The Reverse Shock of SNR 1987A - AstrophysicsReport as inadecuate

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Abstract: The reverse shock of supernova remnant SNR 1987A emits in H-alpha andLy-alpha, and comes in two flavors: surface and interior. The former is due todirect, impact excitation of hydrogen atoms crossing the shock, while thelatter is the result of charge transfer reactions between these atoms andslower, post-shock ions. Interior and surface emission are analogous to thebroad- and narrow-line components observed in Balmer-dominated SNRs. Isummarize a formalism to derive line intensities and ratios in these SNRs, aswell as a study of the transition zone in supernova shocks; I include anappendix where I derive in detail the ratio of broad to narrow H-alphaemission. Further study of the reverse shock emission from SNR 1987A will allowus to predict when it will vanish and further investigate the origins of theinterior emission.

Author: Kevin Heng



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