A GHz flare in a quiescent black hole and a determination of the mass accretion rate

Sabyasachi Pal, S.K. Chakrabarti

    Research output: Chapter in Book/Conference paperConference paper

    Abstract

    If the total energy of a radio flare is known, one can estimate the mass accretion rate of the disk by assuming equipartition of magnetic energy and the gravitational potential energy of accreting matter. We present here an example of how such an estimate could be done. Our recent radio observation using the Giant Meter Radio Telescope (GMRT) of the galactic black hole transient A0620-00 at 1.280 GHz revealed a micro-flare of a few milli-Jansky. Assuming a black hole mass of 10 M-circle dot for the compact object, we find the accretion rate to be at the most M = (8.5 +/- 1.4) x 10(-11) (x/3)(5/2) M-circle dot yr(-1), where, x is the distance from the black hole in units of Schwarzschild radius. This is consistent with the earlier estimate of the accretion rate based on optical and X-ray observations. We claim that this procedure is general enough to be used for any black hole candidate.
    Original languageEnglish
    Title of host publicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
    Place of PublicationPEOPLES R CHINA
    Pages331-334
    Volume5
    DOIs
    Publication statusPublished - 2005
    EventA GHz flare in a quiescent black hole and a determination of the mass accretion rate - Tsinghua Univ, Beijing, PEOPLES R CHINA
    Duration: 1 Jan 2005 → …

    Conference

    ConferenceA GHz flare in a quiescent black hole and a determination of the mass accretion rate
    Period1/01/05 → …

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