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High-Energy Astrophysics American and Soviet Perspectives/Proceedings from the U.S.-U.S.S.R. Workshop on High-Energy Astrophysics (1991) / Chapter Skim
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HYDRODYNAMIC STUDY OF SUPERNOVA 1987A: THE PHASE OF A WAVE OF COOLING AND RECOMBINATION
Pages 403-410

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 403...
... We show that the outside layers of the blue supergiant Sk-69°202 jUSt before the supernova 1987A outburst had the- density distribution very close to that of the polytropic model with the index of n=3 and the chemical composition roughly close tO that of the Sun. A mass of these layers is about llM<3.
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From page 404...
... To account for the exponential tail observed after the maximum of the bolometnc light curve requires the amount of cobalt -56 of about 0.08M~. In calculating the hydrodynamic models, the energy of the radioactive decay of nickel -56 and cobalt 56 is assumed to convert completely into thermal energy.
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From page 405...
... Approximately at the moment of o.a73 days, the shock wave arrives at the stellar surface and then heats its external layers: the effective temperature jumps to Z3 x 105 K and the luminosity rises accordingly. After this the star begins to expand, its outside layers cool rapidly, and the luminosity decreases.
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From page 406...
... Solid lines are the light curves for models 1, 2, and 3. Points are the observational data for the supernova 1987A (Catchpole en al.
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From page 407...
... Thus, the effective temperature of He supernova 1987A during the phase of the WCR shows that the outside layers of about llM:> in the blue supergiant Sk~9°202 had the chemical composition roughly close to that of the Sun.
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From page 408...
... . o So 2 1 It o' 1b 2b ~_= - - + ~+.+ 3b Rb 5t ' 6t ' 7b eb eb 1bo ORtS FIGURE 3 Time dependence of the effective temperature.
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From page 409...
... Catchpole, G van Vuuren, et al.
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Key Terms

  • represent models
  • roughly close
  • blue supergiant
  • solid lines
  • lines represent

  • density distribution
  • effective temperature
  • composition roughly
  • time dependence
  • edective temperature

  • bolometnc light
  • orts figure
  • light curve
  • observational data
  • polytropic model

  • outside layers
  • van vuuren
  • space sci
  • eb eb
  • crosses correspond

  • hydrodynamic study
  • experimental physics
  • utrobin institute
  • soviet perspectives


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