SIMBAD references

2006ApJ...640L.163G - Astrophys. J., 640, L163-L166 (2006/April-1)

Variations in the spectral slope of Sagittarius A* during a near-infrared flare.

GILLESSEN S., EISENHAUER F., QUATAERT E., GENZEL R., PAUMARD T., TRIPPE S., OTT T., ABUTER R., ECKART A., LAGAGE P.O., LEHNERT M.D., TACCONI L.J. and MARTINS F.

Abstract (from CDS):

We have observed a bright flare of Sgr A* in the near-infrared with the adaptive optics-assisted integral-field spectrometer SINFONI. Within the uncertainties, the observed spectrum is featureless and can be described by a power law. Our data suggest that the spectral index is correlated with the instantaneous flux and that both quantities experience significant changes within less than 1 hour. We argue that the near-infrared flares from Sgr A* are due to synchrotron emission of transiently heated electrons, the emission being affected by orbital dynamics and synchrotron cooling, both acting on timescales of ~20 minutes.

Abstract Copyright:

Journal keyword(s): Black Hole Physics - Galaxy: Center - Infrared: Stars - Techniques: Spectroscopic

Simbad objects: 5

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2006ApJ...640L.163G and select 'bookmark this link' or equivalent in the popup menu


2021.12.05-20:38:11

© Université de Strasbourg/CNRS

    • Contact