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A.L. Melott, L. Ejzak (University of Kansas), B.C. Thomas (Washburn University)
It is likely that several gamma-ray bursts have been beamed at the Earth from within our galaxy in the last Gy. In previous work, we have established several signficant atmospheric consequences of a galactic typical long-burst GRB, pointing to association with at least one mass extinction. Since GRBs have a wide range of spectral and temporal behavior, we have now explored some of the consquences of varying duration, strong fluctations in flux, and softer/harder spectra.
We gratefully acknowlege the support of the NASA Astrobiology: Exobiology and Evolutionary Biology program.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.