active galactic nuclei

Cosmic collisions ‘aren’t responsible for black hole growth’


January 6th, 2011 - 1:36 pm ICT by ANI
Washington, Jan 6 (ANI): A new study has revealed that cosmic collisions, which have been believed to be the culprit behind increasing growth of black holes, are not to blame.When black holes ... Read more...

Posted in Health Science |

New research explains how galaxy centres light up


July 9th, 2010 - 5:32 pm ICT by ANI
Washington, July 9 (ANI): Scientists have found that galactic nuclei (AGN), the extremely bright centres of some galaxies, which have sustained recent cloud impacts have enough fuel to light up by giving ... Read more...

Posted in Health Science |

What makes black holes at galaxy centre become active


June 16th, 2010 - 6:47 pm ICT by ANI
Washington, June 16 (ANI): Scientists have found the reason for active galactic nuclei; they say the black holes in the centres of most galaxies "switched on" nearly 700 million years ago after ... Read more...

Posted in Health Science |

‘Smoking gun’ of black hole activation found


May 27th, 2010 - 12:56 pm ICT by ANI
Washington, May 27 (ANI): NASA's Swift satellite has provided astronomers the answer to the long standing puzzle about why a small percentage of black holes emit vast amounts of energy.The findings suggest ... Read more...

Posted in Health Science |

Supermassive black holes get displaced from galaxy centres


May 26th, 2010 - 3:40 pm ICT by ANI
Washington, May 26 (ANI): The supermassive black hole (SMBH) at the center of the most massive local galaxy, M87, is not where it was expected, a team of astronomy researchers have ... Read more...

Posted in Health Science |

Astronomers take deep look into material around black holes


December 9th, 2009 - 4:21 pm ICT by ANI
Washington, December 9 (ANI): An international research team has taken a deep look into the shape and geometry of the accreting material around the black hole in nearby Active Galactic Nuclei (AGN).The ... Read more...

Posted in Health Science |

Scientists to use supercomputers to “shine light” on black holes


October 20th, 2009 - 2:19 pm ICT by ANI
Washington, October 20 (ANI): Scientists at the Rochester Institute of Technology (RIT) in the US are all set to make use of two of the fastest supercomputers in the world in their ... Read more...

Posted in Health Science |

Experiment with plasmas sheds light on what happens to matter around black holes


September 3rd, 2009 - 4:53 pm ICT by ANI
Washington, September 3 (ANI): In an experiment, a scientist is using 100,000-degree heat to study ultra-high temperature and non-equilibrium plasmas to mimic what happens to matter in accretion disks around black holes.The ... Read more...

Posted in Health Science |

Catalina Sky Survey finds 700 “optical transients” and 177 supernovae


August 25th, 2009 - 3:16 pm ICT by ANI
Washington, August 25 (ANI): Astronomers, using astronomical data from the University of Arizona's Catalina Sky Survey, have found more than 700 unique "optical transients," or objects that change brightness on time scales ... Read more...

Posted in Health Science |

New calibration by scientists expands Hubble’s capability


March 26th, 2009 - 2:28 pm ICT by ANI
Washington, March 26 (ANI): A scientist at the Rochester Institute of Technology (RIT) has expanded the Hubble Space Telescope's capability by improving the calibration of its instruments.Dan Batcheldor and his team ... Read more...

Posted in Health Science |

Black holes not guilty of shutting down star formation


January 22nd, 2009 - 12:22 pm ICT by ANI
Washington, Jan 22 (ANI): A team of astronomers from Yale University has found evidence that indicates black holes are not responsible for shutting down star formation.They discovered that galaxies stop ... Read more...

Posted in Health Science |

XMM-Newton uncovers well-tuned periodic signal from a super-massive black hole


September 19th, 2008 - 2:50 pm ICT by ANI
Paris, September 19 (ANI): XMM-Newton has uncovered a well-tuned periodic signal from a super-massive black hole lodged at the centre of a galaxy, ending a long quest for such an object.These ... Read more...

Posted in National |

Evidence of role played by colossal black holes in ending star formation in galaxies obtained


June 5th, 2008 - 12:00 pm ICT by ANI
Washington, June 5 (ANI): Astronomers have obtained unprecedented observational evidence of the role that supermassive black holes play in ending star formation in galaxies.Dr Sugata Kaviraj of Oxford University, UK, has ... Read more...

Posted in Entertainment |

New study questions nearby galaxies being source of cosmic rays


November 20th, 2007 - 2:44 pm ICT by admin
London, Nov 20 (ANI): A new research by scientists has discounted an earlier theory attributing the source of cosmic rays as being nearby galaxies. Though the origin of cosmic rays has remained ... Read more...

Posted in Health Science |

Nearby galaxies might be the source of cosmic rays


November 14th, 2007 - 10:19 am ICT by admin
Read more...

Posted in Sci-Tech |

Subscribe