Astrophysics

   

Gravitational Lensing

Authors: George Rajna

Using gravitational lensing, an international team of astronomers has detected a new Type Ia supernova. [29] Veritable shields against high-energy particles, planets' magnetic fields are produced by iron moving in their liquid core. Yet the dominant model for explaining this system does not fit the smallest celestial bodies. [28] Thanks to an innovative ring laser design, geophysicists at LMU can now measure and monitor Earth's rotation with unprecedented accuracy. [27] Spiral galaxies are found to be strongly rotating, with an angular momentum higher by a factor of about five than ellipticals. [26] Throughout the universe, supersonic shock waves propel cosmic rays and supernova particles to velocities near the speed of light. [25] A team of astronomers from the Inter University Centre for Astronomy & Astrophysics (IUCAA), and Indian Institute of Science Education and Research (IISER), both in Pune, India, and members of two other Indian universities, have identified a previously unknown, extremely large supercluster of galaxies located in the direction of constellation Pisces. [24] Enigmatic 'dark energy', thought to make up 68% of the universe, may not exist at all, according to a Hungarian-American team. [23] Astronomers in the US are setting up an experiment which, if it fails – as others have – could mark the end of a 30-year-old theory. [22] Russian scientists have discovered that the proportion of unstable particles in the composition of dark matter in the days immediately following the Big Bang was no more than 2 percent to 5 percent. Their study has been published in Physical Review D. [21] Researchers from the University of Amsterdam’s (UvA) GRAPPA Center of Excellence have just published the most precise analysis of the fluctuations in the gamma-ray background to date. [20]

Comments: 37 Pages.

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[v1] 2017-07-24 14:40:12

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