Could there be terrestrial signatures of the EUV pulse from Supernova 1987 A?

Details Could there be terrestrial signatures of the EUV pulse from Supernova 1987 A? Could there be terrestrial signatures of the EUV pulse from Supernova 1987 A?

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...183l..27o&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 183, no. 2, Sept. 1987, p. L27-L29.

Astronomy and Astrophysics

Astrophysics

2

E Region, Extreme Ultraviolet Radiation, Ionospheric Electron Density, Shock Waves, Stellar Models, Supernovae, Gravitational Collapse, Stellar Envelopes, Stellar Structure

Scientific paper

Models for the emergence of the shock wave from the envelope of a type II supernova indicate that an ultraviolet to soft X-ray (EUV) pulsar should accompany the break-out. The spectrum and the time profile of this pulse is sensitive to the energetics of the explosion as well as the envelope structure of the progenitor. For the case of SN 1987A, the expected EUV pulse should be delayed about one hour with respect to the collapse time, and should have an effective temperature around 106K, a total energy of 1046 to 1048ergs, and a duration of several hundred seconds. This burst would have given rise to an energy flux of 0.01 - 1.0 erg cm-2 at the earth leading to an enhancement of the electron concentration in the E-layer of the ionosphere by up to 7×103cm-3. A detection of this enhancement by experiments monitoring ionospheric parameters could give indirect information on the otherwise unobservable EUV pulse.

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