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An anomalous positron abundance in cosmic rays with energies 1.5–100 GeV
It is found that the positron fraction increases sharply over much of that range, in a way that appears to be completely inconsistent with secondary sources, and is concluded that a primary source, be it an astrophysical object or dark matter annihilation, is necessary.
PAMELA Measurements of Cosmic-Ray Proton and Helium Spectra
PAMELA data challenge the current paradigm of cosmic-ray acceleration in supernova remnants followed by diffusive propagation in the Galaxy and find that the spectral shapes of these two species are different and cannot be described well by a single power law.
PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy.
The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray antiproton flux and the antiproton-to-proton flux ratio which extends previously published measurements…
Cosmic-ray electron flux measured by the PAMELA experiment between 1 and 625 GeV.
New results regarding negatively charged electrons between 1 and 625 GeV performed by the satellite-borne experiment PAMELA are presented, this is the first time that cosmic-ray e⁻ have been identified above 50 GeV.
Observation of an anomalous positron abundance in the cosmic radiation
Positrons are known to be produced in interactions between cosmic-ray nuclei and interstellar matter ("secondary production"). Positrons may, however, also be created by dark matter particle…
New measurement of the antiproton-to-proton flux ratio up to 100 GeV in the cosmic radiation.
A new measurement of the cosmic-ray antiproton-to-proton flux ratio between 1 and 100 GeV is presented, which is a tenfold improvement in statistics with respect to all previously published data.
Description of Aquimarina muelleri gen. nov., sp. nov., and proposal of the reclassification of [Cytophaga] latercula Lewin 1969 as Stanierella latercula gen. nov., comb. nov.
The taxonomic position of three novel sea-water isolates was determined and the species [Cytophaga] latercula Lewin 1969 is proposed to be reclassified in the new genus Stanierellas as Stanierella latercul a gen. nov.
Idiomarina gen. nov., comprising novel indigenous deep-sea bacteria from the Pacific Ocean, including descriptions of two species, Idiomarina abyssalis sp. nov. and Idiomarina zobellii sp. nov.
Two bacterial strains, KMM 227T and 231T, were isolated from seawater samples collected from the north-western Pacific Ocean at a depth of 4000-5000 m and were characterized using polyphasic taxonomy, indicating that the two strains formed a distinct lineage within a clade containing the genera Alteromonas, Colwellia and Pseudoalteromonas in the gamma-Proteobacteria.
Cosmic-ray positron energy spectrum measured by PAMELA.
The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray positron flux and fraction that extends previously published measurements up to 300 GeV in kinetic energy.
MEASUREMENT OF BORON AND CARBON FLUXES IN COSMIC RAYS WITH THE PAMELA EXPERIMENT
The propagation of cosmic rays inside our galaxy plays a fundamental role in shaping their injection spectra into those observed at Earth. One of the best tools to investigate this issue is the ratio…