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Author

Miguel Zumalacárregui

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Review Oct 2026

Binary-lens amplification of starlight: from magnification flares to quasi-periodic tracking of orbital evolution

Supermassive black hole binaries (SMBHB) are expected at the center of galaxies as a result of galaxy mergers. The dynamics and evolution of SMBHBs shed light on the evolution and formation of galaxies, the gravitational wave background and the nature of gravity. Many methods have been proposed to identify sub-parsec S...

Han-Xi Wang, B. Kocsis, Miguel Zumalacárregui · 0 citations
Preprint Sep 2026

Supernova microlensing as a probe of ultracompact minihalos and primordial cosmology

We propose using supernova microlensing to search for ultracompact minihalos and other extended dark structures seeded by enhanced primordial small-scale power. Unlike conventional microlensing searches, which are often optimized for primordial black holes, cosmological supernovae are sensitive to lenses with physical...

D. Croon, S. Muñoz, Miguel Zumalacárregui · 1 citation

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