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Precisely Measuring Velocity Of Supernova Shockwave

August 13, 2013 1 comment

©Keio University / NAOJ

©Keio University / NAOJ

A research team led by Tomoro Sashida and Tomoharu Oka (Keio University) has succeeded in precisely measuring the expansion velocity of a shockwave of the supernova remnant W44. The remnant is located in the constellation of Aquila, approximately 10,000 light-years away from our solar system. The team observed the high-temperature and high-density molecular gas in the millimeter/submillimeter wave ranges. The analysis shows that the expansion velocity of the W44 shockwave is 12.9±0.2 km/sec. In addition, it became clear that the supernova explosion released kinetic energy of (1-3)×1050 erg into the interstellar medium. The energy emitted from the Sun is approximately 3.6 × 1033 ergs/sec. Can you image how enormous amount of energy is released from the supernova explosion? Furthermore, other molecular gas with an extremely high velocity of higher than 100 km/sec was also detected. The origin of this super-high-velocity molecular gas remains unclear at the present time.

Full Story: http://www.nao.ac.jp/en/news/science/2013/20130809-nro.html

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Early Solar System Garnet-Like Mineral Named For Livermore Cosmochemist

August 13, 2013 Leave a comment

Photos by Julie Korhummel/LLNL

Photo by Julie Korhummel/LLNL

A recently discovered mineral appears to be clear but may have a tinge of light blue. No matter its color, you won’t be able to make earrings from it.

For one, you can’t see the material with the naked eye. Hutcheonite, recently named after Lawrence Livermore meteorite researcher Ian Hutcheon, can be seen only with high powered scanning electron microscopes.

Known also by its chemical makeup, Ca3Ti2SiAl2O12, hutcheonite was discovered in a refractory inclusion in the Allende meteorite by Sasha Krot (University of Hawaii) and Chi Ma (Caltech) and named in honor of Hutcheon, who has made numerous contributions to the study of meteorites and what they can tell us about the evolution of the early solar system.

Full Story: https://www.llnl.gov/news/newsreleases/2013/Aug/NR-13-08-02.html#.Ugp3dH4o5hE