Quasar Sequence Mystery is solved
Quasars are supermassive black holes living in the center of distant massive galaxies. They shine like the brightest lights in the sky by a strong acceleration problem in their centers of gravity inevitable. New work to solve a mystery quasar were puzzled astronomers for decades. This shows that most of the observed quasar phenomena can be unified with twin quantities: how effective is energized the hole, and the orientation of the display astronomer.
quasars are supermassive black holes living in the center of distant massive galaxies. They shine like the brightest lights in the sky across the electromagnetic spectrum by the accretion of matter gravitationally rapidly lost their centers. The new Carnegie Hubble Fellow working Shen Yue and Luis Ho, the Kavli Institute for Astronomy and Astrophysics (KIAA) at Peking University quasar to solve a mystery that astronomers have been puzzled for 20 years. Their work, published in the Sept. 11 Nature, shows that the observed quasar phenomena can be unified with twin quantities: one that describes how effectively the hole feeds, and reflects the direction of viewing the astronomer.
Quasars have a wide range of aspects, seen by astronomers that reflects the diversity in terms of regions near their centers. But despite this variety, quasars have a surprising amount of regularity in their measurable physical properties, which are well-defined patterns (called "main sequence" of quasars) found that more than 20 years. Shen and Ho solve a puzzle than two decades in the quasar selection: What unifies these properties in the main sequence?
The use of larger and more homogeneous to date more than 20,000 quasars from the Sloan Digital Sky Survey sample, along with several new statistical tests, Shen and Ho were able to demonstrate that a particular property related to the accretion of the hole, called the Eddington report, is the driving force behind the so-called main sequence. Eddington report describes the effectiveness feedstock black hole, the competition between the force of gravity pulling the material inward and outward behavior brightness radiation. This tug of war between gravity and the shine has long been suspected of being the main driver of the so-called main sequence, and their work on time, confirms this hypothesis.
In a further importance, they found that the orientation of the line of fire when you look down into the interior region of the black hole plays an important role in observing the intimate gas moving fast hole, which produces the broad lines emission in the spectra of quasars astronomer. This changes the scientific understanding of the geometry of the region of the line closest to the black hole, a place called the region of the broad emission line: the gas is distributed in a flattened pancake configuration. In the future, this will help astronomers improve their measurements of the mass of the black hole of quasars.
"Our findings have important implications for quasar research. Unification This simple diagram has a way to better understand how supermassive black holes accrete matter and interaction with their environment," Shen said.
"And better measurements of the mass of the black hole will receive a variety of applications in understanding the cosmic growth of supermassive black holes and their role in the formation of galaxies," Ho said.
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