High energy activity of the super-massive black hole at the Galactic Center
نویسندگان
چکیده
منابع مشابه
Near-Infrared Microlensing of Stars by the Super-Massive Black Hole in the Galactic Center
We investigate microlensing amplification of faint stars in the dense stellar cluster in the Galactic Center by the super-massive black hole, which is thought to coincide with the radio source SgrA . Such amplification events would appear very close to the position of SgrA , and could be observed, in principle, during the monitoring of stellar proper motions in the Galactic Center. We use obser...
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We investigate microlensing amplification of faint stars in the dense stellar cluster in the Galactic Center by the super-massive black hole, which is thought to coincide with the radio source SgrA . Such amplification events would appear very close to the position of SgrA , and could be observed, in principle, during the monitoring of stellar proper motions in the Galactic Center. We use obser...
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We derive an analytical expression of a shadow size as a function of a charge in the Reissner – Nordström (RN) metric. Using the derived expression we consider shadows for negative tidal charges and charges corresponding to naked singularities q = Q/M > 1, where Q and M are black hole charge and mass, respectively. An introduction of a negative tidal charge q can describes black hole solutions ...
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The Center of our Galaxy is a peculiar region where a number of crucial astrophysical phenomena take place, from star formation to SN explosions and accretion onto a massive black hole. The quest for a massive black hole in the Galactic Nucleus is of course of particular relevance because, it would be the closest of such extreme objects, which are now believed to reside in most of the galactic ...
متن کاملPolarimetric Imaging of the Massive Black Hole at the Galactic Center
The radio source Sgr A* in the Galactic center emits a polarized spectrum at millimeter and sub-millimeter wavelengths that is strongly suggestive of relativistic disk accretion onto a massive black hole. We use the well-constrained mass of Sgr A* and a magnetohydrodynamic model of the accretion flow to match both the total flux and polarization from this object. Our results demonstrate explici...
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ژورنال
عنوان ژورنال: Comptes Rendus Physique
سال: 2007
ISSN: 1631-0705
DOI: 10.1016/j.crhy.2006.11.001