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Latest Black hole Stories

Black Holes Could Help Detect Hypothetical Particle
2012-06-19 05:48:11

Lee Rannals for redOrbit.com Scientists have determined that previously undetected particles could be seen as they accumulate around black holes. Vienna University of Technology scientists have discovered a method to prove the existence of hypothetical "axions," which are particles with a very low mass. “The existence of axions is not proven, but it is considered to be quite likely”, Daniel Grumiller, a researcher on the project, said in a press release. Grumiller,...

XMM_GalaxyNGC_410
2012-06-03 07:46:03

Astronomers studying the galaxy NGC 4151 with ESA's XMM-Newton space observatory have detected X-rays emitted and then reflected by ionised iron atoms very close to the supermassive black hole hosted at the galaxy's core. By measuring the time delays occurring in these 'reverberation' events, they were able to map the vicinity of this black hole in unprecedented detail. Supermassive black holes are enormous concentrations of matter, weighing millions to billions of times the mass of the...

Astrophysicists Use Three-Telescope Interferometry To Observe How Black Holes Are Fueled
2012-05-18 03:45:33

By combining the light of three powerful infrared telescopes, an international research team has observed the active accretion phase of a supermassive black hole in the center of a galaxy tens of millions of light years away, a method that has yielded an unprecedented amount of data for such observations. The resolution at which they were able to observe this highly luminescent active galactic nucleus (AGN) has given them direct confirmation of how mass accretes onto black holes in centers of...

Image 1 - Astronomers Find Hypervelocity Stars Ejected From The Galactic Core
2012-05-01 02:53:18

It´s very difficult to kick a star out of the galaxy. In fact, the primary mechanism that astronomers have come up with that can give a star the two-million-plus mile-per-hour kick it takes requires a close encounter with the supermassive black hole at the galaxy´s core. So far astronomers have found 16 of these “hypervelocity” stars. Although they are traveling fast enough to eventually escape the galaxy´s gravitational grasp, they have been discovered while...

Chandra Reveals Outburst From Old Black Holes
2012-04-30 14:03:12

Astronomers using NASA's Chandra X-ray Observatory have found evidence for a population of old stellar black holes. The discovery provides new insight into the nature of stellar black holes, which is a class that can produce as much energy in X-rays as what a million suns could radiate at all wavelengths. The astronomers used Chandra to find an outburst that was produced by a black hole in the spiral galaxy M83, which is located about 15 million light years from Earth. Chandra helped...

Image 1 - NASA Scientists Hunting Blazars Using WISE Telescope
2012-04-14 04:44:09

The hunt is on for a class of supermassive black holes, as scientists at NASA are using a infrared-wavelength astronomical space telescope in order to hunt-down the compact quasars typically associated with the phenomenon, officials at the US space agency revealed on Thursday. Using data obtained from the Wide-field Infrared Survey Explorer (WISE), astronomers have discovered more than 200 of these blazing quasi-stellar objects, and the potential is there to find thousands of additional...

2012-03-30 07:57:46

Idan Ginsburg, a graduate student in Dartmouth's Department of Physics and Astronomy, studies some of the fastest moving objects in the cosmos. When stars and their orbiting plants wander too close to the supermassive black hole at the center of the Milky Way, their encounter with the black hole's gravitational force can either capture them or eject them from the galaxy, like a slingshot, at millions of miles per hour. Although their origin remains a mystery and although they are...

Image 1 - Farthest Supermassive Black Hole Rich In Gas And Dust
2012-03-28 12:41:59

Astronomers from the U.K., France and Germany have discovered vast amounts of gas and dust in the galaxy containing the most distant supermassive black hole known to science. Galaxy J1120+0641 is so far away, that light from it takes over 13 billion years to reach our planet.  This means the light astronomers see from this galaxy is just 740 million years after the Big Bang. The team used the Institut de Radioastronomie Millimetrique (IRAM) array to make their discovery.  This...


Latest Black hole Reference Libraries

7_d6897d09acee1dd0c34d0fbf62ff7d0b2
2004-10-19 04:45:44

X-Ray Astronomy -- Although the more energetic X-rays (E > 30 keV) can penetrate the air at least for distances of a few meters (they would never have been detected and medical X-ray machines would not work if this was not the case) the Earth's atmosphere is thick enough that virtually none are able to penetrate from outer space all the way to the Earth's surface. X-rays in the 0.5 - 5 keV range, where most celestial sources give off the bulk of their energy, can be stopped by a few...

6_0ba47eab12382e6a4e2cc12b1c7ddf782
2004-10-19 04:45:42

Quasar -- A quasar (from quasi-stellar radio source) is an astronomical object that looks like a star in optical telescopes (i.e. it is a point source), but has a very high redshift. The general consensus is that this high redshift is cosmological, the result of Hubble's law and that their redshift indicates that they are typically very distant from Earth; we observe them as they were several billions of years ago. Since we can see them despite their distance, they must emit more...

3_19a73d2fffe222de349da50260d972802
2004-10-19 04:45:40

Cygnus X-1 -- Cygnus X-1 (often abbreviated to Cyg X-1) is an X-ray source in the Cygnus constellation considered to be one of the most likely black hole candidates. The optical counterpart (HDE 226868) is a variable 8.9 magnitude star (visible with good binoculars in good observing conditions.) at right ascension 19 h 56.5 min and declination of 35 deg 4 min (for 1950 epoch). Cyg X-1 is a binary star that contains a O9-B0 supergiant (with a surface temperature of 31000 Kelvin) and a...

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Word of the Day
omadhaun
  • A fool; a simpleton: a term of abuse common in Ireland and to a less extent in the Gaelic-speaking parts of Scotland.
This word is partly Irish in origin.