Posts Tagged: Distinguished Researchers

The cosmic ray gun duel of Eta Carinae

The cosmic ray gun duel of Eta Carinae

High-precision X-ray observations confirm binary star system shoots cosmic rays     An international collaboration operating NASA’s NuSTAR satellite has revealed that two of the biggest stars in the galaxy are capable of creating cosmic rays. Their results were published in Nature Astronomy this month. In the time it takes you to read this sentence, hundreds of cosmic rays have pummeled through our bodies. Cosmic rays are mostly made of protons and electrons, with the smallest fraction made of X-rays and gamma rays. These jets of high-energy particles not only make up a sizable portion of radiation astronauts and airplane pilots receive, but they also can reach the ends of… Read more

X-ray technology reveals never-before-seen matter around black hole

X-ray technology reveals never-before-seen matter around black hole

X-ray polarimetry resolves shape of matter around Cygnus X-1 black hole     In an international collaboration between Japan and Sweden, scientists clarified how gravity affects the shape of matter near the black hole in binary system Cygnus X-1. Their findings, which were published in Nature Astronomy this month, may help scientists further understand the physics of strong gravity and the evolution of black holes and galaxies. Near the center of the constellation of Cygnus is a star orbiting the first black hole discovered in the universe. Together, they form a binary system known as Cygnus X-1. This black hole is also one of the brightest sources of X-rays in… Read more

New approach allows better modelling of crucial economic activities over time

New approach allows better modelling of crucial economic activities over time

  Researchers in Japan and the UK and USA have developed a better method for modelling important kinds of economic data that may be useful for studying workforces, economic development, health, macroeconomics and other phenomena that vary over time. Dr. Kazuhiko Hayakawa from Hiroshima University and Professor M. Hashem Pesaran from the Trinity College of Cambridge and the University of Southern California present their new and improved approach in the Journal of Econometrics. The new method improves existing techniques for modelling the kind of data that economists call “panel data”, which comes from observing individuals, states, countries, firms and so on, over multiple time periods. Because panel data include observations of… Read more