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“…We investigated the potential biological impacts at Earth's surface of stratospheric O(3) depletion caused by nearby supernovae known to have occurred about 2.5 and 8 million years ago at about 50 pc distance. …”
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“…In this paper, we present a ``Minimal Void'' scenario, i.e. a ``void'' with minimal underdensity contrast (of about -0.4) and radius (~ 200-250 Mpc/h) that can, not only be consistent with the supernovae data, but also with the 3-yr WMAP data. We also discuss consistency of our model with various other measurements such as Big Bang Nucleosynthesis, Baryon Acoustic Oscillations and local measurements of the Hubble parameter. …”
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“…Supernova explosions provide the most sensitive probes of neutrino propagation, such as the possibility that neutrino velocities might be affected by the foamy structure of space-time thought to be generated by quantum-gravitational (QG) effects. …”
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“…In this paper we find the region in parameter space that is constrained by supernova cooling constraints when the models include dark sector particles with masses around 100 MeV or less. …”
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“…Several searches have found evidence of $^{60}$Fe deposition, presumably from a near-Earth supernova (SN), with concentrations that vary in different locations on Earth. …”
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“…We examine the possibility that a nearby supernova explosion could have caused one or more of the mass extinctions identified by palaeontologists. …”
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“…There is a wealth of data on live, undecayed $^{60}$Fe (t$_{1/2}$ = 2.6 Myr) in deep-sea deposits, the lunar regolith, cosmic rays, and Antarctic snow, which is interpreted as originating from the recent explosions of at least two near-Earth supernovae. We use the $^{60}$Fe profiles in deep-sea sediments to estimate the timescale of supernova debris deposition beginning ∼3 Myr ago. …”
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“…We discuss scenarios in which the data are consistent with a supernova event at a distance $D \sim 30$ pc and an epoch $t_{\rm SN} \sim 5$ Myr ago. …”
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“…We examine the consequences of these different masses-and-mixing schemes for the observable spectra of neutrinos from the burst of a Type II supernova. We point out the distinguishing features of these schemes, and discuss the prospects of identifying the scheme from the spectra with minimal dependence on supernova models. …”
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“…We show that GRB 010921 was indeed associated with a 1998bw-like supernova at the GRB's redshift.…”
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“…We show that GRB 011121 was indeed associated with a 1998bw-like supernova at the GRB's redshift, as we had specifically predicted for this GRB before the supernova could be observed.…”
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“…Since 60Fe has a mean life of 2.2 Myr, a near-Earth supernova is the only likely source for such a signal, and we explore here the consequences of a supernova origin. …”
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“…The calculation is relevant to supernova theory. In both models, for A>10, spin- (if any) and isospin-dependent effects are comfortably below 10% of the coherent scattering. …”
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