Abstract
<i>Aims. <i/>SNR RX J1713.7-3946 is perhaps one of the best observed shell-type supernova remnants with emissions dominated by energetic particles accelerated near the shock front. The nature of the TeV emission, however, is an issue still open to investigation.<i>Methods. <i/>We carried out a systematic study of four lepton models for the TeV emission with the Markov chain Monte Carlo method.<i>Results. <i/>It is shown that current data already give good constraints on the model parameters. Two commonly used parametric models do not appear to fit the observed radio, X-ray, and <i>γ<i/>-ray spectra. Models motivated by diffusive shock acceleration and by stochastic acceleration by compressive waves in the shock downstream give comparably good fits. The former has a sharper spectral cutoff in the hard X-ray band than the latter. Future observations with the <i>HXMT<i/> and <i>NuSTAR<i/> may distinguish these two models.
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