Beating the confusion limit: the necessity of high angular resolution for probing the physics of Sagittarius A* and its environment: opportunities for LINC-NIRVANA (LBT …

A Eckart, N Sabha, G Witzel… - Optical and Infrared …, 2012 - spiedigitallibrary.org
A Eckart, N Sabha, G Witzel, C Straubmeier, B Shahzamanian, M Valencia-S…
Optical and Infrared Interferometry III, 2012spiedigitallibrary.org
The super-massive 4 million solar mass black hole (SMBH) SgrA* shows variable emission
from the millimeter to the X-ray domain. A detailed analysis of the infrared light curves allows
us to address the accretion phenomenon in a statistical way. The analysis shows that the
near-infrared flux density excursions are dominated by a single state power law, with the low
states of SgrA* are limited by confusion through the unresolved stellar background. We
show that for 8-10m class telescopes blending effects along the line of sight will result in …
The super-massive 4 million solar mass black hole (SMBH) SgrA* shows variable emission from the millimeter to the X-ray domain. A detailed analysis of the infrared light curves allows us to address the accretion phenomenon in a statistical way. The analysis shows that the near-infrared flux density excursions are dominated by a single state power law, with the low states of SgrA* are limited by confusion through the unresolved stellar background. We show that for 8-10m class telescopes blending effects along the line of sight will result in artificial compact star-like objects of 0.5-1 mJy that last for about 3-4 years. We discuss how the imaging capabilities of GRAVITY at the VLTI, LINC-NIRVANA at the LBT and METIS at the E-ELT will contribute to the investigation of the low variability states of SgrA*.
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