We report the Suzaku results of HESS J1614 - 518 , which is the brightest extended TeV gamma-ray source discovered in the Galactic plane survey conducted using the H.E.S.S .
telescope .
We discovered three X-ray objects in the field of view of the X-ray Imaging Spectrometer ( XIS ) , which were designated as Suzaku J1614 - 5141 ( src A ) , Suzaku J1614 - 5152 ( src B ) , and Suzaku J1614 - 5148 ( src C ) .
Src A is an extended source located at the peak position of HESS J1614 - 518 , and therefore it is a plausible counterpart to HESS J1614 - 518 .
The X-ray flux in the 2–10 keV band is 5 \times 10 ^ { -13 } erg s ^ { -1 } cm ^ { -2 } , which is an order of magnitude smaller than the TeV flux .
The photon index is 1.7 , which is smaller than the canonical value of synchrotron emissions from high-energy electrons found in some supernova remnants .
These findings present a challenge to models in which the origin of the TeV emission is the inverse Compton scattering of the cosmic microwave background by accelerated electrons that emit X-rays via synchrotron emission .
Src B is located at a relatively dim region in the TeV band image ; however , its hydrogen column density is the same as that of src A .
Therefore , src B may also be physically related to HESS J1614 - 518 .
Src C is a foreground late-type B star .
We also discovered a soft extended X-ray emission near HESS J1614 - 518 .