With its projected sensitivity, low-frequency coverage, and VLBI, the SKA would shift tidal disruption event radio studies from a handful of events to hundreds, enabling population-level inference on jets, black-hole demographics, and nuclear gas.
A Jetted Wandering Massive Black Hole Candidate in a Dwarf Galaxy
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abstract
Wandering massive black holes (MBHs) are thought to form through gravitational recoil or galaxy mergers, but observational confirmation of their displacement in dwarf galaxies, critical laboratories for early-universe SMBH seeding, remains scarce. Using multi-epoch very long baseline interferometry (VLBI), we identify a displaced MBH in the dwarf galaxy MaNGA 12772-12704, located 0.94 kilo-parsec from its optical center. The source exhibits unambiguous signatures of an accreting MBH: a brightness temperature exceeding $10^9$K, a parsec-scale jet, and flux density variability over a 30-year baseline. This system provides the first robust evidence that dynamical black hole interactions predicted in hierarchical galaxy evolution occur even in low-mass hosts. The discovery challenges models requiring centralized gas reservoirs for MBH growth and directly informs high-redshift seeding scenarios.
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Tidal Disruption Events with the SKA
With its projected sensitivity, low-frequency coverage, and VLBI, the SKA would shift tidal disruption event radio studies from a handful of events to hundreds, enabling population-level inference on jets, black-hole demographics, and nuclear gas.