In this paper , we identify Cen A and M87 , two nearby Fanaroff-Riley I ( FRI ) radio galaxies , with high-energy-peaked BL Lac-like ( HBL-like ) objects by investigating their spectral energy distributions ( SEDs ) .
The SED peak of Cen A at \sim 150 keV , which was generally believed to be the peak of inverse-Compton emission as in the case of 3C 273 , is found to be actually the peak of synchrotron emission .
The synchrotron emission of M87 peaks in the far UV band .
We summarize the properties of \gamma -ray-loud blazars , especially those of TeV BL Lac objects , and generalize them to HBL-like FRI radio galaxies according to the unified scheme of BL Lac objects and FRI radio galaxies .
We infer that Cen A may have a peak in its Compton component power output at \sim 1 TeV , and that M87 may have a Compton emission peak at \sim 0.1 TeV .
For Cen A , the estimated TeV \gamma -ray flux during outburst is F ( 0.25 - 30 TeV ) = 6.4 \times 10 ^ { -9 } erg cm ^ { -2 } s ^ { -1 } , and for M87 , F ( 0.25 - 30 TeV ) = 1.1 \times 10 ^ { -11 } erg cm ^ { -2 } s ^ { -1 } .
Both fluxes are detectable by TeV detectors available today , and hence Cen A and M87 are TeV \gamma -ray source candidates .
By investigating the long term variability , we predict that Cen A will undergo an outburst in the near future and will be detectable at the TeV \gamma -ray energy range using the CANGAROO and the German-French-Italian experiment HESS TeV \gamma -ray telescopes .