March 25, 1996 - March 25, 2029

  • Date:13WednesdayMay 2009

    Fluctuation analyses and the Mass-Timescale relation in accreting Black Holes

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    Time
    11:15 - 12:30
    Location
    Edna and K.B. Weissman Building of Physical Sciences
    LecturerA. Wandel
    Hebrew U.
    Organizer
    Nella and Leon Benoziyo Center for Astrophysics
    Contact
    avishay.gal-yam@weizmann.ac.il
    AbstractShow full text abstract about We use the Structure-Function (SF) method to analyse X-ray f...»
    We use the Structure-Function (SF) method to analyse X-ray fluctuations in
    RXTE and NXMM data of about 20 Seyfert nuclei. Linear correlation is found
    between the break-timescale in the fluctuation spectrum (Tb) and the black
    hole mass Mbh. The robustness of the SF method enables us to double the data
    set available by the power spectral density method and the resulting
    correlation between X-ray spectral break and Mbh (e.g. McHardy 2004;06).
    The Mbh-Tb correlation seems to extrapolate to lower masses, e.g. to Cyg
    X-1 other Galactic BHs and to low mass AGNs. This may predict a common
    physical mechanism for X-ray variability in accreting BHs of stellar mass
    and AGNs.
    Lecture