מרץ 25, 1996 - מרץ 25, 2029

  • Date:13רביעימאי 2009

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

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    שעה
    11:15 - 12:30
    מיקום
    בניין הפיזיקה ע"ש עדנה וק.ב. וייסמן
    מרצהA. Wandel
    Hebrew U.
    מארגן
    מרכז לאסטרופיזיקה עש נלה וליאון בנוזיו
    צרו קשר
    avishay.gal-yam@weizmann.ac.il
    תקצירShow 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.
    הרצאה