A combined Keck and VLT study of the near-infrared properties of Sgr A*

Details A combined Keck and VLT study of the near-infrared properties of Sgr A* A combined Keck and VLT study of the near-infrared properties of Sgr A*

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21321006m&link_type=abstract

American Astronomical Society, AAS Meeting #213, #210.06; Bulletin of the American Astronomical Society, Vol. 41, p.282

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the longest NIR light curves of Sgr A* reported so far achieved by combining VLT and Keck data. One common night fortuitously had also simultaneous Chandra X-ray and SMA millimeter observations. We show that very long light curves are needed for a meaningful cross-correlation analysis between the NIR- and mm-regime, and clarify the reported time lags between both wavelengths. Furthermore, we present timing analysis of the NIR light curves that leads to the conclusion that no persistent quasi-periodic oscillation is detectable. This, together with recent refined intrinsic source measurements from submm VLBI, constrains proposed models of relativistically orbiting inhomogeneities in the accretion flow onto Sgr A*.

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