2012ApJ...758L..11Y -
Astrophys. J., 758, L11 (2012/October-2)
A 3 pc scale jet-driven outflow from Sgr A*.
YUSEF-ZADEH F., ARENDT R., BUSHOUSE H., COTTON W., HAGGARD D., POUND M.W., ROBERTS D.A., ROYSTER M. and WARDLE M.
Abstract (from CDS):
The compact radio source Sgr A* is coincident with a 4x106 M☉ black hole at the dynamical center of the Galaxy and is surrounded by dense orbiting ionized and molecular gas. We present high-resolution radio continuum images of the central 3' and report a faint continuous linear structure centered on Sgr A* with a P.A. ∼ 60°. The extension of this feature appears to be terminated symmetrically by two linearly polarized structures at 8.4 GHz, ∼75'' from Sgr A*. A number of weak blobs of radio emission with X-ray counterparts are detected along the axis of the linear structure. The linear structure is best characterized by a mildly relativistic jet from Sgr A* with an outflow rate 10–6 M☉/yr. The near and far sides of the jet are interacting with orbiting ionized and molecular gas over the last 1-3 hundred years and are responsible for a 2'' hole, the "minicavity," characterized by disturbed kinematics, enhanced Fe II/III line emission, and diffuse X-ray gas. The estimated kinetic luminosity of the outflow is ∼1.2x1041 erg/s, so the interaction with the bar may be responsible for the Galactic center X-ray flash inferred to be responsible for much of the fluorescent Fe Kα line emission from the inner 100 pc of the Galaxy.
Abstract Copyright:
∼
Journal keyword(s):
accretion, accretion disks - black hole physics - Galaxy: center
Errata:
erratum vol. 777, art. L39 (2013)
Simbad objects:
7
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