Speckle imaging of 81 RR Lyrae stars detects 10 likely bound companions at 20-220 AU separations, yielding a binary fraction estimate above 12 percent.
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Simulations predict Roman will detect roughly 11,000 microlensing events including about 100 with isolated neutron star lenses, using a characteristic feature in log t_E versus log theta_E space for classification.
citing papers explorer
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Finding the elusive RR Lyrae companions via speckle imaging
Speckle imaging of 81 RR Lyrae stars detects 10 likely bound companions at 20-220 AU separations, yielding a binary fraction estimate above 12 percent.
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Astrometric microlensing probes of the isolated neutron star population with Roman
Simulations predict Roman will detect roughly 11,000 microlensing events including about 100 with isolated neutron star lenses, using a characteristic feature in log t_E versus log theta_E space for classification.