We propose a search strategy for isolated stellar mass black holes in the solar neighborhood using information from the Sloan Digital Sky Survey. Accretion of the interstellar medium onto an isolated black hole is expected to result in a blended, thermal synchrotron spectrum, roughly flat from the optical to the far-infrared. We find that the Sloan Survey will be sensitive to isolated black holes in the range 1-100 solar mass out to a few hundred parsecs. We find that multiband photometry can distinguish black holes from field stars, with black holes having colors similar to QSOs. The holes may then be isolated from QSOs because they have a featureless spectrum with no emission lines. The Sloan Survey will likely find hundreds of objects that meet these criteria, and to reduce the number of candidates we suggest other selection criteria such as infrared observations and proper-motion measurements. If no black hole candidates are found in this survey, important limits can be placed on the local density of black holes and the halo fraction in black holes.
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机译：我们使用Sloan Digital Sky Survey的信息，提出了一种针对太阳附近孤立的恒星质量黑洞的搜索策略。星际介质吸积到一个孤立的黑洞上有望产生混合的热同步加速器光谱，从光学到远红外大致平坦。我们发现，斯隆测量将对1-100太阳质量到几百个视差之间的孤立黑洞敏感。我们发现，多波段测光法可以将黑洞与场星区分开，黑洞的颜色类似于QSO。然后可以将这些孔与QSO隔离，因为它们具有无特征的光谱，没有发射谱线。 Sloan Survey可能会找到数百个满足这些标准的物体，为减少候选对象的数量，我们建议使用其他选择标准，例如红外观测和适当的运动测量。如果在此调查中未找到候选黑洞，则可以对黑洞的局部密度和黑洞中的光晕分数设置重要的限制。
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