Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-05-25
Astronomy and Astrophysics
Astrophysics
Accepted to be published in MNRAS (14 pages, 10 figures). Also available at http://www.inaoep.mx/~itziar
Scientific paper
10.1046/j.1365-8711.1999.02830.x
We present a spectro-photometric catalogue of the evolution of supernova 1988Z which combines new and published observations in the radio, optical and X-ray bands, with the aim of offering a comprehensive view of the evolution of this object and deriving the total energy radiated since discovery. The major contribution to the total radiated energy comes at optical to X-ray frequencies, with a total emission of at least $2 \times 10^{51}$ erg (for Ho=50 km/s) in 8.5 years. A model-dependent extrapolation of this value indicates that the total radiated energy may be as high as $10^{52}$ erg. The high value of the radiated energy supports a scenario in which most of the kinetic energy of the ejecta is thermalized and radiated in a short interaction with a dense circumstellar medium of nearly constant density. In this sense, 1988Z is not a supernova but a young and compact supernova remnant.
Aretxaga Itziar
Benetti Stefano
Cappellaro Enrico
Della Valle Massimo
Fabian Andrea C.
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