SIMBAD references

2005A&A...439L...9C - Astronomy and Astrophysics, volume 439, L9-13 (2005/8-4)

A dual emission mechanism in Sgr A*.

CLENET Y., ROUAN D., GRATADOUR D., MARCO O., LENA P., AGEORGES N. and GENDRON E.

Abstract (from CDS):

We have collected in 2004 adaptive optics corrected L' images of the Galactic Center region with NAOS-CONICA at VLT. A strong variability was observed as well as a correlation between the photocenter positions and fluxes of the L'-band counterpart of Sgr A*. It is interpreted as the combined emission of a point-like flaring source at the position of Sgr A*/IR itself and an extended dust structure, 75mas south west of Sgr A*/IR, which we name Sgr A*-f. We examine the different possible mechanisms to explain this dual Sgr A* L' emission and conclude it is likely a flaring emission associated to energetic events in the close environment of the black hole plus a quiescent emission resulting from the collision of Sgr A*-f by a jet from Sgr A*.

Abstract Copyright:

Journal keyword(s): Galaxy: center - infrared: stars - instrumentation: adaptive optics

Simbad objects: 8

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