Plunging plasma blobs near the marginally stable orbit of Sgr A*

    Research output: Contribution to journalArticle


    Multi-wavelength monitoring of Sgr A* flaring activity confirms the presence of embedded structures within the disk on size scales commensurate with the innermost accretion region, matching size scales that are derived from observed light curves within a broad range of wavelengths. We explore here a few of the observational signatures for an orbiting spot in non-keplerian motion near the event horizon of Sgr A* and model light curves from plunging emitting material near the marginally stable orbit of Sgr A*. All special and general relativistic effects (relativistic beaming, redshifts and blue-shifts, lensing effect, photon time delays) for unpolarized synchrotron emission near a Schwarzschild and Kerr black hole are all taken into consideration.
    Original languageEnglish
    Pages (from-to)5-11
    Number of pages7
    JournalInternational Journal of Astronomy
    Issue number1
    Publication statusPublished - Nov 2015


    • Sgr A* light curve
    • Hot spot model
    • Black hole ray-tracing
    • Plunging orbit
    • Black hole orbital motion


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