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Publication Open Access A NuSTAR Study of Quasiperiodic Oscillations from the Ultraluminous X-Ray Sources in M82(American Astronomical Society, 2025-08-18); ; ;Silvia Columbu ;Giuseppe Rodriguez; ;Matthew J. Middleton ;Dominic J. Walton ;Murray Brightman ;Hannah Earnshaw ;Karl Forster ;Brian Grefenstette ;Felix Fürst ;Marianne Heida; ; Thomas MaccaroneThe study of quasiperiodic oscillations (QPOs) in X-ray binaries provides valuable insights into the physics of accretion around compact objects. The M82 galaxy hosts multiple ultraluminous X-ray sources, including two prominent ones—X-1 and X-2—where X-1 is suspected to harbor an intermediate-mass black hole. In this work, we analyze data from 39 NuSTAR observations acquired between 2014 and 2024 to investigate the aperiodic X-ray variability in M82. In particular, we study in detail the evolution of the QPOs from M82 X-1 in the range 20–300 mHz. We do not find additional timing features in the data, besides a frequently present broad noise component at lower frequencies. The QPO behaves similarly to other classes of low-frequency oscillations in accreting compact objects, both black holes and neutron stars.Scopus© Citations 1 4 14