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Nabeshin
#5
Mar4-11, 04:17 PM
Sci Advisor
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P: 2,193
The simple fact is not all black holes will have accretion disks. Furthermore, depending on the configuration, it may be difficult to spot the accretion disk. The features are generally going to be quite small, so it's not as if you'll be looking in a telescope and seeing a literal disk around a dark object. It will instead appear as a point source, so it's not (at least completely) trivial to say that it's an accretion disk and not a star (Of course it's actually not that hard to differentiate between the two, they have different light profiles in general).