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Paper detail

An evolving hot spot orbiting around Sgr A*

Here we report on recent near-infrared observations of the Sgr A* counterpart associated with the super-massive ~ 4x10^6 M_sun black hole at the Galactic Center. We find that the May 2007 flare shows the highest sub-flare contrast observed until now, as well as evidence for variations in the profile of consecutive sub-flares. We modeled the flare profile variations according to the elongation and change of the shape of a spot due to differential rotation within the accretion disk.

preprint2008arXivOpen access
M. ZamaninasabA. EckartL. MeyerR. SchoedelM. DovciakV. KarasD. KunneriathG. WitzelR. GiessuebelS. KoenigC. StraubmeierA. Zensus
astro-ph
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M. ZamaninasabA. EckartL. MeyerR. SchoedelM. DovciakV. KarasD. KunneriathG. WitzelR. GiessuebelS. KoenigC. StraubmeierA. Zensus

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