K-band polarimetry of an Sgr A* flare with a clear sub-flare structure
L. MeyerI. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, GermanyR. SchödelI. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, GermanyA. EckartI. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, GermanyV. KarasAstronomical Institute, Academy of Sciences, Boční II, 14131 Prague, Czech RepublicMichal DovčiakAstronomical Institute, Academy of Sciences, Boční II, 14131 Prague, Czech RepublicW. J. DuschlInstitut für Theoretische Physik und Astrophysik, Universität zu Kiel, 24098 Kiel, Germany
2006en
ABI
Аннотация
Context.The supermassive black hole at the Galactic center, Sgr A*, shows frequent radiation outbursts, often called “flares”. In the near-infrared some of these flares were reported as showing intrinsic quasi-periodicities. The flux peaks associated with the quasi-periodic behavior were found to be highly polarized.
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