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A new study provides a possible explanation of mysterious X-ray flares detected by the Chandra K-ray Observatory for several years in the region of Sagittarius A*, or Sgr A*. The study suggests a cloud around Sgr A*, a supermassive black hole at the center of our Milky Way Galaxy, which contains hundreds of trillions of asteroids and comets that have been stripped from their parent stars. The flares occur when asteroids of six miles or larger in radius are consumed by the black hole. An asteroid that undergoes a close encounter with another object, such as a star or planet, can be thrown into an orbit headed towards Sgr A*. If the asteroid passes within about 100 million miles of the black hole, roughly the distance between the Earth and the sun, it is torn into pieces by the tidal forces from the black hole. These fragments would then be vaporized by friction as they pass through the hot, thin gas flowing onto Sgr A*, similar to a meteor heating up and glowing as it falls through Earth's atmosphere. A flare is produced and eventually the remains of the asteroid are swallowed by the black hole. Image Credit: Illustrations: NASA/CXC/M.Weiss
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- Analizan el plasma de quarks y gluones en el origen del UniversoCientíficos expertos de varios países analizan desde hoy datos del experimento llevado a cabo en el laboratorio europeo de partículas CERN de recrear el plasma en el »» […]Manuel
- Rare Fusion Reactions Probed with Solar NeutrinosNeutrinos coming from the sun offer a window into the inner workings of our star. Scientists have detected the neutrino signature of several different solar nuclear reactions, »» […]Manuel
- 2nd report from the LHC performance workshopTuesday's sessions were spent looking ahead to the possibilities for 2012. The morning started with the experiments' desiderata for the year with the key requirement being either discovery of Higgs or exclusion at the 95% confidence level dow... […]admin
- Los últimos análisis de ATLAS y CMS sobre la búsqueda del Higgs en el LHC, listos para su publicaciónLos análisis sobre la búsqueda del bosón de Higgs predicho por el Modelo Estándar de Física de Partículas, presentados por los experimentos ATLAS y CMS del Gran »» […]Manuel
- 1st report from the LHC performance workshopYesterday, 6 February, the LHC Performance workshop 2012 kicked off in a very chilly Chamonix (-12 degrees C in town at midday, nearer -30 on the top of Les Grand Montets). The first day was devoted to a critical review of 2011. 2011 was a ... […]admin
- Encuentro de transferencia tecnológica en detectores sensibles de posición de estado sólidoLa red europea AIDA (Advanced European Infrastructures for Detectors at Accelerators), con el apoyo de la red HEPTech, organiza en DESY (Hamburgo) un evento de transferencia tecnológica en detectores sensibles de »» […]Manuel
- La ‘Posidonia oceanica’ es la especie más longeva de la biosferaUn equipo de investigadores del Consejo Superior de Investigaciones Científicas (CSIC) ha hallado en Formentera un clon de Posidonia oceanica, una especie marina amenazada y endémica del »» […]Manuel
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