The ionization effects of shock breakout in SN 1987A

Details The ionization effects of shock breakout in SN 1987A The ionization effects of shock breakout in SN 1987A

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...322l..85d&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 322, Nov. 15, 1987, p. L85-L89.

Astronomy and Astrophysics

Astrophysics

15

Gas Ionization, Shock Waves, Stellar Models, Supernova 1987A, Ultraviolet Spectra, Halos, Interstellar Matter, Speckle Interferometry, Stellar Winds, Supernova Remnants, Synchrotron Radiation

Scientific paper

The epoch of shock breakout in SN 1987A was almost certainly associated with the production of a pulse of UV photons with a characteristic temperature of order 100,000 K and a duration of 2-4 hr. It is proposed that this pulse has the characteristics required to ionize the precursor stellar wind, temporarily ionize any nearby remnants of the red giant wind, and can ionize the surrounding interstellar medium out to distances of several parsecs for several thousand years. These effects could provide transitory free-free absorption of the synchrotron radio source and may offer an explanation of the ionized knot seen in speckle interferometry. A similar but more powerful outburst could also be responsible for the highly ionized halo seen around the SMC supernova remnant 1E 0102.2-7219.

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