A modified Hausdorff distance between X-ray contours and optical galaxy positions identifies matches with 90% purity and reveals X-ray emission in over half of nearby low-velocity-dispersion groups.
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AXES-SDSS: Solving the puzzle of X-ray emission of optical galaxy groups via a modified Hausdorff distance
A modified Hausdorff distance between X-ray contours and optical galaxy positions identifies matches with 90% purity and reveals X-ray emission in over half of nearby low-velocity-dispersion groups.