Detecting Black Hole3

Detecting Black Hole3 - 1 These are detected by observing...

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Detecting Black Holes 1. Mattering that goes into orbit around black holes create an accretion disk a. gas in the accretion disk would be heated b. the heated gas will radiate strongly in the x-ray region of the spectrum 2. Certain binary star systems probably contain black holes 3. Black holes have been detected using indirect methods 4. Some binary star systems contain a black hole Candidates for a Black hole 1. Cygnus X-1 – oldest known candidate for a black hole 2. HDE 226868 - blue supergiant binary 3. LMC X-3 – (third x-ray source found in the Large Magellanic Cloud) 4. A0620-00 - brighter than Cygnus X-1 5. V404 Cygni – best candidate – recurrent super nova 6. Neutron stars can have an accretion disk Supermassive black holes exist at the centers of most galaxies
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Unformatted text preview: 1. These are detected by observing the motions of material around the black hole 2. A nonrotating black hole has only a “center” and a “surface” 3. The entire mass of a black hole is concentrated in an infinitely dense singularity 4. The singularity is surrounded by the event horizon 5. Just three numbers completely describe the structure of a black hole 6. The three physical properties are: mass, electric charge, and angular momentum 7. A rotating black hole (one with angular momentum) has an ergoregion around the outside of the event horizon 8. In the ergoregion, space and time themselves are dragged along with the rotation of the black hole...
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