Huppenkothen, D.D.HuppenkothenYounes, G.G.YounesIngram, A.A.IngramKouveliotou, C.C.KouveliotouGöğüș, E.E.GöğüșBACHETTI, MatteoMatteoBACHETTISánchez-Fernández, C.C.Sánchez-FernándezChenevez, J.J.ChenevezMotta, S.S.Mottavan der Klis, M.M.van der KlisGranot, J.J.GranotGehrels, N.N.GehrelsKuulkers, E.E.KuulkersTomsick, J. A.J. A.TomsickWalton, D. J.D. J.Walton2020-07-242020-07-2420170004-637Xhttp://hdl.handle.net/20.500.12386/26621In 2015 June, the black hole X-ray binary (BHXRB) V404 Cygni went into outburst for the first time since 1989. Here, we present a comprehensive search for quasi-periodic oscillations (QPOs) of V404 Cygni during its recent outburst, utilizing data from six instruments on board five different X-ray missions: Swift/XRT, Fermi/GBM, Chandra/ACIS, INTEGRAL’s IBIS/ISGRI and JEM-X, and NuSTAR. We report the detection of a QPO at 18 mHz simultaneously with both Fermi/GBM and Swift/XRT, another example of a rare but slowly growing new class of mHz-QPOs in BHXRBs linked to sources with a high orbital inclination. Additionally, we find a duo of QPOs in a Chandra/ACIS observation at 73 mHz and 1.03 Hz, as well as a QPO at 136 mHz in a single Swift/XRT observation that can be interpreted as standard Type-C QPOs. Aside from the detected QPOs, there is significant structure in the broadband power, with a strong feature observable in the Chandra observations between 0.1 and 1 Hz. We discuss our results in the context of current models for QPO formation.STAMPAenArticle10.3847/1538-4357/834/1/902-s2.0-85010065631000392152700019https://iopscience.iop.org/article/10.3847/1538-4357/834/1/902017ApJ...834...90HFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_10 High energy and particle astronomy – X-rays, cosmic rays, gamma rays, neutrinos