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Re: Gideon: Thanks

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Posted by Gideon Yu/">Gideon Yu on September 22, 1997 15:02:00 UTC

: : I agree and that the wavelength that the markers are seen one is xray right ?

: ???

Matthew-

I think youíre asking whether the markers can be in the form of x-rays as opposed to visible light from a supernova. If so, the answer is yes. Often, a black hole (or other super dense dead star like a neutron star) will attract dust and other cosmic particles resulting in what is called an accretion disk around the black hole (picture a flat plate with a black hole at the center). The dust/particles will then tend to rotate around the star, emitting large amounts of x-rays into space.

As you can see, itís not the black hole that is being detected, but the effects of its intense gravity. The x-rays, however, should get eaten up by our upper atmosphere, and are usually only detected by equipment in satellites, etc.

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