New limits from microlensing on galactic black holes in the mass range 10 m⊙ < m < 1000 m⊙

HIGHLIGHTS

SUMMARY

    Observations of gravitational waves due to the coalescence of massive objects (Abbott et_al 2016a,b) have demonstrated the existence of merging black holes (BHs) heavier than 10 M, which has renewed interest in BHs as dark matter, especially primordial black holes (PBHs; Bird et_al 2016; Green and amp; Kavanagh 2021; Sasaki et_al 2016). Since the typical duration of microlensing events increases with the lens mass, to detect heavier objects (such as those responsible for gravitational wave emissions), time-series data longer than the durations of each of the EROS-2 (Expérience de Recherche . . .

     

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