernova is unique in some aspect. There have certainly been a number of interesting surprises in the last few years for a field that is nearly 50 years old. In this chapter we give an updated summary of supernova spectral classifications, emphasizing recently introduced subtypes and the impo

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Spectra of Supernovae,e unattainable information about the physical conditions and composition of the radiation source. But the spectra of supernovae resisted interpretation for a very long time. The outstanding obstacle was the great characteristic width of the spectral features150—300 ?—corresponding to Doppler broaden

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Radio Supernovae,ange in the electromagnetic spectrum. However, until recently the only detected radio emission associated with supernovae has been from pulsars, the spinning condensed remains of the stellar explosions, and from supernova remnants (SNR). The SNRs arise either from the interaction of the supernova ej

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Interaction of Supernovae with Circumstellar Matter,onary status of the star. The region around a star that is modified by these processes is referred to as the circumstellar medium. In addition to mass loss from a single star, mass transfer and mass loss in a binary system may play a role in determining the circumstellar environment.

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