A new auroral phenomenon discovered by Finnish researchers a year ago is probably caused by areas of increased oxygen atom density occurring in an atmospheric wave channel. The speculative explanation offered by the researchers gained support from a new study.
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IMAGE: Scientists hope the proposed Interstellar Probe will teach us more about our home in the galaxy as well as how other stars in the galaxy interact with their interstellar neighbourhoods. view more
Credit: Johns Hopkins APL
MUNICH When the four-decades-old Voyager 1 and Voyager 2 spacecraft entered interstellar space in 2012 and 2018, respectively, scientists celebrated. These plucky spacecraft had already traveled 120 times the distance from the Earth to the sun to reach the boundary of the heliosphere, the bubble encompassing our solar system that s affected by the solar wind. The Voyagers discovered the edge of the bubble but left scientists with many questions about how our Sun interacts with the local interstellar medium. The twin Voyagers instruments provide limited data, leaving critical gaps in our understanding of this region.
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IMAGE: a Neutron diffraction patterns of CrBr3 measured at selected temperatures and refined by the Rietveld method. The experimental points and calculated profiles are shown. The ticks below represent the calculated. view more
Credit: Kazan Federal University
Two-dimensional (2D) materials with a single-layer thickness retaining magnetic order in atomically thin limit began to increase their scientific and technological significance after the successful synthesis of graphene and later investigations of van der Waals materials. CrBr3 has been known since the 60s as a van der Waals ferromagnet. Hansen, Tsubokawa, and Dillon have pioneered the work on magnetism in this compound. However, it has only recently been established that CrBr3 exhibits ferromagnetism when exfoliating to several layers and monolayers while saving its magnetic order. Nevertheless, no systematic experimental data simultaneously investigating the temperature behavior of the crystal, the magn
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60Fe yield in 18 solar mass star. Blue lines (LMP) are calculations based on previous decay rate, red lines (present work) are those based on the new measurement.. view more
Credit: Physical Review Letters
Researchers from the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences and their collaborators have recently made great progress in the study of the stellar beta-decay rate of
59Fe, which constitutes an important step towards understanding
60Fe nucleosynthesis in massive stars. The results were published in
Physical Review Letters on April 12.
Radioactive nuclide
60Fe plays an essential role in nuclear astrophysical studies. It is synthesized in massive stars by successive neutron captures on a stable nucleus of
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IMAGE: The V3 loop of an HIV envelope protein gp120 is exposed by the conformational change of 2). A CD4 mimic with PEG blocks the progress from 1) to 2) (the. view more
Credit: Department of Medicinal Chemistry, TMDU
Tokyo, Japan - A team of scientists led by the Institute of Biomaterials and Bioengineering at Tokyo Medical and Dental University (TMDU) have created novel molecules that prevent human immunodeficiency virus (HIV) particles from attacking immune cells. This is accomplished by injecting compounds mimicking the protein the virus usually uses to enter the cells. This work may lead to new treatments for HIV that may be more effective at stopping the proliferation of the virus with fewer side effects.