A Fourier analysis of the magnitudes and timing of the Phanerozoic mass extinctions (MEs) demonstrates that many of the periodicities claimed in other analyses are not statistically significant. ...Moreover we show that the periodicities associated with oscillations of the Solar System about the galactic plane are too irregular to give narrow peaks in the Fourier periodograms. This leads us to conclude that, apart from possibly a small number of major events, astronomical causes for MEs can largely be ruled out.
Periodicity in extinction rates Erlykin, Anatoly D.; Harper, David A. T.; Sloan, Terry ...
Palaeontology,
January 2018, 2018-01-00, 20180101, Volume:
61, Issue:
1
Journal Article
DO WE SEE THE ‘IRON PEAK’? Erlykin, Anatoly D.; Wolfendale, Arnold W.
Acta polytechnica (Prague, Czech Republic : 1992),
01/2013, Volume:
53, Issue:
A
Journal Article
Peer reviewed
Open access
Recent measurements of the cosmic ray (CR) energy spectrum in the PeV region and above have confirmed the remarkable sharpness of the knee and revealed another structure at about 70PeV which we call ...the ‘Iron Peak’. The position and the shape of this structure lead us to associate its likely origin with the same single source responsible for the the knee. We have analysed the shape of the single source spectrum and concluded that its mass composition is rather similar to that for the bulk of CR in the TeV ÷ PeV region. Since it is generally accepted that these CR originate mainly in supernova explosions, this gives an additional argument in favour of our single source being a supernova remnant.
DO WE SEE THE ‘IRON PEAK’? Erlykin, Anatoly D.; Wolfendale, Arnold W.
Acta polytechnica (Prague, Czech Republic : 1992),
12/2013, Volume:
53, Issue:
A
Journal Article
Global Warming—Some Perspectives Anatoly D. Erlykin; Arnold W. Wolfendale; Edward Hanna
Journal of environmental science and engineering. B,
04/2012, Volume:
1, Issue:
4
Journal Article
Global Warming Some Perspectives Erlykin, AD; Wolfendale, A W; Hanna, E
Journal of environmental science and engineering. B,
04/2012, Volume:
1, Issue:
4
Journal Article
Here the authors critically review the IPCC＇s claim that global warming is ＂very likely＂ caused by human activity： such a description underestimates the likelihood of the warming being due to this ...mechanism. Next examined are known alternative ＂natural＂ mechanisms which could give rise to the warming if, despite many claims, the man-made explanation was false because of compensation effects （greenhouse gases versus aerosol effects）. Also, a number of difficulties, as yet unresolved, in the human-induced warming explanation are considered.
We have used recently published data from the Pierre Auger Observatory and the Telescope Array Project to conclude some inferences concerning the origin and composition of ultra high-energy cosmic ...rays (UHECR). We advocate for model the UHECR flux as a combination of the Galactic and Extragalactic components exchanging the dominant role at the famous feature of the energy spectrum called 'the ankle'. We put a special emphasis on the individual experiment energy resolution and possible biases it introduces. We have eventually combined the data from both big experiments to the one 'world average' UHECR spectrum and we used it, supported by the analysis of the distribution of the Extensive Air Shower (EAS) development maximum depth to find the UHECR mass composition of both: Galactic and Extragalactic components. We studied the dependence of the on mass composition on the cosmic ray source distribution in space. We present results for some models existing in the literature. We found the evidence of the deficit of Extragalactic sources in the vicinity of the Galaxy of the the UHECR, what is in concordance with the small scale anisotropy analysis results.
We have updated our analysis of the 9-year WMAP data using the collection of polarization maps looking for the presence of additional evidence for a finite 'cosmic ray foreground' for the CMB. We ...have given special attention to high Galactic latitudes, where the recent BICEP2 findings were reported. The method of examining the correlation with the observed gamma ray flux proposed in our earlier papers and applied to the polarization data shows that the foreground related to cosmic rays is still observed even at high Galactic altitudes and conclusions about gravitational waves are not yet secure. Theory has it that there is important information about inflationary gravitational waves in the fine structure of the CMB polarization properties (polarization vector and angle) and it is necessary to examine further the conclusions that can be gained from studies of the CMB maps, in view of the disturbing foreground effects.
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